CN102805636B - CT machine and method and system for determining scanning area of CT machine - Google Patents
CT machine and method and system for determining scanning area of CT machine Download PDFInfo
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- CN102805636B CN102805636B CN201110145238.XA CN201110145238A CN102805636B CN 102805636 B CN102805636 B CN 102805636B CN 201110145238 A CN201110145238 A CN 201110145238A CN 102805636 B CN102805636 B CN 102805636B
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Abstract
The invention discloses a CT (computed tomography) machine, a method and system for determining a scanning area of a CT machine, a computer program and a readable recording medium. The system comprises a coordinate setting unit used for setting a coordinate system for an examining table plate, a camera used for collecting an image of a patient, a first image processing unit used for determining an examining scope of a target organ according to the image of the patient, and a coordinate determining unit used for determining a scanning zero position of a scanning plane according to a relative distance between the zero position of the scanning plane and the examining zero position of the target organ in the coordinate system. With the adoption of the technical scheme, radiation doses on the patient can be reduced in the locating process.
Description
Technical field
The present invention relates to medical domain, particularly the sweep limits defining method of a kind of computed tomography (CT) machine, system and CT machine.
Background technology
As shown in Figure 1, when utilizing CT machine to carry out scanning imagery to human body, patient 101 is needed to be placed on the bed board 1021 of patient table 102, by mobile bed board 1021, the scanning area that patient 101 horizontal positioned sends into CT frame 103 just can be carried out scanography, when carrying out scanography, generally include two stages, first stage is location scanning (toposcan) stage, also it is the determination stage of sweep limits, for determining the angle of inclination of the original position, end position and the frame (gantry) that scan.Second stage is tomoscan (tomoscan) stage, the namely real scanning imagery stage.
At present, the first stage is all the determination utilizing X-line imaging to carry out sweep limits, although the radiation dose of this X-line imaging is within safety range, the radiation dose reducing patient further is still devoted in CT machine field.
Summary of the invention
In view of this, one aspect of the present invention proposes a kind of sweep limits defining method of CT machine, propose a kind of certainty annuity and CT machine of sweep limits of CT machine on the other hand, propose a kind of computer program and computer-readable recording medium on the one hand again, in order to replace the sweep limits defining method of X-line imaging, reduce the radiation dose to patient between fixation phase.
The sweep limits defining method of CT machine proposed by the invention, comprising:
For examining table bed board setting coordinate system;
Determine the initial position of the plane of scanning motion in described coordinate system;
Utilize the positive bit image of the first camera collection patient be positioned at above patient; And/or, utilize the side bit image being positioned at the second camera collection patient of patient side;
From described positive bit image and/or described side bit image, identify the body surface identification point of Target organ, according to the examination scope of described body surface symbol point determination Target organ, described examination scope comprises inspection original position;
According to the position of described inspection original position in described coordinate system and the initial position of the described plane of scanning motion in described coordinate system, determine the scanning starting position of the plane of scanning motion.
Preferably, the method comprises further: according to the position of described side bit image determination Target organ relative to frame central.
Preferably, the method comprises further: determine to rebuild the visual field according to described positive bit image and described side bit image.
Wherein, if described Target organ is head;
The described examination scope according to described positive bit image and described side bit image determination Target organ comprises: the position identifying the crown from described positive bit image and described side bit image, determines the inspection original position of head according to the position on the described crown; The position of outer eyelid and external auditory meatus is identified, according to the angle of inclination of the line determination frame of described outer eyelid and external auditory meatus from the bit image of described side;
Or, if described Target organ is breast portion;
The described examination scope according to described positive bit image and described side bit image determination Target organ comprises: the position identifying clavicle from described positive bit image, determines the inspection original position of chest according to the position of described clavicle.
Preferably, described first photographic head and described second camera are full-view camera; Before the described examination scope according to described positive bit image and/or described side bit image determination Target organ, comprise further: the positive bit image by the normotopia image reconstruction of described first camera collection being the plan view of applicable human eye, the side bit image gathered by described second camera is reconstructed into the side bit image of the plan view of applicable human eye.
