CN105433971A - Computed tomography method and device - Google Patents
Computed tomography method and device Download PDFInfo
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- CN105433971A CN105433971A CN201410366795.8A CN201410366795A CN105433971A CN 105433971 A CN105433971 A CN 105433971A CN 201410366795 A CN201410366795 A CN 201410366795A CN 105433971 A CN105433971 A CN 105433971A
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Abstract
The invention discloses a computed tomography method and device. According to the first aspect of the invention, the computed tomography method comprises: scanning scout views for obtaining a scout view; receiving at least one reconstruction range on the scout view; determining a helical scan range on the basis of the reconstruction range; performing helical scanning in the helical scan range; performing reconstruction of cross-section image within the reconstruction range. Thus, reconstruction of cross-section image in the whole helical scan range is avoided so that the work flow is simplified and the check time is shortened.
Description
Technical field
The present invention relates to medical image, particularly computed tomography.
Background technology
CT equipment is through being usually used in scanning spinal column and vertebra.Current step is: location picture scanning; Location picture determines the scope of sequence scanning and the angle of rack inclining; Make sequence scanning successively.Sequence scanning be the movement of examinating couch different from the rotation sweep of X-ray tube time the tomoscan mode of carrying out.When making spine scan with above-mentioned steps, after the sequence scanning completing a scope, doctor needs to pin a button and examinating couch is moved to next position, after in place, according to the prompting of CT equipment, again pin this button to the frame that tilts, and then do the sequence scanning of current location.And the inclination of frame needs the longer time usually, therefore easily cause doctor's hand fatigue, and reduce the handling capacity of CT equipment.
Prior art is improved above step, and the step after improvement is as follows: position picture scanning and helical scanning, during helical scanning, frame does not tilt; Make 3D to spinal column to rebuild, detect and show the anatomical structure of spinal column; Reconstruction scope determined by the anatomical structure view of spinal column; Faultage image is rebuild within the scope of this reconstruction.But the anatomical structure detecting spinal column will spend the regular hour usually.In addition, sometimes doctor only pays close attention to several joint spinal column, but the software of CT equipment detects the anatomical structure of spinal column in whole scanning area.
Summary of the invention
In view of this, the present invention proposes a kind of computed tomography method and equipment, in order to improve the handling capacity of CT equipment.
According to a first aspect of the invention, a kind of computed tomography method is provided, comprises: position picture scanning, to obtain a location picture; Be received in described location as at least one upper reconstruction scope; A helical scanning scope is determined according to described reconstruction scope; Helical scanning is carried out in described helical scanning scope; Faultage image is rebuild within the scope of described reconstruction.Like this, can avoid rebuilding image within the scope of whole helical scanning, thus simplify workflow, shorten the review time.
In one embodiment, described helical scanning scope surrounds described reconstruction scope.Like this, can guarantee that the organ in reconstruction scope obtains tomoscan.
In one embodiment, described helical scanning scope except described reconstruction scope described helical scanning extent parallel on the both sides of the direct of travel of helical scanning, along another two edge directions of described helical scanning scope projection between part except carry out helical scanning with low dosage.Like this, unnecessary dosage can be reduced.
In one embodiment, before receiving at least one the reconstruction scope on the picture of described location, described method comprises: detect an organ according to described location picture and show described organ on the picture of described location.Like this, doctor can be helped to determine reconstruction scope.
In one embodiment, described method comprises: setting corresponds to reconstruction parameter and/or the helical scanning parameter of described reconstruction scope.Like this, doctor can be optimized the reconstruction parameter of each reconstruction scope and/or helical scanning parameter.
According to a second aspect of the invention, provide a kind of ct apparatus, comprising: one scan unit, it positions picture scanning, to obtain a location picture; One rebuilds range reception unit, and it is received in described location as at least one upper reconstruction scope; One helical scanning scope determining unit, it determines a helical scanning scope according to described reconstruction scope; Described scanning element carries out helical scanning in described helical scanning scope further; One tomographic image reconstructing unit, it rebuilds faultage image within the scope of described reconstruction.Like this, can avoid rebuilding image within the scope of whole helical scanning, thus simplify workflow, shorten the review time.
