CN106256324A - Radiographic apparatus and method of operating thereof - Google Patents
Radiographic apparatus and method of operating thereof Download PDFInfo
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- CN106256324A CN106256324A CN201610390781.9A CN201610390781A CN106256324A CN 106256324 A CN106256324 A CN 106256324A CN 201610390781 A CN201610390781 A CN 201610390781A CN 106256324 A CN106256324 A CN 106256324A
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- shooting angle
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- tumor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/42—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis
- A61B6/4208—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector
- A61B6/4233—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector using matrix detectors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
- A61B6/032—Transmission computed tomography [CT]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/46—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with special arrangements for interfacing with the operator or the patient
- A61B6/461—Displaying means of special interest
- A61B6/463—Displaying means of special interest characterised by displaying multiple images or images and diagnostic data on one display
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
Abstract
The present invention provides a kind of radiographic apparatus and method of operating thereof, by using the CT image photographed in advance reduce radiation and improve sensitivity.On CT data display part in the CT image of display, on Sagittal cross section or Axial cross section, decision is for gathering bronchial path and the bronchus of close tumor of the pliers traveling of cell, in shooting angle operational part, according to the position calculation of bronchus and tumor in order to identify the shooting angle required for tumor and the bronchial depth direction i.e. position relationship of Y-direction in tomosynthesis image.The shooting angle calculated is stored in the storage part of shooting angle, is input to control portion when implementing and checking and implements shooting.The X-ray signal exported from X-ray test section is input to tomosynthesis image constituting portion, constructs tomosynthesis image according to the angle information of storage in the storage part of shooting angle, and show on display part.
Description
Technical field
The present invention relates to a kind of utilize X-ray that the reference object in detected body is constructed and show chromatography X
The radiographic apparatus of radiography combination image and method of operating thereof.
Background technology
Radiographic apparatus, to detected body X-ray irradiation, detects Transmission X by X-ray detector
Ray, thus obtains the X-ray signal of detected body.Then, image processing part is used to process X-ray
Signal, shows radioscopic image or fluoroscopy images in display part.
In such radiographic apparatus, at CT (Computed Tomography computer
Tomoscan) present ground-glass appearance shade (Ground Glass Opacity) on image, internal cell is close
When spending little tumor, there is the situation that cannot confirm tumor in fluoroscopy images.Therefore, it is used for adopting in use
Collection lung tip tumor cell bronchus endoscope biopsy check in, it is impossible to grasp tumor with in order to gather
The position relationship of the utensils such as the pliers that cell is used.
Therefore, in recent years in order to grasp the position relationship of tumor and pliers, following technology is disclosed: shooting
The data of 360 °, construct the cone beam CT techniques of 3-D view, synthesize and clap from advance in fluoroscopy images
The 3D data that the CT data taken the photograph are constructed, it is provided that the information of the current location of endoscope, thus support
The position of the puncture needle that the technology of Examined effect, consideration are arranged on device sets the technology of the shooting anglec of rotation
(with reference to patent documentation 1).
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Application Publication 2013-529533 publication
Summary of the invention
But, in the prior art, although be able to confirm that tumor, but do not study for as object
The optimal shooting angle of the position of tumor, have taken the data also comprising beyond object tumor 360 °, institute
Become many with radiation dose.Although it addition, the three-dimensional lumen image photographed in advance is carried out perspective transform, making
Two-dimentional lumen image for such as seeing from bronchus endoscope from specific direction overlaps ground with fluoroscopy images
Display, but when adjusting initial position, deposit in the case of an error in bronchial location recognition, may
Cannot correctly come tumor.Further, Patent Document 1 discloses because object is that breast carcinoma is so wearing
The structure that the position of pricker etc. are substantially fixed, inserts in the bronchial position correctly identifying tumor vicinity
Enter when pliers, it is difficult to seek to lower radiation dose.
It is an object of the invention to provide the above-mentioned problem of a kind of solution, by from CT image recognition first object
Thing and the second neighbouring object lower radiation dose, and improve the X-ray that sensitivity is acquired
The diagnostic equipment and the method for operating of radiographic apparatus.
In order to reach above-mentioned target, providing a kind of radiographic apparatus in the present invention, it possesses: figure
As process portion, the transmission X-ray of detection detected body, to detected body X-ray irradiation, is obtained by it
X-ray signal as radioscopic image；Shooting angle operational part, the CT image that its use obtains in advance,
Computing is in order to identify first object thing and the position of the second object in tomosynthesis image
Shooting angle required for relation；Control portion, it is controlled thus shoots with shooting angle；Chromatography X
Radiography combination image constituting portion, it constructs chromatography X based on the X-ray signal photographed with shooting angle
Radiography combination image；And display part, it shows tomosynthesis image.