The sweep limits certainty annuity of CT machine proposed by the invention, described CT machine comprises examining table bed board; This system comprises:
Coordinate setting unit, for being examining table bed board setting coordinate system;
Be positioned at the first photographic head above patient, for gathering the positive bit image of patient;
Be positioned at the second camera of patient side, for gathering the side bit image of patient;
First graphics processing unit, for identifying the body surface identification point of Target organ from described positive bit image and/or described side bit image, according to the examination scope of described body surface symbol point determination Target organ, described examination scope comprises inspection original position;
Coordinate determining unit, for determining the initial position of the plane of scanning motion in described coordinate system; According to the position of described inspection original position in described coordinate system and the initial position of the described plane of scanning motion in described coordinate system, determine the scanning starting position of the plane of scanning motion.
Preferably, described first graphics processing unit is further used for according to the position of described side bit image determination Target organ relative to CT machine frame central.
Preferably, described first graphics processing unit is further used for determining to rebuild the visual field according to described positive bit image and described side bit image.
Preferably, described first photographic head and described second camera are full-view camera; This system comprises further:
Second graphics processing unit, for by the normotopia image reconstruction of described first camera collection being the positive bit image of the plan view of applicable human eye, and exports to the first graphics processing unit by the positive bit image after reconstruct; The side bit image gathered by described second camera is reconstructed into the side bit image of the plan view of applicable human eye, and the side bit image after reconstruct is exported to the first graphics processing unit.
CT machine proposed by the invention, comprising: the sweep limits certainty annuity of the CT machine of any one specific implementation form above-mentioned.
Or CT machine proposed by the invention, also can comprise:
Be provided with the examining table bed board of coordinate system;
Be positioned at the first photographic head above patient, for gathering the positive bit image of patient;
Be positioned at the second camera of patient side, for gathering the side bit image of patient;
First graphics processing unit, for identifying the body surface identification point of Target organ from described positive bit image and/or described side bit image, according to the examination scope of described body surface symbol point determination Target organ, described examination scope comprises inspection original position;
Coordinate determining unit, for determining the initial position of the plane of scanning motion in described coordinate system; According to the position of described inspection original position in described coordinate system and the initial position of the described plane of scanning motion in described coordinate system, determine the scanning starting position of the plane of scanning motion.
Preferably, described first graphics processing unit is further used for according to the position of described side bit image determination Target organ relative to CT machine frame central.
Preferably, described first graphics processing unit is further used for determining to rebuild the visual field according to described positive bit image and described side bit image.
Preferably, described first photographic head and described second camera are full-view camera; This system comprises further:
Second graphics processing unit, for by the normotopia image reconstruction of described first camera collection being the positive bit image of the plan view of applicable human eye, and exports to the first graphics processing unit by the positive bit image after reconstruct; The side bit image gathered by described second camera is reconstructed into the side bit image of the plan view of applicable human eye, and the side bit image after reconstruct is exported to the first graphics processing unit.
Computer program proposed by the invention, when described computer program runs in a machine, can make described machine perform the method for any one specific implementation form above-mentioned.
Computer-readable recording medium proposed by the invention, stores above-mentioned computer program.
As can be seen from such scheme, because the present invention utilizes two optical cameras to gather the image of patient's normotopia and position, side respectively, and the examination scope of Target organ is determined according to the image collected, according to the coordinate system of the bed board preset, determine scanning starting position, thus achieve the determination realizing sweep limits with optical imagery replacement X-line imaging, because this reducing the radiation dose to patient between fixation phase.
In addition, the position of Target organ relative to CT frame central is determined further by utilizing this optical imagery, can reduce and manually determine the error of Target organ relative to the position of CT frame central at present, save human cost, and the whole sweep time of patient can be shortened.
Equally, determining further by utilizing this optical imagery to rebuild the visual field, the error of manually determining to rebuild the visual field at present can be reduced equally, save human cost, and the whole sweep time of patient can be shortened.
In addition, by utilizing full-view camera to gather optical imagery, can expand and gather visual angle, adding the applicability of system.
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 schematic diagram when utilizing CT machine to scan.
Fig. 2 is the schematic flow sheet of the sweep limits defining method of CT machine in the embodiment of the present invention.
Fig. 3 is the schematic diagram of two position relationships between photographic head and patient in the embodiment of the present invention.
Fig. 4 a and Fig. 4 b is when carrying out head scanning, determines the schematic diagram of HC scope from normotopia image graph 4a and side bit image Fig. 4 b.