In one embodiment, described helical scanning scope surrounds described reconstruction scope.Like this, can guarantee that the organ in reconstruction scope obtains tomoscan.
In one embodiment, described scanning element to described helical scanning scope except described reconstruction scope described helical scanning extent parallel on the both sides of X-ray tube direction of rotation, along another two edge directions of described helical scanning scope projection between part except carry out helical scanning with low dosage.Like this, unnecessary dosage can be reduced.
In one embodiment, described ct apparatus also comprises an organ and detects and display unit, and it detects an organ according to described location picture and show described organ on the picture of described location.Like this, doctor can be helped to determine reconstruction scope.
In one embodiment, described ct apparatus also comprises a reconstruction parameter setup unit and/or a helical scanning parameter setting unit, and described reconstruction parameter setup unit and described helical scanning parameter setting unit set reconstruction parameter corresponding to described reconstruction scope and helical scanning parameter respectively.Like this, doctor can be optimized the reconstruction parameter of each reconstruction scope and/or helical scanning parameter.
Computed tomography method of the present invention and equipment can simplify workflow, shorten the review time.To arrange everywhere in helical scanning scope different sweep parameters can reduce detected object accept radiation dose.
Accompanying drawing explanation
The preferred embodiments of the present invention will be described in detail by referring to accompanying drawing below, the person of ordinary skill in the art is more clear that above-mentioned and other feature and advantage of the present invention, in accompanying drawing:
Fig. 1 is the schematic flow sheet of the computed tomography method according to the first embodiment of the present invention.
The schematic diagram of the location picture that Fig. 2 obtains for the method shown in Fig. 1.
Fig. 3 is for the location shown in Fig. 2 is as the schematic diagram of upper reconstruction scope.
The schematic diagram of the helical scanning scope that Fig. 4 determines for the reconstruction scope according to Fig. 3.
Fig. 5 is the schematic block diagram of ct apparatus according to a second embodiment of the present invention.
In above-mentioned accompanying drawing, the Reference numeral adopted is as follows:
10 computed tomography method 206 rebuild range reception unit
S102、S104、S106、
S108, S110, S112, step 208 helical scanning scope determining unit
S114、S116
200 ct apparatus 210 helical scanning parameter setting unit
202 scanning element 214 reconstruction parameter setup units
204 organs detect and display unit 216 tomographic image reconstructing unit
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, the present invention is described in more detail by the following examples.
Fig. 1 is the schematic flow sheet of the computed tomography method 10 according to the first embodiment of the present invention.Computed tomography method 10 comprises step S102, step S106, step S108, step S112 and step S116.
Step S102: position picture scanning, to obtain a location picture.Fig. 2 is the schematic diagram of the location picture that step S102 obtains, and shows spinal column in figure.In the present invention, Z-direction be Scan orientation as time examinating couch movement direction, the direction that when being also helical scanning, spiral is advanced.
Step S106: be received in location as at least one upper reconstruction scope.Fig. 3 is for the location shown in Fig. 2 is as the schematic diagram of upper reconstruction scope.In the present embodiment, location picture has three reconstruction scopes, these reconstruction scopes are that doctor determines according to the needs checked and is input to the CT equipment of implementation method 10.
Step S108: determine a helical scanning scope according to reconstruction scope." determine a helical scanning scope according to reconstruction scope " should be interpreted as: the CT equipment of implementation method 10 determines a helical scanning scope automatically according to reconstruction scope; Or the CT equipment of implementation method 10 receives by doctor according to the determined helical scanning scope of reconstruction scope.This helical scanning scope has a 2-d reconstruction task and corresponds to the three-dimensional reconstruction task of each reconstruction scope.The schematic diagram of the helical scanning scope that Fig. 4 determines for the reconstruction scope according to Fig. 3.As shown in Figure 4, helical scanning scope surrounds reconstruction scope.