It addition, in order to reach above-mentioned purpose, provide the action of a kind of radiographic apparatus in the present invention
Method, the Transmission X of detection detected body, to detected body X-ray irradiation, is penetrated by radiographic apparatus
Line and the X-ray signal that obtains, as radioscopic image, use the CT image obtained in advance, and computing is
Needed for the position relationship of tomosynthesis image identification first object thing and the second object
The shooting angle wanted, constructs tomosynthesis based on the X-ray signal photographed with shooting angle
Image, shows the tomosynthesis image obtained at display part.
By means of the invention it is possible to visual identification first object thing, and first object can be grasped in Low emissivity ground
Thing and the position relationship of the second object, it is possible to correctly gather first object thing from the most predetermined position.
Accompanying drawing explanation
Fig. 1 is for illustrating the overall structure of the radiographic apparatus of embodiment 1.
Fig. 2 is for illustrating the method shooting angle from the position calculation of bronchus and tumor of embodiment 1, wherein,
Tumor and bronchial centre distance are d, and bronchial radius is r1, and the radius of tumor is r2.
Fig. 3 represents the step shooting angle from the position calculation of bronchus and tumor of embodiment 1.
Fig. 4 represents that the angle-data with shooting angle θ 1 of embodiment 2 shoots, and shows chromatographical X-ray
Photographic combination image.
Fig. 5 represents that the angle-data with shooting angle θ 1 of embodiment 2 shoots, and shows chromatographical X-ray
The step of photographic combination image.
Fig. 6 A represents whole bronchial shooting angle θ (i) calculating tumor vicinity of embodiment 3, and presses
Storing according to preferred sequence, wherein, tumor and bronchial centre distance are d (i), bronchial half
Footpath is r1 (i), and the radius of tumor is r2.
Fig. 6 B is for illustrating an example of the determining method of the preferred sequence of embodiment 3.
Fig. 7 represent embodiment 3 calculate tumor vicinity whole bronchial shooting angle θ (i), and according to
Preferred sequence carries out the step stored.
Fig. 8 represents the side of whole bronchial shooting angle θ (f) that the calculating of embodiment 4 comprises tumor vicinity
Method, wherein, tumor and bronchial centre distance are d (i), and bronchial radius is r1 (i), tumor
Radius be r2.
Fig. 9 represents the step of whole bronchial shooting angle θ (f) that the calculating of embodiment 4 comprises tumor vicinity
Suddenly.
Figure 10 represents that the calculating of embodiment 5 is for avoiding the shooting angle θ z's of the high tissue of X-ray absorption
Method.
Figure 11 represents the step calculating shooting angle θ z of embodiment 5.
Figure 12 represents the method for the aperture width that each shooting angle is determined in advance of embodiment 6, wherein,
Be h1 from X-ray tube to bronchial vertical direction distance, the vertical direction from X-ray tube to tumor away from
From for h2.
Figure 13 represents the step of the aperture width calculating each shooting angle of embodiment 6.
Detailed description of the invention
Hereinafter, use accompanying drawing that the mode being used for implementing the present invention is illustrated.Below in an example,
As the first object thing in tomosynthesis image, the second object, show respectively swollen
Tumor, bronchus, but be not restricted to that this.
(embodiment 1)
Embodiment 1 is the embodiment of radiographic apparatus, and this radiographic apparatus possesses: at image
Reason portion 112, the transmission X-ray of detection detected body, to detected body X-ray irradiation, is obtained by it
X-ray signal as radioscopic image；Shooting angle operational part 126, it uses CT image, and computing is
Needed for the position relationship of tomosynthesis image identification first object thing and the second object
The shooting angle wanted；Control portion 118, it is controlled thus shoots with this shooting angle；Chromatographical X-ray
Photographic combination image construction portion, it constructs chromatography X based on the X-ray signal photographed with this shooting angle
Radiography combination image；Display part 116, it shows tomosynthesis image.It addition, be
The embodiment of the method for operating of radiographic apparatus, detected body is irradiated X by radiographic apparatus penetrates
Line, the X-ray signal obtained by the transmission X-ray of detection detected body, as radioscopic image, makes
With the CT image obtained in advance, computing is in order at tomosynthesis image identification first object thing
With the shooting angle required for the position relationship of the second object, believe based on the X-ray photographed with shooting angle
Number construct tomosynthesis image, and show the X-ray tomographic obtained at display part
Combination image.
Fig. 1 represents an overall structure example of the radiographic apparatus of embodiment 1.Radiodiagnosis fills
Put and possess: the top board 106 of carrying detected body 100, the X of detected body 100 X-ray irradiation is penetrated
Line source 102, set for detected body 100 x-ray irradiation area iris apparatus 104, X is penetrated
High voltage generating unit 108 that line source 102 is powered, it is arranged on the position relative with x-ray source 102,
Detect the X-ray detector 110 of the X-ray of transmission detected body 100, detect for from X-ray
The X-ray signal of device 110 output carries out the image processing part 112 of image procossing, storage from image processing part
The image storage part 114 of the radioscopic image (comprising fluoroscopy images, the most identical) of 112 outputs, display
The display part 116 of radioscopic image, control the control portion 118 of above-mentioned each element, for control portion 118
Carry out the operating portion 120 instructed.