Fig. 5 is the structural representation of the sweep limits certainty annuity of CT machine in one embodiment of the invention.
In figure: 101-patient 102-examining table 103-CT frame 1021-bed board
201-is that bed board setting coordinate system 202-determines that plane of scanning motion initial position 203-gathers optical imagery 204-and determines that examination scope 205-determines scanning starting position
301-first photographic head 302-second camera
T-crown position St-checks the outer Tg-angle of inclination, C, D-external auditory meatus position, eyelid position of original position A, B-
501-coordinate setting unit 502-first photographic head 503-second camera 504-first graphics processing unit 505-coordinate determining unit 506-second graphics processing unit
Detailed description of the invention
In the present invention, in order to reduce the radiation injury to patient between fixation phase, consideration optical imagery replaces X-line imaging to carry out the determination of sweep limits, namely the positive bit image of the first camera collection patient be positioned at above patient is utilized, utilize the side bit image being positioned at the second camera collection patient of patient side, body surface identification point afterwards by identifying Target organ in this positive bit image and/or side bit image determines the examination scope of Target organ, comprise: check original position, (as when carrying out head scanning) also comprises the angle of inclination of frame if desired, the i.e. angle of inclination of the plane of scanning motion, in addition, also can comprise inspection end position for reference.
In addition, in order to determine the plane of scanning motion and check the relative position between original position, to determine the initial sweep position of the plane of scanning motion, for examining table bed board sets a coordinate system in the present invention, and determine plane of scanning motion initial position in the coordinate system, afterwards according to the inspection original position position in the coordinate system of Target organ, determine the scanning starting position of the plane of scanning motion.
Further, also can according to according to described positive bit image and the described side bit image determination Target organ position relative to frame central in the present invention.
In addition, also can determine to rebuild the visual field according to described positive bit image and described side bit image in the present invention.
During specific implementation, above-mentioned first photographic head and second camera can be common camera, as long as can meet current angular field of view.Or, in order to expand angular field of view, above-mentioned first photographic head and second camera also can be full-view camera, now, before according to the examination scope of positive bit image and/or side bit image determination Target organ, should first by the positive bit image that the normotopia image reconstruction of described first camera collection is the plan view of applicable human eye, the side bit image gathered by described second camera is reconstructed into the side bit image of the plan view of applicable human eye.
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. 2 is the schematic flow sheet of the sweep limits defining method of CT machine in the embodiment of the present invention.As shown in Figure 2, the method comprises the steps:
Step 201 is examining table bed board setting coordinate system.
Wherein, for the coordinate system of examining table bed board setting can be marked on the coordinate system on examining table bed board, also can be the electronic coordinate system consistent with bed board image scaled, which kind of application of concrete employing can be determined according to actual needs.
This coordinate system can be the individual one-dimensional coordinate system that can identify bed board and move forward and backward, and also can be the above coordinate system of two dimension comprising this movable direction.
Step 202, determines the initial position of the plane of scanning motion in described coordinate system.
Wherein, this initial position can be an absolute position, also can be a relative position, specifically can arrange according to actual needs.
Step 203, gathers optical imagery, namely utilizes the positive bit image of the first camera collection patient be positioned at above patient, and/or, utilize the side bit image being positioned at the second camera collection patient of patient side.
Fig. 3 is the schematic diagram of two position relationships between photographic head and patient in the embodiment of the present invention.As shown in Figure 3, the first photographic head 301 is positioned at the top of patient 101, and for gathering the positive bit image of patient 101, second camera 302 is positioned at the side of patient 101, for gathering the side bit image of patient 101.
In practical application, according to the difference of the Target organ of scanning, determine that the image needed for Target organ examination scope also may be different, therefore likely only need gather wherein piece image in this step, also likely need to gather two width images simultaneously.Such as, when carrying out chest scan, only can need gather positive bit image; And when carrying out head scanning, only can need gather side bit image, or just bit image and side bit image all need to gather.
Certainly, in practical application, also can not consider specifically scan which Target organ, and all gather two width images, select again in step 204 afterwards.
Step 204, from the examination scope of described positive bit image and/or described side bit image determination Target organ, this examination scope comprises inspection original position, if carry out head scanning etc., also comprises the angle of inclination of frame.In addition, the inspection end position of reference can also be comprised in this examination scope.
