CN104771184A - CT scanning imaging method - Google Patents
CT scanning imaging method Download PDFInfo
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- CN104771184A CN104771184A CN201410018487.6A CN201410018487A CN104771184A CN 104771184 A CN104771184 A CN 104771184A CN 201410018487 A CN201410018487 A CN 201410018487A CN 104771184 A CN104771184 A CN 104771184A
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Abstract
The invention provides a CT scanning imaging method. The CT scanning imaging method includes the steps that a CT scanning device is provided, wherein the CT scanning device comprises a hospital bed which is provided with a first positioning mark and a second positioning mark; and CT positioning sheet scanning is carried out on a to-be-scanned part of a detected person through the CT scanning device to obtain a CT positioning sheet. The process for obtaining the CT positioning sheet includes the steps that the hospital bed enters a detection cavity of a rotating rack until the first positioning mark of the hospital bed enters a CT scanning area; CT positioning sheet scanning is carried out on the hospital bed carrying the detected person to obtain the CT positioning sheet with the positioning marks; the current relative bed height is obtained according to the CT positioning sheet; whether the current relative bed height meets the requirement or not is judged; if the requirement is not met, the hospital bed exits from the detection cavity of the rotating rack, the height of the hospital bed is adjusted, and the above steps are repeatedly executed until the requirement is met; and if the requirement is met, the hospital bed continuously enters the detection cavity of the rotating rack until CT positioning sheet scanning is completed to obtain the CT positioning sheet.
Description
[technical field]
The present invention relates to Computed tomography technical field, particularly relate to a kind of CT scan formation method.
[technical background]
Computed tomography (Computed tomography, being called for short CT) imaging utilizes the x-ray tomography data of computer technology to object to be detected to carry out rebuilding the technology of image, there is the advantages such as the 3-D view that imaging is quick, the density resolution of reconstruction image is high, be conveniently redeveloped into various tangent plane, be widely used in the field such as industrial detection, medical imaging at present.In medical imaging, the main third generation CT scan equipment that uses carries out CT scan imaging to detected person at present.
Third generation CT scan equipment comprise the test chamber had for detected person's turnover rotary frame, be located on rotary frame for generation of the bulb of X-ray, be located on rotary frame and the detector array be oppositely arranged with bulb, for carry detected person and can along the axial direction of test chamber pass in and out test chamber sick bed, be mounted on rotary frame and the computer be electrically connected with detector array.Detector array is for receiving the X-ray that penetrates detected person and converting the X-ray signal received to the signal of telecommunication.Computer comprises the signal received according to detector array and carries out the image reconstruction unit of image reconstruction and the image-display units for showing reconstruction image.
At present, the process of at use CT scan equipment, detected person being carried out to the CT reconstruction image of scanning acquisition detected person comprises the steps: to carry out CT spacer scanning acquisition CT spacer to detected person; The CT scan visual field and scanning position is selected according to CT spacer; According to the CT scan visual field selected and scanning position, the scanning of CT agreement is carried out to detected person and obtain initial data; Original number is corrected, resets, process of convolution obtain convolved data; Back projection's process is carried out to convolved data and obtains CT reconstruction image.In this CT scan process, detected person is carried out to the scanning of CT spacer and the sick bed height of bed of carrying out the scanning of CT agreement mainly obtain by hard ware measures such as potentiometers, directly cannot obtain the height of the misalignment frame center of rotation at the position to be scanned of the detected person be positioned on sick bed, operator adjusts the height of bed of sick bed mostly by perusal and experience, make detected person be in a proper position.But in actual applications can there are the following problems: because of detected person's bodily form, position to be scanned is different and the height of bed carrying detected person is adjusted to a certain height according to operator's perusal and experience, the center at position to be scanned can be there is far away higher than the center of rotation of rotary frame, position to be scanned is made to exceed the scan vision of CT scan, cause X-ray under the only part anglec of rotation through position to be scanned, and the X-ray under the not all anglec of rotation is through position to be scanned, and then it is imperfect to cause the position to be scanned collected to be positioned at the signal at the position outside the CT scan visual field, the image obtained after backprojection reconstruction is discontinuous with the CT value outside edge in scan vision edge, produce gibbs artifact (as shown in Figure 1), be unfavorable for the diagnosis of detected person's disease.