X-ray source 102 has and accepts power supply to produce the X of X-ray from high voltage generating unit 108
Ray tube.It addition, in x-ray source 102, it is possible to have the X of optionally transmission particular energy
The X-ray filter etc. of ray.
Iris apparatus 104 has multiple X-ray blocked from the X-ray of x-ray source 102 generation and blocks
With stereotype, block and determine the X for detected body 100 by moving multiple X-ray respectively with stereotype
Roentgenization region.As it has been described above, iris apparatus 104 is controlled also by control portion 118.
X-ray detector 110 is such as arranged for detecting multiple inspections of X-ray by two-dimensional array shape
Survey element and constitute, be to be irradiated from x-ray source 102, detect and export and transmission detected body 100
The equipment of X-ray signal corresponding to the amount of incident of X-ray.
Image processing part 112 carries out image procossing to the X-ray signal exported from X-ray test section 110,
And export the radioscopic image after image procossing.Image procossing is gamma transformation, greyscale transform process, figure
The expansion of picture/reduce.Image storage part 114 stores the radioscopic image from image processing part 112 output.
Display part 116 shows from the radioscopic image or image storage part 114 of image processing part 112 output
The radioscopic image of storage.
In the radiographic apparatus of the present embodiment, in addition to basic structure portion described above, also
Possesses the tomosynthesis image portion 121 fenced up by a dotted line.This chromatographical X-ray is shone
The structure of combined image portion 121 illustrates.
CT data store 122 stores the CT data photographed in advance.CT data display part 124 shows
The image recalled from CT data store 122 by user operation.Based at CT data display part 124
The CT image of upper display, user, when gathering the tumor as first object thing, determines to be used for gathering tumor
The bronchial route as the second object advanced of pliers, and finally determine to first object thing the most swollen
The the second object i.e. bronchus that tumor is close.
In shooting angle operational part 126, according to first object thing i.e. tumor and second object of above-mentioned decision
The most bronchial position, calculates to identify tumor and bronchus in tomosynthesis image
Depth direction (Y-direction) position relationship required for shooting angle.At this time, it may be necessary to be configured with X
The CT image obtained in advance is configured on the real space of ray inspection arrangement.This is because need basis to exist
The value that CT image upper angle calculates, the bat of the tomosynthesis image in calculating real space
Take the photograph angle.
As above-mentioned collocation method, such as, there is the X-ray by being obtained by X ray checking device saturating
Characteristic portion in visible image and the characteristic portion on CT image compare the side that comparison carries out configuring
Method, or detected body additional marking is shot thus obtain CT image time comprise this labelling,
When obtaining radioscopy image, in the position identical with the labelling added when obtaining CT image to tested
Survey body additional marking, the labelling on the labelling obtained in fluoroscopy images and CT image compared comparison,
The method thus carrying out configuring.Store, in shooting angle storage part 128, the shooting angle calculated, implementing
It is automatically entered into during inspection in the control portion 118 of radiographic apparatus, and automatically or manually real
Execute shooting.
The aperture of aperture width operational part 154 computing iris apparatus 104 under each shooting angle calculated
Width.Aperture width under each shooting angle that will calculate is stored in aperture width storage part 156,
Implement to be input to during X-ray examination the control portion 118 of radiographic apparatus, automatically to control aperture dress
Putting the aperture width of 104, thus the radiographic apparatus of the present embodiment is capable of the inspection of more Low emissivity
Look into.
The X shooting multiple angles that angle photographs exported according to calculating from X-ray test section 110 penetrates
Line signal, and it is entered into tomosynthesis image constituting portion 132.Chromatographical X-ray shines
Combined image construction portion 132 uses the data of input, according to the angle of storage in shooting angle storage part 128
Information constructs tomosynthesis image, and is stored in tomosynthesis image and deposits
In storage portion 134.Display part 116 shows in tomosynthesis image storage part 134 and protect
The radioscopic image deposited.
This concludes the description of the overall structure of the radiographic apparatus of the present embodiment, but at above knot
In structure, x-ray source 102, iris apparatus 104, top board 106, high voltage generating unit 108, X-ray are examined
Survey the block structure beyond device 110 and can be possessed central processing department (CPU), storage part, key by least one
The computer of input unit, the display etc. such as dish is constituted.That is, image storage part 114, CT data store
122, shooting angle storage part 128, aperture width storage part 156, tomosynthesis image are deposited
Storage portion 134 can be made up of the storage part of computer, and operating portion 120, operating portion 130 can defeated by computer
Entering portion to constitute, display part 116, CT data display part 124 can be made up of the display of computer, other
Control portion 118, image processing part 112, shooting angle operational part 126, aperture width operational part 154, layer
The program that the functional devices such as analysis X-ray radiography combination image constituting portion 132 can be performed by the CPU of computer is come
Constitute.
