CN104856714A - CT scanning parameter indication method and device and CT machine - Google Patents
CT scanning parameter indication method and device and CT machine Download PDFInfo
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- CN104856714A CN104856714A CN201410059062.XA CN201410059062A CN104856714A CN 104856714 A CN104856714 A CN 104856714A CN 201410059062 A CN201410059062 A CN 201410059062A CN 104856714 A CN104856714 A CN 104856714A
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Abstract
The invention discloses a CT scanning parameter indication method and device and a CT machine. The method includes the steps of building an X-ray detector display model, wherein the X-ray detector display model has a Z-direction width; and when a scanning parameter corresponding to a Z-direction collimation width is determined, marking a corresponding Z-direction detector range on the Z-direction width in the X-ray detector display model. According to the technical scheme, the efficiency and the accuracy for selecting the CT scanning parameter can be improved, and the conditions of low image quality caused by inappropriate selection of the CT scanning parameter are reduced.
Description
Technical field
The present invention relates to X-ray imaging device fields, particularly a kind of CT scan parameter indicating means, device and CT machine.
Background technology
Computer X-ray fault imaging (computed tomography, CT) machine is widely used in medicine and hygiene fields as a kind of armarium and carries out imaging to assist a physician to the health of patient.The sweep test of CT machine mainly comprises the X-ray bulb as x-ray source, the X-ray that X-ray bulb sends is constrained to the collimator of fan-shaped x-ray beam and the x-ray detector as X-ray receptor of different number by the constraint hole by self (being generally the approximate rectangular hole of long narrow shape).When X-ray beam after collimator constraint scans selected scanning slice, its intensity produces corresponding absorption and decay because of the tissue interaction with object to be detected different densities.The X-ray signal collected is converted to picture signal by x-ray detector, and the picture signal after conversion is exported to equipment for reconstructing image and carried out image reconstruction.
X-ray bulb, collimator and x-ray detector are arranged on the rotary frame of CT machine.Under normal circumstances, horizontal direction examinating couch being entered the rotary frame of CT machine is called Z-direction, i.e. system axial.In addition, direction perpendicular to the ground is called Y-direction, and X-direction will be called with Y-direction and the perpendicular horizontal direction of Z-direction respectively.The different Z-direction detector regimes of the corresponding x-ray detector of different Z-direction collimation width of collimator.
Before carrying out actual scanning, operator (as doctor) is needed first to determine related scans parameter.In these related scans parameters, just have a collimator parameter (Slice Collimation) representing Z-direction collimation width, this collimator parameter is typically expressed as the combination parameter form of a × b, and such as 32 × 0.6,4 × 0.6,12 × 1.2 etc.Wherein, a represents the number of plies that scanning adopts, and b represents the thickness of scanning, and a × b represents the Z-direction collimation width scanning and choose, and is also Z-direction detector regimes.
When specifically determining this combination parameter, operator normally selects a combination parameter in existing some combination parameter values.For the x-ray detector of one 16 row, from 4 × 0.6, in 12 × 0.6,16 × 0.6,4 × 1.2,12 × 1.2,16 × 1.2 values such as combination parameter such as grade, a combination parameter can be selected.But in practical application, because the concrete meaning understanding this combination parameter not only needs to understand certain CT rudimentary knowledge, and for different types, the meaning that this combination parameter is expressed may be not identical yet, and therefore some operator may not understand the concrete meaning of this combination parameter when selecting this sweep parameter.In theory, when needing the focus adopting higher spatial resolution to go observation and comparison little, need to adopt less Z-direction collimation width (as 4 × 0.6), and when scanner section bit comparison is long, during as thorax abdomen, then need to adopt larger Z-direction collimation width (as 32 × 0.6).Therefore whether select suitable collimator parameter, can have a great impact the picture quality of CT scan.But when not understanding the concrete meaning of above-mentioned collimator parameter, by sweep time and final picture quality, operator can only judge whether this parameter is selected suitable.
Summary of the invention
In view of this, one aspect of the present invention proposes a kind of CT scan parameter indicating means, propose a kind of CT scan parameter indicating device and CT machine on the other hand, in order to improve the efficiency and accuracy of selecting CT scan parameter, reduce the situation causing picture quality lower because CT scan Selecting parameter is improper and occur.