Therefore, necessaryly provide a kind of CT scan formation method, for overcoming the defect that prior art exists.
[summary of the invention]
The object of the present invention is to provide a kind of CT scan formation method, the height of sick bed can be adjusted to ensure that position to be scanned falls in the CT scan visual field according to the current relative height of bed obtained in spacer scanning process, avoid the reconstruction image that detected person is carrying out CT agreement scanning acquisition to occur gibbs artifact, improve picture quality.For achieving the above object, the present invention is achieved through the following technical solutions: a kind of CT scan formation method, comprise: CT scan equipment is provided, described CT scan equipment comprises the rotary frame with test chamber, relatively be located at the x-ray source on rotary frame and detector array, the computer be electrically connected with detector array and carry the sick bed that detected person in axial direction passes in and out the test chamber of rotary frame, described sick bed comprises bed board and is located at the head rest of bed board lengthwise to one end, described sick bed is provided with telltale mark, described telltale mark comprises the second telltale mark be located at first telltale mark of bed board near head rest one end Yu be located at head rest both sides, the average height of the bed board of the centre distance sick bed at position to be scanned is had in described CT scan equipment, use the to be scanned position of CT scan equipment to detected person to carry out the scanning of CT spacer and obtain CT spacer, select scan vision according to CT spacer and detected person carried out to the scanning of CT agreement to obtain original raw data, carry out image reconstruction according to original raw data and obtain CT reconstruction image, wherein, use CT scan equipment to detected person carry out process that the scanning of CT spacer obtains CT spacer comprise the steps: to make sick bed along the axial direction of test chamber enter rotary frame test chamber until sick bed bed board on the first telltale mark enter within the scope of CT scan, carrying out the scanning of CT spacer to the sick bed carrying detected person obtains containing the predetermined bit slice of specifically labelled CT, the current relative height of bed is obtained according to the predetermined bit slice of CT, judge whether the current relative height of bed meets the requirements, when the current relative height of bed is undesirable, then sick bed is made to exit the test chamber of rotary frame and adjust the height of sick bed according to the current relative height of bed and then repeat above-mentioned steps until the current relative height of bed meets the requirements, when the current relative height of bed meets the requirements, then continue to make sick bed enter the test chamber of rotary frame until the CT spacer scanning completing follow up scan scope obtains CT spacer along the axial direction of test chamber.
Preferably, described CT spacer scanning is the scanning of CT lateral projection, and described CT spacer is CT lateral projection, and the predetermined bit slice of described CT is the pre-lateral projection of CT, and the telltale mark in the pre-lateral projection of described CT is obtained by the second telltale mark of the head rest of scanning sick bed.
Preferably, the described step according to the current relative height of bed of CT pre-lateral projection acquisition comprises: the centre coordinate position (x, y) determining the second telltale mark respective pixel on the pre-lateral projection of CT; Determine the number of pixels x often gone on the pre-lateral projection of CT
0; Determine the actual range d that each pixel represents
0; According to the number of pixels x often gone on the pre-lateral projection of CT
0obtain the coordinate of the pixel column on the median vertical line of the image on the pre-lateral projection of CT; Pixel distance d between the center obtaining the second telltale mark respective pixel according to the coordinate of the pixel column coordinate on the median vertical line of the image on the pre-lateral projection of CT and the second telltale mark respective pixel to image median vertical line
x; According to the pixel distance d between the center of the second telltale mark respective pixel to image median vertical line
xthe actual range d represented with each pixel
0obtain current relative height of bed h.
Preferably, described current relative height of bed h is by by the pixel distance d between the center of the second telltale mark respective pixel to image median vertical line
xthe actual range d represented with each pixel
0do product process obtain.