Fig. 2 is used to illustrate that the radiographic apparatus of the present embodiment obtains bat on CT data display part 124
The method taking the photograph angle θ 1.CT data display part 124 showing, the Sagittal (radially) shown in Fig. 2 cuts
Face image or Axial (axially) cross-sectional image, and determine the first object thing i.e. position of tumor 138 and
The the second object i.e. position of bronchus 136 of guide sheath or pliers is inserted in order to gather tumor cell.Root
According to tumor 138 and the position relationship of bronchus 136, determine in order in tomosynthesis image
Shooting required for the position relationship of the depth direction (Y-direction) of middle identification tumor 138 and bronchus 136
Angle 140, and the numerical value at storage shooting angle 140 in shooting angle storage part 128.This shooting angle 140 is in reality
It is automatically entered into when executing inspection in the control portion 118 of radiographic apparatus, automatically or manually real
Execute tomosynthesis shooting.
The X-ray letter of the multiple angles photographed according to shooting angle 140 is exported from X-ray test section 110
Number, and it is entered into tomosynthesis image constituting portion 132.About the data of input, press
Impinge upon the angle information of storage in shooting angle storage part 128 and construct tomosynthesis image, will
It stores in tomosynthesis image storage part 134, and carries out in display part 116
Display.
Use Fig. 3 that the action of the radiographic apparatus of the present embodiment is processed to illustrate.Such as this figure institute
Show, CT data display part 124 shows Sagittal cross-sectional image or Axial cross-sectional image, and determines
Determine the position of tumor 138 and in order to gather the position (S301) of the bronchus 136 of tumor cell.If a gas
In pipe 136 and tumor 138, distance in the heart is d, and the radius of bronchus 136 is rl, tumor 138
Radius is r2.Draw the internal common tangent a of tumor 138 and bronchus 136, obtain central angle θ by following formula
(S302)。
Cos θ=1-2 × ((r1+r2)/d)2(formula 1)
It follows that obtained for identifying bronchus 136 in tomosynthesis image by following formula
Shooting angle θ 1 (S302) with the position relationship of the Y-direction of tumor 138.
θ 1=(180-θ) (formula 2)
By the radiographic apparatus of embodiment, it is possible to first object things such as visual identification tumors, and
The position relationship of the depth direction of tumor and pliers can be grasped by Low emissivity.Thereby, it is possible to from the most pre-
The tumor cell of fixed station acquisition first object thing, thus improve and correctly gather malignant cell from malignant tumor
Sensitivity.Further, since the frequency fall of the cell Resurvey that cannot cause according to predetermined collection cell
Low, therefore the review time shortens, it is possible to lower detected body misery mentally and physically.
(embodiment 2)
Embodiment 2 is to be displayed side by side radioscopic image and X-ray tomographic in display part 116
The radiographic apparatus of combination image and the embodiment of the method for operating of radiographic apparatus.Explanation
The radiographic apparatus of the present embodiment, but the device knot of apparatus structure and the embodiment 1 shown in Fig. 1
Structure is identical, so use Fig. 4, Fig. 5 to stress the difference between embodiment 1 at this.
In the present embodiment, X photography is carried out according to the information of the shooting angle θ 1 determined in embodiment 1
Thus obtain data, display part 116 shows radioscopic image based on the data obtained.The most such as
As shown in Figure 4, fluoroscopy images 401 and tomosynthesis image 402 it are displayed side by side.That is,
In the radiographic apparatus possessing perspective function, show fluoroscopy images 401 in the left side of display part 116,
Observing this fluoroscopy images while the pliers 142 gathering cell is advanced to predetermined tumor vicinity
After bronchus, shoot the data of multiple angle according to the shooting angle θ 1 determined in embodiment 1, generate chromatography
X-ray radiography combination image 402 also shows on display part 116.
Use Fig. 5 that the action of the radiographic apparatus of embodiment 2 is processed to illustrate.Living
When inspection checks, observe fluoroscopy images and make pliers enter into the bronchus (S501) of tumor vicinity.
According to the shooting angle θ 1 inputted in control portion 118, either automatically or manually shoot with angle-data, structure
Build tomosynthesis image (S502).Show that fluoroscopy images 401 and chromatographical X-ray shine simultaneously
Combined image 402 (S503), after user confirms to arrive target bronchial, gathers the cell of tumor
(S504).About making CT image means consistent with radioscopic image, such as, consider to turn CT image
It is changed to the 2D image watched from specific direction, the method obtaining the coupling of position at 2D image to each other,
Or the method using position sensor.
