CN105726054A - Double-circular arc track CT (computed tomography) scanner - Google Patents
Double-circular arc track CT (computed tomography) scanner Download PDFInfo
- Publication number
- CN105726054A CN105726054A CN201610297974.XA CN201610297974A CN105726054A CN 105726054 A CN105726054 A CN 105726054A CN 201610297974 A CN201610297974 A CN 201610297974A CN 105726054 A CN105726054 A CN 105726054A
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- China
- Prior art keywords
- scanner
- driven
- gear
- detection box
- bicircular arcs
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
- A61B6/032—Transmission computed tomography [CT]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
- A61B6/032—Transmission computed tomography [CT]
- A61B6/035—Mechanical aspects of CT
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/40—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/42—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
Abstract
The invention discloses a double-circular arc track CT (computed tomography) scanner. The double-circular arc track CT scanner comprises a scanning stage, a machine head, a detection box, and a rotary mechanism, wherein a to-be-scanned object is put on the scanning stage; the machine head is positioned at one side of the scanning stage, an X-ray source is arranged in the machine head, and a front collimator is arranged at the front part of the machine head; the detection box is positioned at the other side of the scanning stage, a detector is arranged in the detection box, and a back collimator is arranged at the front part of the detector; the rotary mechanism is used for driving the detection box to do circular arc movement relative to the center of the scanning stage. The double-circular arc track CT scanner has the advantages that the structure is convenient, the safety and reliability are realized, the amount of radiating agent is reduced, and the image quality is improved.
Description
Technical field
The present invention relates to technical field of medical instruments, be specifically related to a kind of bicircular arcs track CT scanner.
Background technology
Computed tomography (computedtomography, CT) scanner is a kind of powerful medical imaging diagnosis equipment, it utilizes X ray that a certain scope of human body is carried out successively transverse scan, projection information is obtained by detector, data process and image reconstruction is carried out again by computer, wherein, the projection information that detector obtains is most important to the quality of image reconstruction.
At present, what the detector of CT scanner adopted is all scintillator luminous intensity distribution electric diode, and its signals collecting belongs to integral mode.Within a sampling period, having a lot of X-ray to enter detector, X-ray of these high energy is converted to many low-energy fluorescent photons by the scintillator in detector, and fluorescent photon enters photodiode, becomes the signal of telecommunication to export by photoelectric effect reconvert.Converting in signal of telecommunication process at X-ray, the dark current of detector and afterglow effect are difficult to eliminate, and therefore the signal to noise ratio of detector is poor.It addition, in this transformation process, the quantity of the fluorescent photon that X-ray that energy is high produces is relatively more, the electron number that therefore photoelectric effect produces also compares many, and so in the integrated signal gathered, the signal weight of high energy X photon is also relatively larger.But, in CT image-forming principle, X-ray of mental retardation part is more suitable for different materials is differentiated；Therefore, the signals collecting mode of integral mode is unfavorable for CT imaging.
It addition, in the R&D process of CT, researcher needs compact, flexible structure, the convenient principle prototype of transformation, it is desirable at any time according to the experimental program designed, simple refit can be carried out and just can meet the demand of various scientific research；Being additionally, since detector expensive, the budget accounting that can cause this in Proof-Of Principle stage use curved detector is higher, causes otherwise expense to reduce, the scientific achievement that impact is overall.
Summary of the invention
For the weak point existed in above-mentioned technology, the invention provides that a kind of structure is convenient, safe and reliable, radiation dose can be reduced, improve the bicircular arcs track CT scanner of picture quality.
The technical solution adopted for the present invention to solve the technical problems is: a kind of bicircular arcs track CT scanner, including: for placing the scan table of scanning thing；Head, it is positioned at the side of described scan table, described head be internally provided with x-ray source, the front portion of described head is provided with front collimator；Detection box, it is positioned at the opposite side of described scan table, and described detection box is built-in with detector, and the front portion of described detector is provided with rear collimator；And drive the center of the relatively described scan table of described detection box to make the rotating mechanism of circular motion.
Preferably, described scan table being provided with disk, described disk is driven the center of relatively described scan table to move in a circle by drive motor.
Preferably, described scan table is driven by lift cylinder and does lifting moving.
Preferably, described detection box is provided with the elevating mechanism driving described detection box to do lifting moving.
Preferably, described rotating mechanism includes gantry and the rotating unit driving described gantry to rotate, and described detection box is placed on described gantry.