Below respectively to carry out the situation of head scanning and chest scan, this step is illustrated.
Fig. 4 a and Fig. 4 b is when carrying out head scanning, determines the schematic diagram of HC scope from normotopia image graph 4a and side bit image Fig. 4 b.As shown in Figs. 4a and 4b, in this step, the position T on the crown can be identified from normotopia image graph 4a and side bit image Fig. 4 b, determine the inspection original position St of head according to the position T on the described crown; And from the bit image Fig. 4 b of side, identify position A, B of eyelid outside both sides and position C, D of both sides external auditory meatus, according to the angle of inclination Tg of the line determination frame of the position A of eyelid outside side and the position C of this side external auditory meatus.Afterwards, frame can be tilted according to this angle of inclination.During specific implementation, also only can identify the position (as A) of eyelid outside side and the position (as C) of side external auditory meatus, afterwards according to the angle of inclination Tg of the line determination frame of the position of outer eyelid identified and the position of external auditory meatus.
When Target organ is chest, in this step, the position of clavicle can be identified from described positive bit image, determine the inspection original position of chest according to the position of described clavicle.
Visible, in said process, from described positive bit image and/or described side bit image, first identify the body surface identification point of Target organ, according to the examination scope of described body surface symbol point determination Target organ.
Step 205, according to the position of described inspection original position in described coordinate system and the initial position of the described plane of scanning motion in described coordinate system, determines the scanning starting position of the plane of scanning motion.
In this step, according to the position of described inspection original position in described coordinate system and the initial position of the described plane of scanning motion in described coordinate system, the distance that bed board needs movement can be calculated, thus determine the scanning starting position of the plane of scanning motion.
Afterwards, bed board can be moved to this scanning starting position place and scan, then can judge whether scanning terminates in the scanning position corresponding to the scanogram of display in real time.Or, if be previously determined the inspection end position of reference, also can terminate scanning when scanning proceeds to this inspection end position, or not consider this inspection end position, directly judging whether to need to terminate scanning according to scanning the image obtained.
In the present embodiment, before starting scanning, according to the position of described side bit image determination Target organ relative to frame central (iso-center), and by mobile bed board, Target organ can be moved to the center of frame.Such as, according to the upper bottom profiled of side bit image determination Target organ body surface, and by mobile bed board, the center of the upper bottom profiled of Target organ body surface can be moved to the center of frame.
In the present embodiment, further, can also determine to rebuild the visual field (FOV, Field of View) according to described positive bit image and described side bit image.Such as, be the situation of foursquare FOV for visual field profile, the upper bottom profiled of current organ body surface can be determined according to side bit image, and obtain the maximum range value between bottom profiled; According to the left and right profile of positive bit image determination Target organ body surface, and obtain the maximum range value between the profile of left and right; From two maximum range value, choose the greater as the visual field length of side of rebuilding FOV, the center of Target organ can be determined according to above-mentioned upper bottom profiled and left and right profile, can determine according to the center of described Target organ the central region rebuilding FOV.
As shown in fig. 4 a, the visual field length of side of rebuilding FOV can be determined according to the maximum range value H between the upper bottom profiled of head in the maximum range value L between the left and right profile of head in positive bit image and side bit image, i.e. L.
In practical application, if the first photographic head and second camera are full-view camera, then between step 203 and step 204, comprise further: the positive bit image by the normotopia image reconstruction of described first camera collection being the plan view of applicable human eye, the side bit image gathered by described second camera is reconstructed into the side bit image of the plan view of applicable human eye.
Except the application of the head in above-mentioned example and chest, the technical scheme in the present invention can also be applied to the scanning at other position, and as the scanning of hands, foot, arm and lower limb etc., range of application is wider.
Above the sweep limits defining method of CT machine in the embodiment of the present invention is described in detail, again the sweep limits certainty annuity of CT machine in the embodiment of the present invention has been described in detail below.
Fig. 5 is the structural representation of the sweep limits certainty annuity of CT machine in one embodiment of the invention.As shown in Figure 5, this system can comprise: coordinate setting unit 501, first photographic head 502, second camera 503, first graphics processing unit 504 and coordinate determining unit 505.
Wherein, coordinate setting unit 501 is for being examining table bed board setting coordinate system.