Preferably, the actual range d of described each pixel representative
0determined by following formula:
D
0=SID* (γ
max-γ
min)/(x
0-1), wherein, SID is the distance of x-ray source to the center of rotation of rotary frame, γ
maxand γ
minbe respectively maximum and the minima of the detector angle when scanning, x
0for the number of pixels of every row pixel on the pre-lateral projection of CT.
Preferably, the center of described second telltale mark respective pixel is to the pixel distance d between image median vertical line
xdetermined by following formula: d
x=| x-(x
0+ 1)/2|, wherein, x is the coordinate position of center on the pre-lateral projection of CT in X-direction of the second telltale mark respective pixel, x
0for the number of pixels of every row pixel on the pre-lateral projection of CT.
Preferably, described CT spacer scanning is the scanning of CT P-A Cephalomatrics, and described CT spacer is CT P-A Cephalomatrics, and the predetermined bit slice of described CT is the pre-P-A Cephalomatrics of CT, and the telltale mark in the pre-P-A Cephalomatrics of described CT is that the first telltale mark on the bed board by scanning sick bed obtains.
Preferably, describedly obtain the step of the current relative height of bed according to the pre-P-A Cephalomatrics of CT and comprise: when determining that the center of rotation of first telltale mark and rotary frame is in sustained height position, x-ray source and this first telltale mark 2 lines are with the angle a between x-ray source and center of rotation 2 lines; Determine deviation position when this first telltale mark departs from the center of rotation height of rotary frame and determine that x-ray source and this deviation position 2 lines are with the angle a between x-ray source and center of rotation 2 lines
1; Current relative height of bed h:h=SID*sin (a-a is obtained according to following formula
1)/(cos (a) * sin (a
1)), wherein, SID is the distance of x-ray source to the center of rotation of rotary frame.
Preferably, described x-ray source and this deviation position 2 lines are with the angle a between x-ray source and center of rotation 2 lines
1by measuring, two the first specifically labelled distances obtain.
Preferably, described a
1determined by following formula: a
1=d/ (2*SID), wherein, SID is the distance of x-ray source to the center of rotation of rotary frame, and d is being the center of circle with x-ray source, is taking SID as arc length distance on the circle of radius place between two the first telltale marks when departing from center of rotation height.
Preferably, describedly judge that center, position to be scanned that whether the current relative height of bed meet the requirements specifically by more current relative height of bed h and CT scan device storage is from the average height h of sick bed bed board
referencejudge.
Preferably, describedly judge that the whether satisfactory Rule of judgment of the current relative height of bed is: when | h-h
reference|≤50mm, then the current relative height of bed meets the requirements; Otherwise then the current relative height of bed is undesirable.
CT scan formation method of the present invention adjusts the height of bed of sick bed by the current relative height of bed obtained according to the predetermined bit slice of CT in CT spacer scanning process, to ensure that position to be scanned falls within the scope of scan vision, there is gibbs artifact in the reconstruction image avoiding detected person to obtain when carrying out the scanning of CT agreement, improves picture quality.
[accompanying drawing explanation]
Fig. 1 is the CT image utilizing existing CT scan formation method to rebuild.
Fig. 2 is the schematic flow sheet of CT scan formation method of the present invention.
Fig. 3 is the flow chart of steps obtaining CT spacer in CT scan formation method of the present invention.
Fig. 4 is the schematic diagram of CT scan equipment of the present invention.
Fig. 5 is the partial perspective view of the sick bed of CT scan equipment of the present invention.
Fig. 6 is the front view of the sick bed in Fig. 5.
Fig. 7 is the side view of the sick bed in Fig. 5.
Fig. 8 is the flow chart of steps obtaining the current relative height of bed when CT spacer is CT side spacer in Fig. 3.
Fig. 9 is the embodiment that the pre-lateral projection of CT obtained according to Fig. 8 method calculates the current relative height of bed.