By the radiographic apparatus of the present embodiment, because fluoroscopy images can be displayed side by side in display part
And tomosynthesis image, so in addition to the effect of embodiment 1, it is possible to make user cut
Gather tumor cell on the spot.
(embodiment 3)
Embodiment 3 is each bronchial shooting angle on shooting operational part 126 computing tumor side, angle, controls
Portion 118 is controlled thus carries out the X-ray shot according to the priority predetermined with this shooting angle
The embodiment of the diagnostic equipment.It addition, embodiment 3 is each bronchial shooting angle on computing tumor side,
The X-ray being controlled thus carry out shooting with corresponding shooting angle according to the priority predetermined is examined
The embodiment of the method for operating of disconnected device.Further, the chromatography X of embodiment 3 or radiographic apparatus
Radiography combination image portion 121 according to the bronchus near with the distance of tumor to apart from remote bronchial
Order etc. determines the embodiment of the method for operating of the radiographic apparatus of priority.The X of the present embodiment
The apparatus structure of ray diagnostic device is identical with the apparatus structure of the embodiment 1 shown in Fig. 1, so making at this
With Fig. 6 A, Fig. 6 B, Fig. 7, the X of embodiment 3 is described centered by the difference between embodiment 1
Ray diagnostic device.
The present embodiment difference from embodiment 1 is, obtains tumor and neighbouring multiple bronchial shooting
Angle θ (i).Because bronchus carries out the branch of complexity, so around first object thing i.e. tip tumor
There is multiple bronchus.Therefore, observe fluoroscopy images and pliers is moved to tumor vicinity, but
When constructing tomosynthesis image by embodiment 1, from the second predetermined object i.e.
In the case of bronchus deviation, it is impossible to visual identification pliers and tumor are consequently, it is possible to re-start shooting.
The most in the present embodiment, as shown in figure 6 a, obtain the pliers when biopsy checks may arrive
Shooting angle θ (i) of each bronchus and tumor of tumor vicinity, subsidiary priority stores shooting angle
θ (i), even if thus when checking in the case of predetermined bronchus deviation, it is possible to reference to presetting
Priority identify the position relationship of tumor 138 and pliers 142.
Use Fig. 6 B illustrates an example of the determining method of the priority in the present embodiment.This is preferential
Order can be automatically determined by radiographic apparatus but it also may is used operating portion 130 manual by user
Set.That is, can be realized by configuration program, by this program, in the CT image photographed, base
In the bronchus 139 near with the distance of tumor 138 to the order apart from remote bronchus 141, or with excellent
The bronchus that the highest bronchus is near is to remote bronchial order or near with thick bronchus
The judgment standards such as bronchial order, the order being accessible to tumor 138, by X-ray tomographic group
Close image portion 121 shooting angle operational part 126 automatically determine priority (1), (2), (3),
(4)....It is of course also possible to used the CT image of display in CT data display part 124 by user
Determine.
Pliers 142 enter from make a reservation for different bronchial in the case of, the pliers 142 when implementing shooting
It is not simultaneously displayed on picture with tumor 138.Even if in this case, penetrating according to the X at the present embodiment
The priority set in ray diagnosis apparatus, enters automatically or manually according to the shooting angle of next priority
Row shooting, thus can identify that the tumor 138 position relationship with pliers 142 is to gather tumor at short notice
Cell.
Use Fig. 7 illustrates that the action of the radiographic apparatus of the present embodiment processes.In advance at CT image
Sagittal cross section or Axial cross section in, determine the whole bronchial position of tumor and side
(S701).Draw whole bronchial internal common tangent a (i) of tumor and side, and it is each to use following formula to calculate
From central angle θ (i) (S702).
Cos θ (i)=1-2 × ((r1 (i)+r2)/d (i))2(formula 3)
Then, following formula is used to calculate in order in tomosynthesis image identification tumor and bronchus
Depth direction (Y-direction) position relationship required for angle θ 1 (i) (S703).
θ 1 (i)=(180-θ (i)) (formula 4)
Then, shooting angle operational part 126 calculates whole bronchial shooting angle θ 1 (i) around tumor, and
Subsidiary above-mentioned priority stores in shooting angle storage part 128 (S704), props up arriving target
In the case of trachea, implement shooting (S705) according to the priority of storage.
By the radiographic apparatus of the present embodiment, it is possible to gather the tumor of first object thing more effectively
Cell.
(embodiment 4)
Embodiment 4 is by each bronchial shooting angle of shooting angle operational part 126 computing tumor vicinity, by
Control portion 118 is controlled thus carries out the embodiment shot with the shooting angle comprising this whole shooting angles.