First photographic head 502, is positioned at the top of patient, for gathering the positive bit image of patient.
Second camera 503, is positioned at the side of patient, for gathering the side bit image of patient.
First graphics processing unit 504, for identifying the body surface identification point of Target organ from described positive bit image and/or described side bit image, according to the examination scope of described body surface symbol point determination Target organ, described examination scope comprises inspection original position, if carry out head scanning etc., also comprise the angle of inclination of frame.In addition, the inspection end position of reference can also be comprised in this examination scope.Such as, when Target organ is head, first graphics processing unit 504 can identify the position on the crown from positive bit image and side bit image, the inspection original position of head is determined according to the position on the described crown, the position of outer eyelid and external auditory meatus is identified, according to the angle of inclination of the line determination frame of described outer eyelid and external auditory meatus from the bit image of side.When Target organ is chest, the first graphics processing unit 504 can identify the position of clavicle from positive bit image, determines the inspection original position of chest according to the position of described clavicle.
Coordinate determining unit 505, for determining the initial position of the plane of scanning motion in described coordinate system; According to the position of described inspection original position in described coordinate system and the initial position of the described plane of scanning motion in described coordinate system, determine the scanning starting position of the plane of scanning motion.
Further, this first graphics processing unit 504 can according to the position of bit image determination Target organ in side relative to CT machine frame central.Such as, according to the upper bottom profiled of side bit image determination Target organ body surface, and by mobile bed board, the center of the upper bottom profiled of Target organ body surface can be moved to the center of frame.
Further, the first graphics processing unit 504 can be determined to rebuild the visual field according to positive bit image and side bit image.Such as, be the situation of foursquare FOV for visual field profile, the upper bottom profiled of current organ body surface can be determined according to side bit image, and obtain the maximum range value between bottom profiled; According to the left and right profile of positive bit image determination Target organ body surface, and obtain the maximum range value between the profile of left and right; From two maximum range value, choose the greater as the visual field length of side of rebuilding FOV, the center of Target organ can be determined according to above-mentioned upper bottom profiled and left and right profile, can determine according to the center of described Target organ the central region rebuilding FOV.
In the present embodiment, when the first photographic head 502 and second camera 503 are full-view camera, this system comprises further: the second graphics processing unit 506 between photographic head and the first graphics processing unit 504, normotopia image reconstruction for being gathered by described first photographic head 502 is the positive bit image of the plan view of applicable human eye, and the positive bit image after reconstruct is exported to the first graphics processing unit 504, the side bit image that described second camera 503 gathers is reconstructed into the side bit image of the plan view of applicable human eye, and the side bit image after reconstruct is exported to the first graphics processing unit 504.
CT machine in the embodiment of the present invention can comprise the sweep limits certainty annuity of the CT machine of above-mentioned arbitrary specific implementation form.
In addition, during specific implementation, the CT machine in the embodiment of the present invention also can not comprise above-mentioned coordinate setting unit 501, but comprises the examining table bed board etc. being provided with coordinate system.Which kind of mode of concrete employing, can determine according to actual needs.
Present invention also offers a kind of machine-readable storage medium, storing the instruction for making a machine perform the sweep limits defining method of CT machine 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 invention discloses a kind of sweep limits certainty annuity of CT machine, method, CT machine, computer program and readable medium recording program performing.Wherein, system can comprise: for the coordinate setting unit for examining table bed board setting coordinate system, for gathering the photographic head of patient image, for determining the first graphics processing unit of Target organ examination scope according to patient image, for checking the coordinate determining unit of the scanning starting position of the relative distance determination plane of scanning motion of original position in described coordinate system according to the plane of scanning motion and Target organ.Technical scheme disclosed in this invention can reduce the radiation dose to patient between fixation phase.
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 (11)
1. a sweep limits certainty annuity for CT machine, described CT machine comprises examining table bed board; It is characterized in that, this system comprises:
Be positioned at the first photographic head (502) above patient, for gathering the positive bit image of patient;
Be positioned at the second camera (503) of patient side, for gathering the side bit image of patient;
First graphics processing unit (504), for identifying the body surface identification point of Target organ from described positive bit image and/or described side bit image, according to the examination scope of described body surface identification point determination Target organ, described examination scope comprises inspection original position;
Coordinate determining unit (505), for determining the initial position of the plane of scanning motion in the coordinate system of described examining table bed board; According to the position of described inspection original position in described coordinate system and the initial position of the described plane of scanning motion in described coordinate system, determine the scanning starting position of the plane of scanning motion, and described examining table bed board is moved to this scanning starting position scan.
