CN113384288A - Light cone beam CT scanning system and CT scanning method - Google Patents
Light cone beam CT scanning system and CT scanning method Download PDFInfo
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- CN113384288A CN113384288A CN202110788536.4A CN202110788536A CN113384288A CN 113384288 A CN113384288 A CN 113384288A CN 202110788536 A CN202110788536 A CN 202110788536A CN 113384288 A CN113384288 A CN 113384288A
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- flat panel
- scanning system
- panel detector
- ray generator
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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]
- A61B6/035—Mechanical aspects of CT
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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
- A61B6/40—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
- A61B6/40—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/4064—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis specially adapted for producing a particular type of beam
- A61B6/4085—Cone-beams
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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
- A61B6/42—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis
- A61B6/4208—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
Abstract
The invention discloses a light cone beam CT scanning system and a CT scanning method, wherein the cone beam CT scanning system comprises an ray generator, a flat panel detector, a supporting component and a base, the flat panel detector and the ray generator are oppositely arranged, the flat panel detector is used for receiving rays emitted by the ray generator and imaging, the supporting component can drive the flat panel detector and the ray generator to rotate around a rotating shaft extending along the horizontal direction, the lower part of the base is provided with a moving part, and the moving part enables the flat panel detector and the ray generator to move along the horizontal direction relative to the ground. The light cone beam CT scanning system and the light cone beam CT scanning method provided by the invention can be moved integrally and can be used for scanning targets which are inconvenient to move and adjust positions.
Description
Technical Field
The invention relates to the technical field of CT imaging, in particular to a light cone-beam CT scanning system and a CT scanning method.
Background
X-ray imaging systems are finding increasing application in the industrial and medical fields, where industry can be used for non-destructive inspection of materials; when the scanning device is used in the medical field, a specific part of a human body can be scanned, the scanning result can assist a doctor in making a diagnosis, even is often an important diagnosis basis, and the scanning device plays an important role in the fields of brain, orthopedics, dentistry and the like.
When scanning the target, the positions of the ball tube and the flat panel detector need to be moved while continuously scanning due to the requirements on the field of view, the precision and the space structure. In the prior art, CT apparatuses having such functions are available in both industrial and medical fields, and since CT apparatuses are heavy, the scanning object is often moved during scanning in order to scan the image of the target region. Therefore, the following problems arise: when the scanning object is not conveniently moved, it is difficult to movably scan the scanning object.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a light cone-beam CT scanning system and a CT scanning method. The technical scheme is as follows:
in one aspect, the present invention provides a lightweight cone-beam CT scanning system, comprising:
a ray generator capable of emitting rays;
the flat panel detector is arranged opposite to the ray generator and is used for receiving rays emitted by the ray generator and imaging;
the flat panel detector and the ray generator are connected through the supporting component, the supporting component can drive the flat panel detector and the ray generator to rotate around a rotating shaft extending along the horizontal direction, and the rotating shaft is positioned between the flat panel detector and the ray generator;
the base is connected with the supporting component, a moving part is arranged on the lower portion of the base, and the moving part enables the flat panel detector and the ray generator to move along the horizontal direction relative to the ground.
Furthermore, the supporting component comprises a first annular support, a second annular support and a driving part, the circle centers of the first annular support and the second annular support are located on the rotating shaft, the flat panel detector and the ray generator are connected with the second annular support, and the second annular support can rotate around the rotating shaft relative to the first annular support under the action of the driving part, so that the flat panel detector and the ray generator are driven to rotate around the rotating shaft.
Further, the supporting component still including all set up in first supporting part and second supporting part on the second toroidal support, first supporting part with the length direction of second supporting part all follows the radial extension of second toroidal support, the ray generator set up in the telecentric end department of first supporting part, flat panel detector set up in the telecentric end department of second supporting part.
Further, the length of the first support portion is adjustable, and/or the length of the second support portion is adjustable.
Furthermore, the cone beam CT scanning system further includes a high voltage generator for supplying power to the ray generator, the high voltage generator is disposed at an end portion of the second annular support where the flat panel detector is disposed, and the high voltage generator is electrically connected to the ray generator.
Further, the cone-beam CT scanning system further comprises:
a fixed harness device disposed on the second annular bracket;
the telescopic wire harness device is arranged on the first annular support and/or the base;
a receiving portion provided at the support assembly, the receiving portion being capable of receiving at least a portion of the electrical wire between the first and second annular brackets;
and the wire connected with the ray generator and/or the flat panel detector is connected with the telescopic wire harness device through the fixed wire harness device, and when the second annular support rotates relative to the first annular support, the telescopic wire harness device adjusts the length of the wire between the first annular support and the second annular support.
Furthermore, the accommodating part is an annular accommodating cavity arranged on the second annular support, and the circle center of the accommodating cavity is located on the straight line of the rotating shaft.
Further, the cone beam CT scanning system further includes an image acquisition device, a motion control system connected to the motion part, and a processor, where the processor can control the motion control system according to an acquisition result of the image acquisition device, and/or the processor can receive a user instruction to control the motion control system, so that the cone beam CT scanning system moves in a horizontal direction with respect to the ground.
Further, the image acquisition device is a panoramic camera, and the panoramic camera is arranged at one end part of the support component, which is provided with the ray generator.