It addition, embodiment 4 is each bronchial shooting angle of computing tumor vicinity, it is controlled thus to comprise
All shoot angle shoots the embodiment that angle carries out the method for operating of the radiographic apparatus shot.Because
The apparatus structure phase of the apparatus structure of the radiographic apparatus of the present embodiment and the embodiment 1 shown in Fig. 1
With, so use Fig. 8, Fig. 9 to stress the difference between embodiment 1, embodiment 3 at this.
The present embodiment difference from embodiment 1 and embodiment 3 is, obtains the multiple of tumor and side
Bronchial shooting angle θ (f).As being schematically shown in fig. 6b, bronchus carries out the branch of complexity,
So there is multiple bronchus around tip tumor.Observe fluoroscopy images while being moved to by pliers
Tumor vicinity, but when constructing tomosynthesis image by embodiment 1, from predetermined
Bronchus deviation in the case of, it is impossible to confirm pliers and tumor, shooting may be re-started.Therefore, exist
In the present embodiment as shown in Figure 8, the whole many of the tumor side that when checking, pliers may arrive are obtained with biopsy
Shooting angle θ (f) between individual bronchus, even if thus when checking from the situation of predetermined bronchus deviation
Under, it is also possible to identify tumor and bronchial position relationship.
The action of the present embodiment processes to use Fig. 9 to illustrate.In advance in the Sagittal cross section of CT image or
In person Axial cross section, determine the whole bronchial position (S901) of tumor and side.Draw tumor with
Whole bronchial internal common tangents a (i), and use following formula to calculate respective central angle θ (i) (S902).
Cos θ (i)=1-2 × ((r1 (i)+r2)/d (i))2(formula 5)
Following formula is used to calculate in order in tomosynthesis image identification tumor and the bronchial degree of depth
Angle θ 1 (i) (S903) required for the position relationship in direction (Y-direction).
θ 1 (i)=(180-θ (i)) (formula 6)
Finally, whole bronchial shooting angle θ 1 (i) of tumor periphery and whole bronchial bats are stored
Take the photograph summation θ (f) (S904) at angle.
θ (f)=Σ θ 1 (i) (formula 7)
As it has been described above, by the present embodiment, obtain in advance by the tumor that when checking with biopsy, pliers may arrive
Shooting angle between whole multiple bronchus on limit, even if thus deviateing predetermined bronchial feelings when checking
Under condition, it is also possible to identify tumor and bronchial position relationship at short notice.
(embodiment 5)
Embodiment 5 is that shooting angle operational part 126 possesses the angle that will not enter with X-ray high-selenium corn tissue
Degree determines to shoot the structure at angle, thus suppresses the chromatographical X-ray caused due to X-ray high-selenium corn tissue
The embodiment of the radiographic apparatus of the image degradation of photographic combination image.It addition, embodiment 5 is with X
The angle that ray high-selenium corn tissue will not enter determines to shoot the action side of the radiographic apparatus at angle
The embodiment of method.Because the apparatus structure of the radiographic apparatus of the present embodiment and the enforcement shown in Fig. 1
The apparatus structure of example 1 is identical, so use Figure 10, Figure 11 to stress and the difference of embodiment 1 at this
Different.
As shown in Figure 10, the shooting circuit of tumor 138 and pliers 142 exists X-ray high-selenium corn group
Knit 144, such as when rib, heart, vertebra, the tomosynthesis figure constructed after becoming shooting
The main cause of the image degradation of picture.Therefore, in the present embodiment, aobvious on CT data display part 124
In the 3-D view shown, determine that X-ray high-selenium corn tissue 144 is shooting on circuit the bat that will not enter
Take the photograph angle θ z, thus suppress image degradation.
Use Figure 11 illustrates that the action of the radiographic apparatus of the present embodiment processes.Show in CT data
Show in the 3-D view shown in portion 124, determine tumor 138 and the bronchus 136 on its side, X-ray
High-selenium corn tissue 144, such as rib, vertebra, the position (S1101) of heart.Based on a determination that these positions
Put relation, determine that X penetrates in first object thing i.e. tumor and the second object the most bronchial shooting circuit
Shooting angle θ z (S1102) that line high-selenium corn tissue 144 will not enter, and it is stored in shooting angle storage part
In 128.When checking, the shooting angle θ z automatic or manual obtained in advance is reflected on device, implements
Shooting (S1103).
By the present embodiment, by the X-ray high-selenium corn tissue that the X-ray absorption such as additional bone or heart are high
Positional information, the tissue avoiding X-ray absorption high shoots, it is possible to suppression image degradation.