2. system according to claim 1, is characterized in that, described first graphics processing unit (504) is further used for according to the position of described side bit image determination Target organ relative to CT machine frame central.
3. system according to claim 1, is characterized in that, described first graphics processing unit (504) is further used for determining to rebuild the visual field according to described positive bit image and described side bit image.
4. system according to any one of claim 1 to 3, is characterized in that, described first photographic head (502) and described second camera (503) are full-view camera; This system comprises further:
Second graphics processing unit (506), for by the normotopia image reconstruction of described first camera collection being the positive bit image of the plan view of applicable human eye, and exports to the first graphics processing unit by the positive bit image after reconstruct; The side bit image gathered by described second camera is reconstructed into the side bit image of the plan view of applicable human eye, and the side bit image after reconstruct is exported to the first graphics processing unit.
5. system according to claim 1, is characterized in that, this system also comprises coordinate setting unit (501), for being examining table bed board setting coordinate system.
6. a CT machine, comprises examining table bed board, it is characterized in that, this CT machine also comprises: the sweep limits certainty annuity of the CT machine according to any one of claim 1 to 5.
7. a sweep limits defining method for CT machine, it is characterized in that, the method comprises:
For examining table bed board setting coordinate system (201);
Determine the initial position of the plane of scanning motion in described coordinate system (202);
Utilize the positive bit image of the first camera collection patient be positioned at above patient; And/or, utilize the side bit image (203) being positioned at the second camera collection patient of patient side;
From described positive bit image and/or described side bit image, identify the body surface identification point of Target organ, according to the examination scope of described body surface identification point determination Target organ, described examination scope comprises inspection original position (204);
According to the position of described inspection original position in described coordinate system and the initial position of the described plane of scanning motion in described coordinate system, determine the scanning starting position (205) of the plane of scanning motion, and described examining table bed board is moved to this scanning starting position scan.
8. method according to claim 7, is characterized in that, the method comprises further: according to the position of described side bit image determination Target organ relative to frame central.
9. method according to claim 7, is characterized in that, the method comprises further: determine to rebuild the visual field according to described positive bit image and described side bit image.
10. method according to claim 9, is characterized in that, described Target organ is head; The described examination scope according to described positive bit image and described side bit image determination Target organ comprises: the position identifying the crown from described positive bit image and described side bit image, determines the inspection original position of head according to the position on the described crown; The position of outer eyelid and external auditory meatus is identified, according to the angle of inclination of the line determination frame of described outer eyelid and external auditory meatus from the bit image of described side;
Or described Target organ is breast portion; The described examination scope according to described positive bit image and described side bit image determination Target organ comprises: the position identifying clavicle from described positive bit image, determines the inspection original position of chest according to the position of described clavicle.
11. methods according to any one of claim 7 to 10, it is characterized in that, described first photographic head and described second camera are full-view camera; Before the described examination scope according to described positive bit image and/or described side bit image determination Target organ, comprise further: the positive bit image by the normotopia image reconstruction of described first camera collection being the plan view of applicable human eye, the side bit image gathered by described second camera is reconstructed into the side bit image of the plan view of applicable human eye.
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| CN201110145238.XA CN102805636B (en) | 2011-05-31 | 2011-05-31 | CT machine and method and system for determining scanning area of CT machine |
| BR102012013157A BR102012013157A2 (en) | 2011-05-31 | 2012-05-31 | Method and system for determining the scan range of a tc machine, and tc machine |
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| CN201110145238.XA CN102805636B (en) | 2011-05-31 | 2011-05-31 | CT machine and method and system for determining scanning area of CT machine |
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| CN106580356A (en) * | 2015-10-19 | 2017-04-26 | 上海西门子医疗器械有限公司 | CT machine scanning area determining method, system and CT machine |
| CN106821408B (en) * | 2017-01-04 | 2020-07-10 | 东软医疗系统股份有限公司 | Scanning method and device |
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| CN102805636A (en) | 2012-12-05 |
| BR102012013157A2 (en) | 2013-06-18 |
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