Preferably, described rotating unit includes rotary electric machine, driven the driven gear of worm gear and the described worm gear transmission rotated by described rotary electric machine, driven by described driven gear and do connecting gear, described connection gear driven making counter-rotational rotation gear, made the rotating disk of rotating in same direction by described rotation gear driven of rotating in same direction, described rotating disk and described gantry Joint.
Preferably, described worm gear, driven gear, connection gear, rotation gear are placed in casing.
Preferably, described rotating unit and head are placed on base, and the bottom of described base is provided with castor.
Preferably, described detector is the high count rate detector based on cadmium-zinc-teiluride.
Compared with prior art, it provides the benefit that the present invention: bicircular arcs track CT scanner provided by the invention, by being moved in a circle at the center that scanning thing is placed on the disk of scan table relative scanning platform, to realize scanning the complete CT scan of thing；, driven the center of the detection box relative scanning platform equipped with detector to do circular motion by rotating mechanism, to realize the investigative range of curved detector；Drive gantry to do circular motion by arranging the rotating unit of three-stage cylindrical gear, be accurately positioned detection with what realize gantry；This bicircular arcs track CT scanner, structure is convenient, safe and reliable, can reduce radiation dose and improve picture quality.
Accompanying drawing explanation
Fig. 1 is the structural representation of bicircular arcs track CT scanner of the present invention；
Fig. 2 is the internal structure schematic diagram of rotating unit of the present invention；
In figure: 01 head；Collimator before 02；03 base；04 castor；05 rotating disk；06 casing；07 rotary electric machine；08 gantry；09 elevating mechanism；10 detection boxes；Collimator after 11；12 lift cylinders；13 scan tables；14 drive motors；15 disks；16 worm gears；17 driven gears；18 connect gear；19 rotate gear.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail, to make those skilled in the art can implement according to this with reference to description word.
As shown in Fig. 12, the invention provides a kind of bicircular arcs track CT scanner, including: scan table 13, head 01, detection box 10, rotating mechanism and base 03, the bottom of described base 03 is provided with castor 04, described scan table 13 is provided with disk 15, described disk 15 is used for placing scanning object, described disk 15 is driven the center of relatively described scan table 13 to move in a circle by drive motor 14, described scan table 13 is driven by lift cylinder 12 and does lifting moving, and described lift cylinder 12 is placed on described base 03.
Described head 01 is positioned at the side of described scan table 13 and is placed on base 03, described head 01 be internally provided with x-ray source (not shown), the front portion of described head 01 is provided with front collimator 02；Described detection box 10 is positioned at the opposite side of described scan table 13, described detection box 10 is built-in with detector (not shown), the front portion of described detector is provided with rear collimator 11, described detection box 10 is provided with the elevating mechanism 09 driving described detection box 10 to do lifting moving, described detector is the high count rate detector based on cadmium-zinc-teiluride, X-ray can be carried out energy resolution by the high count rate energy-resolved detector based on cadmium-zinc-teiluride, add the quantity of information extracted from each X-ray, it is possible to effectively reduce the radiation dose of CT scan from hardware point of view.
nullDescribed rotating mechanism drives the center of the relatively described scan table 13 of described detection box 10 to do circular motion，Described rotating mechanism includes gantry 08 and the rotating unit driving described gantry 08 to rotate，Described detection box 10 is placed on described gantry 08，Described rotating unit is placed on described base 03，Described rotating unit includes rotary electric machine 07、The worm gear 16 of rotation is driven by described rotary electric machine 07、With the driven gear 17 that described worm gear 16 coordinates transmission、The connection gear 18 doing rotating in same direction is driven by described driven gear 17、Driven by described connection gear 18 and make counter-rotational rotation gear 19、The rotating disk 05 doing rotating in same direction is driven by described rotation gear 19，Described rotating disk 05 and described gantry 08 Joint，Described worm gear 16、Driven gear 17、Connect gear 18、Rotate gear 19 to be placed in casing 06，Gantry 08 is driven to do circular motion by arranging the rotating unit of three-stage cylindrical gear，It is accurately positioned detection with what realize gantry 08.