Figure 10 is the flow chart of steps obtaining the current relative height of bed when CT spacer is CT P-A Cephalomatrics in Fig. 3.
Figure 11 is the embodiment that the pre-P-A Cephalomatrics of CT obtained according to Fig. 9 method calculates the current relative height of bed.
Figure 12 is that the CT rebuild according to CT scan formation method of the present invention rebuilds image.
[detailed description of the invention]
Below in conjunction with the drawings and specific embodiments, CT scan formation method of the present invention is described in further detail.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only for object that is convenient, the aid illustration embodiment of the present invention lucidly.
CT scan formation method provided by the invention adjusts the height of bed of sick bed by the current relative height of bed obtained according to the predetermined bit slice of CT in CT spacer scanning process, to ensure that position to be scanned falls within the scope of scan vision, there is gibbs artifact in the reconstruction image avoiding detected person to obtain when carrying out the scanning of CT agreement, improves picture quality.
Fig. 2 is the schematic flow sheet of CT scan formation method of the present invention.The method comprises the following steps:
S11, CT scan equipment is provided, described CT scan equipment 100 comprises the rotary frame 1 with test chamber 10, relatively be located at the x-ray source 2 on rotary frame and detector array 3, the computer 4 be electrically connected with detector array and carry the sick bed 5 that detected person in axial direction passes in and out the test chamber of rotary frame, described sick bed comprises bed board 50 and is located at the head rest 51 of bed board lengthwise to one end, described sick bed is provided with telltale mark 52, described telltale mark comprises is located at bed board 50 near first telltale mark 500 of head rest 51 one end and the second telltale mark 510 being located at head rest 51 both sides, the average height h of center from the bed board of sick bed at position to be scanned is had in described CT scan equipment
reference(incorporated by reference to shown in Fig. 4 to Fig. 7),
S12, the use to be scanned position of CT scan equipment to detected person are carried out the scanning of CT spacer and are obtained CT spacer;
S13, according to CT spacer select scan vision and to detected person carry out CT agreement scanning obtain original raw data;
S14, to carry out image reconstruction according to original raw data and obtain CT and rebuild image.
Shown in ginseng Fig. 3, in Fig. 2, step S12 uses CT scan equipment to comprise the steps: the process that detected person carries out CT spacer scanning acquisition CT spacer
S21, make sick bed along the axial direction of test chamber enter rotary frame test chamber until sick bed bed board on the first telltale mark enter within the scope of CT scan;
S22, the sick bed carrying detected person carried out to the scanning of CT spacer and obtain containing the predetermined bit slice of specifically labelled CT;
S23, according to the predetermined bit slice of CT obtain the current relative height of bed;
S24, judge whether the current relative height of bed meets the requirements;
S25, when the current relative height of bed is undesirable, then make sick bed exit rotary frame test chamber and according to the height of current relative height of bed adjustment sick bed and then repeat above-mentioned S21 to S24 step until the current relative height of bed meets the requirements;
S26, when the current relative height of bed meets the requirements, then continue to make sick bed to enter the test chamber of rotary frame until the CT spacer scanning completing follow up scan scope obtains CT spacer along the axial direction of test chamber.
Wherein, the described CT spacer scanning to be scanned position different according to detected person is divided into the scanning of CT lateral projection to scan with CT P-A Cephalomatrics.Obtaining CT spacer according to the scanning of CT lateral projection is CT lateral projection.CT spacer according to CT P-A Cephalomatrics scanning acquisition is CT P-A Cephalomatrics.The predetermined bit slice of CT obtained in CT lateral projection scanning process is the pre-lateral projection of CT, and the telltale mark in the pre-lateral projection of described CT is obtained by the second telltale mark of the head rest of scanning sick bed.The predetermined bit slice of CT obtained in CT P-A Cephalomatrics scanning process is the pre-P-A Cephalomatrics of CT, and the telltale mark in the pre-P-A Cephalomatrics of described CT is that the first telltale mark on the bed board by scanning sick bed obtains.