Step S112: carry out helical scanning in helical scanning scope.In the present embodiment, helical scanning scope is a rectangle.In the present embodiment, helical scanning scope except reconstruction scope at the direct of travel of helical scanning extent parallel in helical scanning---i.e. Z-direction---both sides on, along another two edge directions of helical scanning scope projection between part except carry out helical scanning with low dosage.The left side of Fig. 4 schematically illustrates the size of the dosage d of diverse location, and helical scanning extent parallel is the right and left of parallelogram maximum in figure in the both sides of the direct of travel of helical scanning.So just can reduce the radiation that the uninterested position of doctor accepts.
Step 116: rebuild faultage image within the scope of reconstruction.
Preferably, before step S106, method 10 also comprises step S104.In step S104, detect an organ according to location picture and show this organ on the picture of location.Such as, when carrying out the inspection of vertebra or intervertebral disc, the method recorded in SSME CN102018525B patent can be adopted.Doctor can be facilitated like this on the picture of location to select reconstruction scope.
Preferably, method 10 also comprises one or two in step S110 and step S114.In step s 110, setting corresponds to the helical scanning parameter of reconstruction scope.In step S112, just can rebuild the tomography at scope place like this with corresponding helical scanning parameter scanning, such as mentioned abovely use different dosage in z-direction.In step S114, setting corresponds to the reconstruction parameter of reconstruction scope.
Fig. 5 is the schematic block diagram of ct apparatus 200 according to a second embodiment of the present invention.Ct apparatus 200 comprises one scan unit 202, and rebuilds range reception unit 206, helical scanning scope determining unit 208 and a tomographic image reconstructing unit 216.
Scanning element 202 positions picture scanning, to obtain a location picture.Fig. 2 is the schematic diagram of the location picture that scanning element 202 obtains, and shows spinal column in figure.
Rebuild range reception unit 206 and be received in location as at least one upper reconstruction scope.Fig. 3 is for the location shown in Fig. 2 is as the schematic diagram of upper reconstruction scope.In the present embodiment, location picture has three reconstruction scopes, these reconstruction scopes are that doctor determines according to the needs checked and is input to ct apparatus 200.
Helical scanning scope determining unit 208 determines a helical scanning scope according to reconstruction scope." determine a helical scanning scope according to reconstruction scope " should be interpreted as: helical scanning scope determining unit 208 determines a helical scanning scope automatically according to reconstruction scope; Or helical scanning scope determining unit 208 receives by doctor according to the determined helical scanning scope of reconstruction scope.This helical scanning scope has a 2-d reconstruction task and corresponds to the three-dimensional reconstruction task of each reconstruction scope.The schematic diagram of the helical scanning scope that Fig. 4 determines for the reconstruction scope according to Fig. 3.As shown in Figure 4, helical scanning scope surrounds reconstruction scope.
Scanning element 202 also carries out helical scanning in helical scanning scope.In the present embodiment, helical scanning scope is a rectangle.In the present embodiment, helical scanning scope except reconstruction scope at the direct of travel of helical scanning extent parallel in helical scanning---i.e. Z-direction---both sides on, along another two edge directions of helical scanning scope projection between part except carry out helical scanning with low dosage.The left side of Fig. 4 schematically illustrates the size of the dosage d of diverse location.So just can reduce the radiation that the uninterested position of doctor accepts.
Tomographic image reconstructing unit 216 rebuilds faultage image within the scope of reconstruction.
Ct apparatus 200 also can comprise an organ and detect and display unit 204, and it detects an organ according to location picture and show described organ on the picture of location.Organ detection obtains from scanning element 202 with display unit 204 and locates picture.Doctor can be facilitated like this on the picture of location to select reconstruction scope.
Preferably, ct apparatus 200 also comprises one or two in helical scanning parameter setting unit 210 and reconstruction parameter setup unit 214.Helical scanning parameter setting unit 210 sets the helical scanning parameter corresponding to reconstruction scope.Such scanning element 202 just can rebuild the tomography at scope place with corresponding helical scanning parameter scanning, such as mentioned abovely use different dosage in z-direction.Reconstruction parameter setup unit 214 sets the reconstruction parameter corresponding to reconstruction scope.