The CT scan parameter indicating means proposed in the present invention, comprising: set up an x-ray detector display model, and described x-ray detector display model has Z-direction width; When the sweep parameter of a corresponding Z-direction collimation width is determined, the Z-direction width in described x-ray detector display model indicates corresponding Z-direction detector regimes.
In one embodiment, described x-ray detector display model shows the x-ray detector submodule being arranged in Z-direction; Described Z-direction width in x-ray detector display model indicating corresponding Z-direction detector regimes is: by selecting the x-ray detector submodule of corresponding number to indicate corresponding Z-direction detector regimes in described x-ray detector display model.
In one embodiment, the sweep parameter of described corresponding Z-direction collimation width adopts the combination parameter form of a × b to represent, wherein, a represents the number of plies that scanning adopts, and b represents the thickness of scanning.
In one embodiment, the described Z-direction detector regimes by selecting the x-ray detector submodule of corresponding number to indicate correspondence is: the x-ray detector submodule belonging to same layer is adopted identical color marking, the x-ray detector submodule of adjacent two layers is adopted different color markings respectively.
A kind of CT scan parameter indicating device that the present invention proposes, comprising: x-ray detector display model, described x-ray detector display model has Z-direction width; With check processing module, for when the sweep parameter of a corresponding Z-direction collimation width is determined, the Z-direction width in described x-ray detector display model indicates corresponding Z-direction detector regimes.
In one embodiment, described x-ray detector display model shows the x-ray detector submodule being arranged in Z-direction; Described check processing module is used in described x-ray detector display model by selecting the x-ray detector submodule of corresponding number to indicate corresponding Z-direction detector regimes.
In one embodiment, the sweep parameter of described corresponding Z-direction collimation width adopts the combination parameter form of a × b to represent, wherein, a represents the number of plies that scanning adopts, and b represents the thickness of scanning; The x-ray detector submodule belonging to same layer is adopted identical color marking by described check processing module, and the x-ray detector submodule of adjacent two layers is adopted different color markings respectively.
A kind of CT machine that the present invention proposes, comprises the CT scan parameter indicating device of above-mentioned arbitrary specific implementation form.
As can be seen from such scheme, owing to establishing the x-ray detector display model that has Z-direction width in the present invention, and when the sweep parameter of a corresponding Z-direction collimation width is determined, the Z-direction width in described x-ray detector display model indicates corresponding Z-direction detector regimes.Thus user can be made to understand the practical significance of selected sweep parameter more intuitively, user is known, and whether the sweep parameter of selection roughly meets the requirements, thus improve selection CT scan parameter efficiency and accuracy, decrease the situation causing picture quality lower because CT scan Selecting parameter is improper and occur.In addition, due to when determining sweep parameter, except containing the concept of a thickness in the sweep parameter of this corresponding Z-direction collimation width, also the thickness parameter of an image reconstruction is had when image reconstruction, by arranging this x-ray detector display model in the present invention, also user can be made to obscure be respectively used to the thickness parameter scanning and rebuild, further increase the efficiency and accuracy of selecting CT scan parameter.
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 exemplary process diagram of CT scan parameter indicating means in the embodiment of the present invention.
Fig. 2 a and Fig. 2 b is two schematic diagrams of the x-ray detector display model in one embodiment of the present invention.
Fig. 3 a and Fig. 3 b is a schematic diagram of the x-ray detector display model in another embodiment of the present invention.
Fig. 4 is the exemplary block diagram of CT scan parameter indicating device in the embodiment of the present invention.
Fig. 5 a and Fig. 5 b shows the schematic diagram of the parameter setting apparatus of the CT machine in the present invention's example.
Wherein, Reference numeral is as follows:
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 exemplary process diagram of CT scan parameter indicating means in the embodiment of the present invention.As shown in Figure 1, the method can comprise following operation.
Step 101, sets up an x-ray detector display model, and described x-ray detector display model has Z-direction width.
Fig. 2 a and Fig. 2 b is two schematic diagrams of the x-ray detector display model in one embodiment of the present invention, and as shown in Figure 2 a, this x-ray detector display model adopts a two-dimentional strip pattern to represent.As shown in Figure 2 b, this x-ray detector display model also can adopt a three-dimensional cuboid pattern to represent.
Step 102, when detecting that the one scan parameter of corresponding Z-direction collimation width is selected, the Z-direction width in described x-ray detector display model indicates corresponding Z-direction detector regimes.