Particularly, in step S24, described to judge whether the current relative height of bed meets the requirements be by the center, position to be scanned of more current relative height of bed h and the CT scan device storage average height h from sick bed bed board
referencejudge.Particularly, as | h-h
reference|≤50mm, then the current relative height of bed meets the requirements; Otherwise then the current relative height of bed is undesirable.
Incorporated by reference to shown in Fig. 8 and Fig. 9, when the scanning of CT spacer scans for CT lateral projection, step S23 obtains the current relative height of bed according to the pre-lateral projection of CT.Comprise according to the step of the current relative height of bed of CT pre-lateral projection acquisition described in this S23:
S31, determine the centre coordinate position (x, y) of the second telltale mark respective pixel on the pre-lateral projection of CT;
S32, the number of pixels x often gone determined on the pre-lateral projection of CT
0;
S33, determine the actual range d that each pixel represents
0;
S34, according on the pre-lateral projection of CT often go number of pixels x
0obtain the coordinate of the pixel column on the median vertical line of the image on the pre-lateral projection of CT;
Pixel distance d between the center that S35, the pixel coordinate corresponding with the second telltale mark according to the pixel column coordinate on the median vertical line of the image on the pre-lateral projection of CT obtain the second telltale mark respective pixel to image median vertical line
x;
S36, according to the pixel distance d between the center of the second telltale mark respective pixel to image median vertical line
xthe actual range d represented with each pixel
0obtain current relative height of bed h.
Particularly, the described current relative height of bed h in step S36 is by by the pixel distance d between the second specifically labelled center to image median vertical line
xthe actual range d represented with each pixel
0do product process obtain, i.e. h=d
x* d
0.
In step S33, the actual range d of described each pixel representative
0determined by following formula: d
0=SID* (γ
max-γ
min)/(x
0-1), wherein, SID is the distance of x-ray source to the center of rotation of rotary frame, γ
maxand γ
minbe respectively maximum and the minima of the detector angle when scanning, x
0for the number of pixels of every row pixel on the pre-lateral projection of CT.
In step S34, the pixel distance d between the center of described second telltale mark respective pixel to image median vertical line
xdetermined by following formula: d
x=| x-(x
0+ 1)/2|, wherein, x is the coordinate position of center on the pre-lateral projection of CT in X-direction of the second telltale mark respective pixel, x
0for the number of pixels of every row pixel on the pre-lateral projection of CT.
Incorporated by reference to shown in Figure 10 to Figure 11, when the scanning of CT spacer scans for CT P-A Cephalomatrics, step S23 obtains the current relative height of bed according to the pre-P-A Cephalomatrics of CT.Comprise according to the step of the current relative height of bed of CT pre-P-A Cephalomatrics acquisition described in this S23:
S41, x-ray source (S) and the angle a between this first telltale mark (A) 2 same x-ray sources of line (S) and center of rotation (O) 2 lines when determining that the center of rotation (O) of first telltale mark (A) and rotary frame is in sustained height position;
S42, the deviation position (A determining when this first telltale mark (A) departs from the center of rotation height of rotary frame
1) and determine x-ray source (S) and this deviation position (A
1) 2 angle a between the same x-ray source of line (S) and center of rotation (O) 2 lines
1;
S43, obtain current relative height of bed h:h=SID*sin (a-a according to following formula
1)/(cos (a) * sin (a
1)), wherein, SID is the distance of x-ray source to the center of rotation of rotary frame.
Particularly, in step S42, described x-ray source and this deviation position 2 lines are with the angle a between x-ray source and center of rotation 2 lines
1by measuring, two the first specifically labelled distances obtain.
Particularly, described x-ray source and this deviation position 2 lines are with the angle a between x-ray source and center of rotation 2 lines
1determined by following formula: a
1=d/ (2*SID), wherein, SID is the distance of x-ray source to the center of rotation of rotary frame, and d is for being the center of circle with x-ray source (S), taking SID as radius place circle upper two the first telltale mark (A when departing from center of rotation height
1, B
1) between arc length distance.