The work process of bicircular arcs track CT scanner provided by the invention is as follows: be placed in by scanning object on disk 15, and the height of scan table 13 is regulated by lift cylinder 12, the height of detection box 10 is regulated, to cause front collimator 02, scanning object, rear collimator 11 to be on same plane by elevating mechanism 09；Start drive motor 14 to cause the center of scanning thing relative scanning platform 13 to do 360 degree of circular motion, to realize the complete CT scan of scanning thing；Start rotating mechanism to drive the center of the detection box 10 relative scanning platform 13 equipped with detector to do circular motion, to realize the investigative range of curved detector；Start CT scanner, the premenstrual collimator 02 of x-ray source in head 01 penetrates, and after the scanning thing that constantly moves in a circle, through after collimator 11 received by detector, and data detector received by computer control system (not shown) process；This bicircular arcs track CT scanner, structure is convenient, safe and reliable, can reduce radiation dose and improve picture quality.
Although embodiment of the present invention are disclosed as above, but listed utilization that it is not limited in description and embodiment, it can be applied to various applicable the field of the invention completely, for those skilled in the art, it is easily achieved other amendment, therefore, under the general concept limited without departing substantially from claim and equivalency range, the present invention is not limited to specific details and shown here as the legend with description.
Claims (9)
1. a bicircular arcs track CT scanner, it is characterised in that including:
For placing the scan table of scanning thing；
Head, it is positioned at the side of described scan table, described head be internally provided with x-ray source, the front portion of described head is provided with front collimator；
Detection box, it is positioned at the opposite side of described scan table, and described detection box is built-in with detector, and the front portion of described detector is provided with rear collimator；And
The rotating mechanism of circular motion is made at the center driving the relatively described scan table of described detection box.
2. bicircular arcs track CT scanner as claimed in claim 1, it is characterised in that being provided with disk on described scan table, described disk is driven the center of relatively described scan table to move in a circle by drive motor.
3. bicircular arcs track CT scanner as claimed in claim 1, it is characterised in that described scan table is driven by lift cylinder and does lifting moving.
4. bicircular arcs track CT scanner as claimed in claim 1, it is characterised in that be provided with the elevating mechanism driving described detection box to do lifting moving on described detection box.
5. bicircular arcs track CT scanner as claimed in claim 1, it is characterised in that described rotating mechanism includes gantry and the rotating unit driving described gantry to rotate, and described detection box is placed on described gantry.
6. bicircular arcs track CT scanner as claimed in claim 5, it is characterized in that, described rotating unit includes rotary electric machine, driven the driven gear of worm gear and the described worm gear transmission rotated by described rotary electric machine, driven by described driven gear and do connecting gear, described connection gear driven making counter-rotational rotation gear, made the rotating disk of rotating in same direction by described rotation gear driven of rotating in same direction, described rotating disk and described gantry Joint.
7. bicircular arcs track CT scanner as claimed in claim 6, it is characterised in that described worm gear, driven gear, connection gear, rotation gear are placed in casing.
8. bicircular arcs track CT scanner as claimed in claim 6, it is characterised in that described rotating unit and head are placed on base, and the bottom of described base is provided with castor.
9. bicircular arcs track CT scanner as claimed in claim 1, it is characterised in that described detector is the high count rate detector based on cadmium-zinc-teiluride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610297974.XA CN105726054A (en) | 2016-05-09 | 2016-05-09 | Double-circular arc track CT (computed tomography) scanner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610297974.XA CN105726054A (en) | 2016-05-09 | 2016-05-09 | Double-circular arc track CT (computed tomography) scanner |
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| CN105726054A true CN105726054A (en) | 2016-07-06 |
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| CN201610297974.XA Pending CN105726054A (en) | 2016-05-09 | 2016-05-09 | Double-circular arc track CT (computed tomography) scanner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108008458A (en) * | 2017-12-29 | 2018-05-08 | 同方威视技术股份有限公司 | Vehicle-mounted back scattering checks system |
| CN109350867A (en) * | 2018-08-01 | 2019-02-19 | 合肥中科离子医学技术装备有限公司 | A kind of structure for rotary frame inner rotation backboard |
| CN109730713A (en) * | 2019-01-28 | 2019-05-10 | 深圳市纳诺艾医疗科技有限公司 | A kind of second-order fluorescence wide-angle Multifunctional imaging equipment |
| CN109350867B (en) * | 2018-08-01 | 2024-04-26 | 合肥中科离子医学技术装备有限公司 | Structure for rotating backboard inside rotating rack |
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| CN109730713A (en) * | 2019-01-28 | 2019-05-10 | 深圳市纳诺艾医疗科技有限公司 | A kind of second-order fluorescence wide-angle Multifunctional imaging equipment |
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Application publication date: 20160706 |