As shown in Figure 2 a and 2 b, when in elected, corresponding Z-direction collimates the one scan parameter of width, by filling different colors to indicate corresponding Z-direction detector regimes in the respective regions in described x-ray detector display model.Certainly, also corresponding Z-direction detector regimes can be indicated by the mode that mark is interval.
In addition, consider that x-ray detector generally includes at least two detector modules arranged in parallel in X direction, each detector module is made up of 2N the detector submodule arranged in parallel along Z-direction, each detector submodule has certain Z-direction width, the detector submodule of some x-ray detector is wide, as some 64 row's x-ray detector; The detector submodule of some x-ray detector is not wide, as 16 row's x-ray detectors, the x-ray detector of some 16 row can comprise 24 detector submodules, wherein narrower detector submodule has 16, wider detector submodule has 8, two narrower detector submodules can merge into a wider detector submodule, thus are equivalent to have 16 wider detector submodules.Wherein, N be more than or equal to 1 integer, such as N is 8,12,16,32 etc.
For the collimator parameter utilizing the combination parameter form of a × b to represent, wherein, a represents the number of plies that scanning adopts, b represents the thickness of scanning, due to for the narrower detector submodule of Z-direction width, a layer (slice) may be formed by two detector submodules, for the detector submodule of Z-direction wider width, a layer may be formed by a detector submodule, also be, the detector submodule of the corresponding different number of different thickness b, therefore in fact refer to by the determined Z-direction detector regimes of a × b the Z-direction investigative range that several detector submodules are formed.In another embodiment of therefore the present embodiment, the x-ray detector submodule of Z-direction can be arranged in shown in x-ray detector display model.Correspondingly, described Z-direction width in x-ray detector display model indicating corresponding Z-direction detector regimes can be: by selecting the x-ray detector submodule of corresponding number to indicate corresponding Z-direction detector regimes in described x-ray detector display model.
For 16 row's x-ray detectors, x-ray detector display model as shown in Figure 3 a and Figure 3 b shows can be set, when 12 × 1.2 Z-directions represented collimate width in elected, corresponding Z-direction detector regimes can be indicated as shown in Figure 3 a; When 4 × 0.6 Z-directions represented collimate width in elected, corresponding Z-direction detector regimes can be indicated as shown in Figure 3 b.
In Fig. 3 a and Fig. 3 b, when indicating corresponding Z-direction detector regimes, the x-ray detector submodule belonging to same layer can be adopted identical color marking, the x-ray detector submodule of adjacent two layers is adopted different color markings respectively, and namely whole Z-direction detector regimes indicates by different color interval.Certainly, in practical application, the whole Z-direction detector regimes of color marking that unified also can be adopted.Wherein, the color adopted can be the color of different gray scale, also can be different colours.Or when indicating corresponding Z-direction detector regimes, also can adopt and being different from Fig. 3 a and the marking mode shown in Fig. 3 b, concrete which kind of marking mode of employing, does not limit it in the present invention.
Fig. 4 is the exemplary block diagram of CT scan parameter indicating device in the embodiment of the present invention.As shown in Figure 4, this device can comprise x-ray detector display model 401 and a check processing module 402.
Wherein, x-ray detector display model 401 has Z-direction width.
Check processing module 402, for when detecting that the one scan parameter of corresponding Z-direction collimation width is selected, the Z-direction width in x-ray detector display model 401 indicates corresponding Z-direction detector regimes.
In the present embodiment, the x-ray detector submodule being arranged in Z-direction can be shown in x-ray detector display model 401.Correspondingly, check processing module 402 is used in described x-ray detector display model by selecting the x-ray detector submodule of corresponding number to indicate corresponding Z-direction detector regimes.
In the present embodiment, the x-ray detector submodule belonging to same layer can be adopted identical color marking by check processing module 402, and the x-ray detector submodule of adjacent two layers is adopted different color markings respectively.
The CT machine proposed in the present invention, can comprise the CT scan parameter indicating device of above-mentioned arbitrary specific implementation form.