Figure 12 is that the CT rebuild according to CT scan formation method of the present invention rebuilds image.Comparison diagram 1 and Figure 12 can obviously find out, do not have gibbs artifact in the CT image using CT scan formation method of the present invention to rebuild, picture quality is better.
To sum up, these are only preferred embodiment of the present invention, should not limit the scope of the invention with this, namely every simple equivalence done according to claims of the present invention and description of the present invention changes and modifies, and all should still remain within the scope of the patent.
Claims (12)
1. a CT scan formation method, is characterized in that, comprising:
CT scan equipment is provided, described CT scan equipment comprises the rotary frame with test chamber, relatively be located at the x-ray source on rotary frame and detector array, the computer be electrically connected with detector array and carry the sick bed that detected person in axial direction passes in and out the test chamber of rotary frame, described sick bed comprises bed board and is located at the head rest of bed board lengthwise to one end, described sick bed is provided with telltale mark, described telltale mark comprises the second telltale mark be located at first telltale mark of bed board near head rest one end Yu be located at head rest both sides, the average height of the bed board of the centre distance sick bed at position to be scanned is had in described CT scan equipment,
Use the to be scanned position of CT scan equipment to detected person to carry out the scanning of CT spacer and obtain CT spacer;
Select scan vision according to CT spacer and detected person carried out to the scanning of CT agreement to obtain original raw data;
Carry out image reconstruction according to original raw data and obtain CT reconstruction image;
Wherein, CT scan equipment is used to comprise the steps: the process that detected person carries out CT spacer scanning acquisition CT spacer
Make sick bed along the axial direction of test chamber enter rotary frame test chamber until sick bed bed board on the first telltale mark enter within the scope of CT scan;
Carrying out the scanning of CT spacer to the sick bed carrying detected person obtains containing the predetermined bit slice of specifically labelled CT;
The current relative height of bed is obtained according to the predetermined bit slice of CT;
Judge whether the current relative height of bed meets the requirements;
When the current relative height of bed is undesirable, then sick bed is made to exit the test chamber of rotary frame and adjust the height of sick bed according to the current relative height of bed and then repeat above-mentioned steps until the current relative height of bed meets the requirements;
When the current relative height of bed meets the requirements, then continue to make sick bed enter the test chamber of rotary frame until the CT spacer scanning completing follow up scan scope obtains CT spacer along the axial direction of test chamber.
2. CT scan formation method according to claim 1, it is characterized in that, described CT spacer scanning is the scanning of CT lateral projection, described CT spacer is CT lateral projection, the predetermined bit slice of described CT is the pre-lateral projection of CT, and the telltale mark in the pre-lateral projection of described CT is obtained by the second telltale mark of the head rest of scanning sick bed.
3. CT scan formation method according to claim 2, is characterized in that, the described step according to the current relative height of bed of CT pre-lateral projection acquisition comprises:
Determine the centre coordinate position (x, y) of the second telltale mark respective pixel on the pre-lateral projection of CT;
Determine the number of pixels x often gone on the pre-lateral projection of CT
0;
Determine the actual range d that each pixel represents
0;
According to the number of pixels x often gone on the pre-lateral projection of CT
0obtain the coordinate of the pixel column on the median vertical line of the image on the pre-lateral projection of CT;
Pixel distance d between the center obtaining the second telltale mark respective pixel according to the coordinate of the pixel column coordinate on the median vertical line of the image on the pre-lateral projection of CT and the second telltale mark respective pixel to image median vertical line
x;
According to the pixel distance d between the center of the second telltale mark respective pixel to image median vertical line
xthe actual range d represented with each pixel
0obtain current relative height of bed h.
4. CT scan formation method according to claim 3, is characterized in that, described current relative height of bed h is by by the pixel distance d between the center of the second telltale mark respective pixel to image median vertical line
xthe actual range d represented with each pixel
0do product process obtain.