Computed tomography method of the present invention and equipment can simplify workflow, shorten the review time.To arrange everywhere in helical scanning scope different sweep parameters can reduce detected object accept radiation dose.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a computed tomography method, comprising:
S102. picture scanning is positioned, to obtain a location picture;
S106. described location is received in as at least one upper reconstruction scope;
S108. a helical scanning scope is determined according to described reconstruction scope;
S112. helical scanning is carried out in described helical scanning scope;
S116. within the scope of described reconstruction, faultage image is rebuild.
2. the method for claim 1, is characterized in that, described helical scanning scope surrounds described reconstruction scope.
3. the method for claim 1, it is characterized in that, described helical scanning scope except described reconstruction scope described helical scanning extent parallel on the both sides of the direct of travel of helical scanning, along another two edge directions of described helical scanning scope projection between part except carry out helical scanning with low dosage.
4. the method for claim 1, is characterized in that, before receiving at least one the reconstruction scope on the picture of described location, described method comprises:
S104. detect an organ according to described location picture and show described organ on the picture of described location.
5. the method for claim 1, is characterized in that, described method comprises:
S110. setting corresponds to the helical scanning parameter of described reconstruction scope; And/or
S114. setting corresponds to the reconstruction parameter of described reconstruction scope.
6. a ct apparatus, comprising:
One scan unit (202), it positions picture scanning, to obtain a location picture;
One rebuilds range reception unit (206), and it is received in described location as at least one upper reconstruction scope;
One helical scanning scope determining unit (208), it determines a helical scanning scope according to described reconstruction scope;
Described scanning element (202) carries out helical scanning in described helical scanning scope further;
One tomographic image reconstructing unit (216), it rebuilds faultage image within the scope of described reconstruction.
7. ct apparatus as claimed in claim 6, it is characterized in that, described helical scanning scope surrounds described reconstruction scope.
8. ct apparatus as claimed in claim 6, it is characterized in that, described scanning element (202) to described helical scanning scope except described reconstruction scope described helical scanning extent parallel on the both sides of the direct of travel of helical scanning, along another two edge directions of described helical scanning scope projection between part except carry out helical scanning with low dosage.
9. ct apparatus as claimed in claim 6, it is characterized in that, described ct apparatus (200) also comprises an organ and detects and display unit (204), and it detects an organ according to described location picture and show described organ on the picture of described location.
10. ct apparatus as claimed in claim 6, it is characterized in that, described ct apparatus (200) also comprises a helical scanning parameter setting unit (210) and/or a reconstruction parameter setup unit (214), and described reconstruction parameter setup unit and described helical scanning parameter setting unit set reconstruction parameter corresponding to described reconstruction scope and helical scanning parameter respectively.
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| WO2018121781A1 (en) * | 2016-12-30 | 2018-07-05 | Shenzhen United Imaging Healthcare Co., Ltd. | Imaging method and system |
| CN109363695A (en) * | 2018-09-30 | 2019-02-22 | 上海联影医疗科技有限公司 | A kind of imaging method and system |
| WO2019120196A1 (en) * | 2017-12-18 | 2019-06-27 | Shenzhen United Imaging Healthcare Co., Ltd. | Systems and methods for determining scanning parameter in imaging |
| CN110327069A (en) * | 2019-07-01 | 2019-10-15 | 赛诺威盛科技（北京）有限公司 | A method of reducing CT helical scanning range |
| CN111557732A (en) * | 2020-05-06 | 2020-08-21 | 重庆市九龙坡区中医院 | Foot arch image model reconstruction method |
| CN113545796A (en) * | 2021-07-23 | 2021-10-26 | 西北农林科技大学 | Method for detecting pork quality character by using computer tomography scanning living body |
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| WO2018121781A1 (en) * | 2016-12-30 | 2018-07-05 | Shenzhen United Imaging Healthcare Co., Ltd. | Imaging method and system |
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| CN111557732A (en) * | 2020-05-06 | 2020-08-21 | 重庆市九龙坡区中医院 | Foot arch image model reconstruction method |
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| CN113545796A (en) * | 2021-07-23 | 2021-10-26 | 西北农林科技大学 | Method for detecting pork quality character by using computer tomography scanning living body |
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