(embodiment 6)
Embodiment 6 is to be also equipped with according to CT images based on CT data, the X-ray tube of generation X-ray
The information of rotary system calculate the aperture width operational part of the X-ray aperture width under each shooting angle,
Control portion is controlled thus when shooting with shooting angle, reduces X based on X-ray aperture width
The embodiment of the radiographic apparatus of the structure of ray.It addition, embodiment 6 is based on CT image and product
The information of the rotary system of the X-ray tube of raw X-ray calculates the X-ray aperture width under each shooting angle
Degree, and be controlled thus with shooting angle shoot time, reduce X based on X-ray aperture width
The embodiment of the method for operating of the radiographic apparatus of ray.Because the radiodiagnosis dress of the present embodiment
The apparatus structure put is identical with the apparatus structure of the embodiment 1 shown in Fig. 1, thus at this use Figure 12,
Figure 13 stresses the difference with other embodiments.
In the structure of each embodiment described above, with the mutual alignment relation of grasp tumor with pliers it is being
During target, it is not necessary to become totally visible the image of surrounding tissue.Therefore, use in the present embodiment at Fig. 1
The iris apparatus 104 installed on shown x-ray source 102, does not shoot the image of surrounding tissue so radiating
Dosage lowers.
As shown in figure 12, the swing-around trajectory 148 of the X-ray tube 150 of radioscopy filming apparatus is with X
Circular orbit is become, so showing on CT data display part 124 centered by the center of rotation 146 of ray tube
3-D view in, by setting the center of rotation 146 of X-ray tube on CT image, it is possible at CT
Swing-around trajectory 148 is grasped on image.
Here, set shooting start angle (A) time X-ray tube to target bronchial vertical direction away from
From for h1, when the distance of vertical direction to tumor is h2, obtain the expansion of X-ray between h1, h2
Thus obtain and comprise the pliers pseudo-perspective view with the cross section of tumor as 152.By the chromatographical X-ray of Fig. 1
The aperture width operational part 154 of photographic combination image portion 121 determines the shooting in pseudo-perspective view is as 152
The width of left and right X-ray aperture during beginning angle (A).Then, calculate via shooting angle (B)
The aperture width under whole angles to shooting angle at the end (C), and be stored in aperture width and deposit
In storage portion 156.The center of rotation 146 of X-ray tube is made to be consistent with the position of CT image about when shooting
Means, such as consider the 2D image that CT image is converted to be seen from specific direction, at 2D image
The method obtaining location matches each other, uses the method for position sensor, uses at X-ray tube 150
The methods such as the laser of upper installation.
Secondly, use Figure 13 that the action of the radiographic apparatus of embodiment 6 is processed to illustrate.If
X-ray tube during shooting beginning angle (A) is h1 to the distance of the vertical direction of target bronchial, arrives
The distance of the vertical direction of tumor is h2, obtains the expansion of the X-ray between h1, h2 and thus obtains and comprise
The pseudo-perspective view in the cross section of target pliers and tumor is as 152 (S1302).In aperture width operational part 154,
By using pseudo-perspective view as showing on 152 to come as aperture width beyond the scope of tumor 138 and pliers 142
Aperture width (S1303 S1305) about decision.Calculate to shoot angle at the end (C) complete
The aperture width of the left and right under portion's angle, and be stored in aperture width storage part 156 (S1305).
Although the diagram of eliminating, but by same research is implemented in the cross section kept straight on, can determine upper and lower
Aperture width (S1306).When checking, change according to the value of storage in aperture width storage part 156
Aperture width under each angle, it is possible to more Low emissivity amount to confirm the phase of tumor 138 and pliers 142
Position relationship (S1307) mutually.
That is, by the radiographic apparatus of the present embodiment, it is possible to more Low emissivity amount confirm tumor with
The mutual alignment relation of pliers.
Additionally, the present invention is not limited to above-described embodiment, also comprise various variation.Such as, above-mentioned enforcement
Example is the detailed description carried out to be more fully understood that the present invention, but be not restricted to that to possess explanation
Entire infrastructure.Furthermore it is possible to a part for the structure of certain embodiment to be replaced as the structure of other embodiments.
Furthermore it is possible to add the structure of other embodiments in the structure of certain embodiment.Furthermore it is possible to each reality
Other structure add/is deleted/replaced to a part for the structure executing example.And, although illustrate generate for
Realize the some or all of program in above-mentioned each structure, function, control portion etc., but such as can also lead to
Cross integrated circuit to be designed etc. with hardware to realize part or all of each structure, function, control portion etc..
By the present invention described in detail above, it is possible to confirm to present the first object thing of ground-glass appearance shade,
And first object thing and the position relationship of the second object can be grasped with low radiation dose.Thereby, it is possible to from
The most predetermined station acquisition first object thing, so such as correctly gathering malignant cell from malignant tumor
Sensitivity improves.Further, since the frequency of the cell Resurvey that cannot cause according to predetermined collection cell
Reducing, therefore the review time shortens, it is possible to lower subject misery mentally and physically.