5. CT scan formation method according to claim 4, is characterized in that, the actual range d of described each pixel representative
0determined by following formula: d
0=SID* (γ
max-γ
min)/(x
0-1), wherein, SID is the distance of x-ray source to the center of rotation of rotary frame, γ
maxand γ
minbe respectively maximum and the minima of the detector angle when scanning, x
0for the number of pixels of every row pixel on the pre-lateral projection of CT.
6. CT scan formation method according to claim 5, is characterized in that, the pixel distance d between the center of described second telltale mark respective pixel to image median vertical line
xdetermined by following formula: d
x=| x-(x
0+ 1)/2|, wherein, x is the coordinate position of center on the pre-lateral projection of CT in X-direction of the second telltale mark respective pixel, x
0for the number of pixels of every row pixel on the pre-lateral projection of CT.
7. CT scan formation method according to claim 1, it is characterized in that, described CT spacer scanning is the scanning of CT P-A Cephalomatrics, described CT spacer is CT P-A Cephalomatrics, the predetermined bit slice of described CT is the pre-P-A Cephalomatrics of CT, and the telltale mark in the pre-P-A Cephalomatrics of described CT is that the first telltale mark on the bed board by scanning sick bed obtains.
8. CT scan formation method according to claim 7, is characterized in that, the described step according to the current relative height of bed of CT pre-P-A Cephalomatrics acquisition comprises:
When determining that the center of rotation of first telltale mark and rotary frame is in sustained height position, x-ray source and this first telltale mark 2 lines are with the angle a between x-ray source and center of rotation 2 lines;
Determine deviation position when this first telltale mark departs from the center of rotation height of rotary frame and determine that x-ray source and this deviation position 2 lines are with the angle a between x-ray source and center of rotation 2 lines
1;
Current relative height of bed h:h=SID*sin (a-a is obtained according to following formula
1)/(cos (a) * sin (a
1)), wherein, SID is the distance of x-ray source to the center of rotation of rotary frame.
9. CT scan formation method according to claim 8, is characterized in that, described x-ray source and this deviation position 2 lines are with the angle a between x-ray source and center of rotation 2 lines
1by measuring, two the first specifically labelled distances obtain.
10. CT scan formation method according to claim 9, is characterized in that, described x-ray source and this deviation position 2 lines are with the angle a between x-ray source and center of rotation 2 lines
1determined by following formula: a
1=d/ (2*SID), wherein, SID is the distance of x-ray source to the center of rotation of rotary frame, and d is that the first telltale mark is being the center of circle with x-ray source, is taking SID as arc length distance on the circle of radius place between two the first telltale marks when departing from the height of center of rotation.
11. CT scan formation methods as claimed in any of claims 1 to 10, it is characterized in that, described to judge whether the current relative height of bed meets the requirements be by the center, position to be scanned of more current relative height of bed h and the CT scan device storage average height h from sick bed bed board
referencejudge.
12. CT scan formation methods according to claim 11, is characterized in that, describedly judge that the whether satisfactory judge process of the current relative height of bed is:
When | h-h
reference|≤50mm, then the current relative height of bed meets the requirements;
Otherwise then the current relative height of bed is undesirable.