Fig. 5 a and Fig. 5 b shows the schematic diagram of the parameter setting apparatus of the CT machine in the present invention's example.As shown in Figure 5 a, there is a sweep parameter in this parameter setting apparatus module is set, module is set by this sweep parameter each relevant parameter comprising Z-direction collimation width can be set.As shown in figure 5a and 5b, module is set in sweep parameter and comprises one the 16 x-ray detector display model arranged, the x-ray detector submodule being arranged in Z-direction has been shown in this x-ray detector display model.As shown in Figure 5 a, when the parameter value 12 × 1.2 of corresponding Z-direction collimation width is selected, corresponding Z-direction detector regimes is indicated in this x-ray detector display model, now, adjacent two narrower x-ray detector submodules form a layer, choose the x-ray detector submodule of 12 layer correspondences to indicate corresponding Z-direction detector regimes by adopting different colors.As shown in Figure 5 b, when the parameter value 16 × 0.6 of corresponding Z-direction collimation width is selected, corresponding Z-direction detector regimes is indicated in this x-ray detector display model, now, each narrower x-ray detector submodule forms a layer, chooses the x-ray detector submodule of 16 layer correspondences to indicate corresponding Z-direction detector regimes by adopting different colors.
Present invention also offers a kind of machine-readable storage medium, storing the instruction for making a machine perform CT scan parameter indicating means as described herein.Particularly, the system or device of being furnished with storage medium can be provided, store the software program code of the function realizing any embodiment in above-described embodiment on the storage medium, and make the computer of this system or device (or CPU or MPU) read and perform the program code be stored in storage medium.
In this case, can realize the function of any one embodiment above-described embodiment from the program code of storage medium reading itself, therefore program code and program code stored storage medium constitute a part of the present invention.
Floppy disk, hard disk, magneto-optic disk, CD (as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), tape, Nonvolatile memory card and ROM is comprised for providing the storage medium embodiment of program code.Selectively, can by communication network from download program code server computer.
In addition, be noted that, not only can by performing the program code read-out by computer, and by making the operating system etc. of calculating hands-operation carry out practical operation partly or completely based on the instruction of program code, thus the function of any one embodiment in above-described embodiment can be realized.
In addition, be understandable that, in the memorizer program code read by storage medium being write in memorizer set in the expansion board inserted in computer or arrange in writing the expanding element that is connected with computer, instruction subsequently based on program code makes the CPU etc. be arranged on expansion board or expanding element perform part and whole practical operation, thus realizes the function of any embodiment in above-described embodiment.
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 (8)
1. a CT scan parameter indicating means, comprising:
Set up an x-ray detector display model, described x-ray detector display model has Z-direction width;
When the sweep parameter of a corresponding Z-direction collimation width is determined, the Z-direction width in described x-ray detector display model indicates corresponding Z-direction detector regimes.
2. method according to claim 1, is characterized in that, described x-ray detector display model shows the x-ray detector submodule being arranged in Z-direction;
Described Z-direction width in x-ray detector display model indicating corresponding Z-direction detector regimes is: by selecting the x-ray detector submodule of corresponding number to indicate corresponding Z-direction detector regimes in described x-ray detector display model.
3. method according to claim 2, is characterized in that, the sweep parameter of described corresponding Z-direction collimation width adopts the combination parameter form of a × b to represent, wherein, a represents the number of plies that scanning adopts, and b represents the thickness of scanning.
4. method according to claim 3, it is characterized in that, the described Z-direction detector regimes by selecting the x-ray detector submodule of corresponding number to indicate correspondence is: the x-ray detector submodule belonging to same layer is adopted identical color marking, the x-ray detector submodule of adjacent two layers is adopted different color markings respectively.
5. a CT scan parameter indicating device, comprising:
X-ray detector display model, described x-ray detector display model has Z-direction width; With
Check processing module, for when the sweep parameter of a corresponding Z-direction collimation width is determined, the Z-direction width in described x-ray detector display model indicates corresponding Z-direction detector regimes.
6. device according to claim 5, is characterized in that, described x-ray detector display model shows the x-ray detector submodule being arranged in Z-direction;
Described check processing module is used in described x-ray detector display model by selecting the x-ray detector submodule of corresponding number to indicate corresponding Z-direction detector regimes.
7. device according to claim 6, is characterized in that, the sweep parameter of described corresponding Z-direction collimation width adopts the combination parameter form of a × b to represent, wherein, a represents the number of plies that scanning adopts, and b represents the thickness of scanning;
The x-ray detector submodule belonging to same layer is adopted identical color marking by described check processing module, and the x-ray detector submodule of adjacent two layers is adopted different color markings respectively.
8. a CT machine, comprises the CT scan parameter indicating device according to any one of claim 5 to 7.
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Application publication date: 20150826 |