By the present invention, it is whether the biopsy hands of pulmonary carcinoma about the pathological changes of early discovery in diagnosing in pulmonary carcinoma inspection
Art, using the teaching of the invention it is possible to provide a kind of means implementing in high sensitivity to check under low radiation dose, relative to up till now
Till observe until the facility of the growth process that can confirm that under fluoroscopy images, energy for small pathological changes
Whether enough phase judgements provided in more early stage are pernicious means.
The explanation of symbol
100: detected body
102:X radiographic source
104: iris apparatus
106: flat board
108: high voltage generating unit
110:X ray detector
112: image processing part
114: image storage part
116: display part
118: control portion
120: operating portion
121: tomosynthesis image portion
122:CT data store
124:CT data display part
126: shooting angle operational part
128: shooting angle storage part
130: operating portion
132: tomosynthesis image constituting portion
134: tomosynthesis image storage part
136,139,141: bronchus
138: tumor
140: photography angle
142: pliers
144:X ray high-selenium corn tissue (rib, vertebra, heart)
The center of rotation of 146:X ray tube
The swing-around trajectory of 148:X ray tube
150:X ray tube
152: pseudo-perspective view picture
154: aperture width operational part
156: aperture width storage part
401: fluoroscopy images
402: tomosynthesis image.
Claims (10)
1. a radiographic apparatus, it is characterised in that possess:
Image processing part, it, to detected body X-ray irradiation, will detect the Transmission X of described detected body
Ray and the X-ray signal that obtains are as radioscopic image；
Shooting angle operational part, the CT image that its use obtains in advance, computing is in order at X-ray tomographic
Combination image identifies the shooting angle required for the position relationship of first object thing and the second object；
Control portion, it is controlled thus shoots with described shooting angle；
Tomosynthesis image constituting portion, it is based on the described X photographed with described shooting angle
Ray signal, constructs tomosynthesis image；And
Display part, it shows described tomosynthesis image.
Radiographic apparatus the most according to claim 1, it is characterised in that
Described first object thing is tumor, and described second object is bronchus.
Radiographic apparatus the most according to claim 2, it is characterised in that
The each bronchial shooting angle of tumor vicinity described in the operational part computing of described shooting angle,
Described control portion is controlled, thus according to the priority predetermined with corresponding described shooting angle
Shoot.
Radiographic apparatus the most according to claim 3, it is characterised in that
Described radiographic apparatus with the bronchus near with the distance of described tumor to apart from remote bronchus
Order determine described priority.
Radiographic apparatus the most according to claim 2, it is characterised in that
The each bronchial shooting angle of tumor vicinity described in the operational part computing of described shooting angle,
Described control portion is controlled, thus shoots with the shooting angle comprising whole described shooting angles.
Radiographic apparatus the most according to claim 1, it is characterised in that
The angle that described shooting angle operational part will not enter with X-ray high-selenium corn tissue is to determine described bat
Take the photograph angle.
Radiographic apparatus the most according to claim 1, it is characterised in that
Being also equipped with aperture width operational part, its X based on described CT image and the described X-ray of generation penetrates
The information of the rotary system of spool, calculates the X-ray aperture width under each described shooting angle,
Described control portion is controlled, thus when shooting with described shooting angle, penetrates based on described X
Linear light circle width reduces described X-ray.
8. the method for operating of a radiographic apparatus, it is characterised in that
Described radiographic apparatus, to detected body X-ray irradiation, will detect the saturating of described detected body
The X-ray signal penetrating X-ray and obtain, as radioscopic image, uses the CT image obtained in advance,
Computing is in order to close in the position of tomosynthesis image identification first object thing and the second object
Shooting angle required for system, constructs chromatography X based on the described X-ray signal photographed with described shooting angle
Radiography combination image, shows the described tomosynthesis image obtained at display part.
The method of operating of radiographic apparatus the most according to claim 8, it is characterised in that
Described first object thing is tumor, and described second object is bronchus.
The method of operating of radiographic apparatus the most according to claim 9, it is characterised in that
The each bronchial shooting angle of tumor vicinity described in described radiographic apparatus computing, controls
Make thus shoot with corresponding described shooting angle according to the priority predetermined.
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| JP2015122806A JP6577257B2 (en) | 2015-06-18 | 2015-06-18 | X-ray diagnostic apparatus and operation method thereof |
| JP2015-122806 | 2015-06-18 |
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| CN110946597B (en) * | 2018-09-27 | 2023-09-26 | 上海西门子医疗器械有限公司 | X-ray photographing apparatus and method |
| CN109378048B (en) * | 2018-12-06 | 2022-09-23 | 孟令红 | Radiation dose analysis system |
| US11357466B2 (en) | 2019-10-02 | 2022-06-14 | Canon Medical Systems Corporation | X-ray diagnosis apparatus |
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| JP2017006244A (en) | 2017-01-12 |
| JP6577257B2 (en) | 2019-09-18 |
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