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| CN106510748A (en) * | 2016-10-30 | 2017-03-22 | 苏州市克拉思科文化传播有限公司 | Intelligent medical imaging equipment |
| CN106682408A (en) * | 2016-12-19 | 2017-05-17 | 上海联影医疗科技有限公司 | Medical imaging system and protocol framework and protocol editing method thereof |
| CN109171793A (en) * | 2018-11-01 | 2019-01-11 | 上海联影医疗科技有限公司 | A kind of detection of angle and bearing calibration, device, equipment and medium |
| CN110477940A (en) * | 2018-05-15 | 2019-11-22 | 通用电气公司 | Detect bed and CT system |
| CN111991019A (en) * | 2020-08-14 | 2020-11-27 | 北京大学深圳医院 | CT scanning bed effective scanning range identification method, device, equipment and storage medium |
| CN113081017A (en) * | 2021-03-30 | 2021-07-09 | 东软医疗系统股份有限公司 | CT scanning method and device and electronic equipment |
| CN113749680A (en) * | 2021-08-05 | 2021-12-07 | 中国人民解放军总医院 | Scanning positioning method, device, storage medium and computer equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008167804A (en) * | 2007-01-09 | 2008-07-24 | Toshiba Corp | X-ray ct apparatus |
| US20120002782A1 (en) * | 2009-03-06 | 2012-01-05 | Ryo Yoshida | X-ray ct apparatus and tomography method |
| CN103142230A (en) * | 2013-03-27 | 2013-06-12 | 深圳安科高技术股份有限公司 | Magnetic resonance positioning scanning method and device |
| CN103181775A (en) * | 2011-12-31 | 2013-07-03 | Ge医疗系统环球技术有限公司 | Method and system for detecting position of patient body mark |
| CN104287759A (en) * | 2013-07-16 | 2015-01-21 | 上海联影医疗科技有限公司 | CT scanning imaging method |
| CN104586421A (en) * | 2014-12-31 | 2015-05-06 | 沈阳东软医疗系统有限公司 | Method and device for eliminating positioning eccentricity |
-
2014
- 2014-01-15 CN CN201410018487.6A patent/CN104771184B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008167804A (en) * | 2007-01-09 | 2008-07-24 | Toshiba Corp | X-ray ct apparatus |
| US20120002782A1 (en) * | 2009-03-06 | 2012-01-05 | Ryo Yoshida | X-ray ct apparatus and tomography method |
| CN103181775A (en) * | 2011-12-31 | 2013-07-03 | Ge医疗系统环球技术有限公司 | Method and system for detecting position of patient body mark |
| CN103142230A (en) * | 2013-03-27 | 2013-06-12 | 深圳安科高技术股份有限公司 | Magnetic resonance positioning scanning method and device |
| CN104287759A (en) * | 2013-07-16 | 2015-01-21 | 上海联影医疗科技有限公司 | CT scanning imaging method |
| CN104586421A (en) * | 2014-12-31 | 2015-05-06 | 沈阳东软医疗系统有限公司 | Method and device for eliminating positioning eccentricity |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106510748A (en) * | 2016-10-30 | 2017-03-22 | 苏州市克拉思科文化传播有限公司 | Intelligent medical imaging equipment |
| CN106682408A (en) * | 2016-12-19 | 2017-05-17 | 上海联影医疗科技有限公司 | Medical imaging system and protocol framework and protocol editing method thereof |
| CN110477940A (en) * | 2018-05-15 | 2019-11-22 | 通用电气公司 | Detect bed and CT system |
| CN109171793A (en) * | 2018-11-01 | 2019-01-11 | 上海联影医疗科技有限公司 | A kind of detection of angle and bearing calibration, device, equipment and medium |
| CN111991019A (en) * | 2020-08-14 | 2020-11-27 | 北京大学深圳医院 | CT scanning bed effective scanning range identification method, device, equipment and storage medium |
| CN111991019B (en) * | 2020-08-14 | 2022-07-12 | 北京大学深圳医院 | CT scanning bed effective scanning range identification method, device, equipment and storage medium |
| CN113081017A (en) * | 2021-03-30 | 2021-07-09 | 东软医疗系统股份有限公司 | CT scanning method and device and electronic equipment |
| CN113081017B (en) * | 2021-03-30 | 2022-11-29 | 东软医疗系统股份有限公司 | CT scanning method and device and electronic equipment |
| CN113749680A (en) * | 2021-08-05 | 2021-12-07 | 中国人民解放军总医院 | Scanning positioning method, device, storage medium and computer equipment |
| CN113749680B (en) * | 2021-08-05 | 2023-08-04 | 中国人民解放军总医院 | Scanning positioning method, scanning positioning device, storage medium and computer equipment |
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