In another aspect, the present invention provides a CT scanning method based on the cone-beam CT scanning system, the CT scanning method comprising the following steps:
the cone beam CT scanning system moves along the length direction of a scanned object and collects images so as to obtain an integral image of the scanned object;
and the cone beam CT scanning system moves to a position corresponding to the target position of the scanning object, and carries out CT scanning imaging on the target position.
The technical scheme provided by the invention has the following beneficial effects:
a. the cone beam CT scanning system can move integrally and can be used for scanning targets which are inconvenient to move and adjust positions;
b. the cone beam CT scanning system realizes the light weight of the system through the design of the annular bracket, is convenient to move and saves the cost;
c. the wires are accommodated, so that the wires are still orderly arranged when the flat panel detector and the ray generator rotate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a first schematic side view of a cone-beam CT scanning system according to an embodiment of the present invention;
FIG. 2 is a first schematic diagram of a cone-beam CT scanning system according to an embodiment of the present invention;
FIG. 3 is a schematic side view of a cone-beam CT scanning system according to an embodiment of the present invention;
fig. 4 is a schematic front view of a cone-beam CT scanning system according to an embodiment of the present invention.
Wherein the reference numerals are respectively: 1-ray generator, 11-beam light device, 2-flat panel detector, 3-high voltage generator, 41-first annular support, 42-second annular support, 43-driving part, 44-rotating shaft, 45-first support part, 46-second support part, 47-accommodating cavity, 48-through hole part, 49-wire, 5-X ray, 6-scanning object, 61-target position, 7-base and 71-moving part.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
Referring to fig. 1-4, in one embodiment of the present invention, a lightweight cone-beam CT scanning system is provided, comprising:
a ray generator 1, said ray generator 1 being capable of emitting rays; the ray generator 1 may be a device emitting gamma rays, or an X-ray bulb tube emitting X-rays 5, and the ray generator 1 is a cone beam ray generator, in this embodiment, the protection range should include a full cone beam and a half cone beam;
the flat panel detector 2 is arranged opposite to the ray generator 1, and the flat panel detector 2 is used for receiving rays emitted by the ray generator 1 and passing through the beam splitter 11 and imaging;
the flat panel detector 1 and the ray generator 2 are connected through the supporting component, the supporting component can drive the flat panel detector 1 and the ray generator 2 to rotate around a rotating shaft 44 extending along the horizontal direction, and the rotating shaft 44 is positioned between the flat panel detector 1 and the ray generator 2;
the base 7, the base 7 with the supporting component is connected, the lower part of base 7 is provided with motion portion 71, motion portion 71 makes flat panel detector 2 with ray generator 1 can move along the horizontal direction for the ground, motion portion 71 can be the wheel, also can be the guide rail system.
In an embodiment of the present invention, the supporting assembly includes a first annular support 41, a second annular support 42, and a driving portion 43, centers of circles of the first annular support 41 and the second annular support 42 are located on the rotation axis 44, the flat panel detector 2 and the ray generator 1 are connected to the second annular support 42, and the second annular support 42 can rotate around the rotation axis 44 relative to the first annular support 41 under the action of the driving portion 43, so as to drive the flat panel detector 2 and the ray generator 1 to rotate around the rotation axis 44. A through hole portion 48 through which the scanning object 6 passes; the driving portion 43 may be a gear driving system.
In an embodiment of the present invention, the support assembly further includes a first support 45 and a second support 46 both disposed on the second annular support 42, a length direction of the first support 45 and a length direction of the second support 46 both extend along a radial direction of the second annular support 42, the ray generator 1 is disposed at a distal end of the first support 45, and the flat panel detector 2 is disposed at a distal end of the second support 46.
In one embodiment of the present invention, the length of the first support portion 45 is adjustable, and/or the length of the second support portion 46 is adjustable, and specifically, the subject center is always on the axis of the ring support. By adjusting the lengths of the first supporting part and the second supporting part, different geometric magnification ratios can be realized. The magnification ratio is defined as: the distance from the focal point of the ray source to the imaging surface of the flat panel detector/the distance from the focal point of the ray source to the rotation center. Therefore, by adjusting the distance between the flat panel detector 2 and the ray generator 1 to the rotation axis 44, different imaging requirements can be satisfied.
In the prior art, the ball tube, the detector and the rotating shaft are often connected through a linear support, so that the force arm of the support is unbalanced in stress, and the manufactured CT instrument also occupies a large space, is heavy and is high in cost. The annular support of the embodiment solves the problem of unbalanced stress, and the weight of the cone-beam CT scanning system is reduced as much as possible by extending the distance from the ray generator 1 and the flat panel detector 3 to the rotation axis 44 through the arrangement of the first support 45 and the second support 46. The weight of the cone beam CT scanning system of the embodiment can be controlled within 70kg, even within 50kg, which is less than or equal to the weight of an adult, so that the moving CT scanner is better than the moving adult as a detection target in scanning imaging.
In an embodiment of the present invention, the cone-beam CT scanning system further includes a high voltage generator 3 for supplying power to the ray generator 1, the high voltage generator 3 is disposed at an end of the second annular support 42 where the flat panel detector 2 is disposed, and the high voltage generator 3 is electrically connected to the ray generator 1. The weight of the ray generator 1 is heavier, so that the high-voltage generator 3 and the flat panel detector 2 are arranged at the same side, the force arm can be balanced, and the supporting component is more stable in rotation and less prone to abrasion loss.
Referring to fig. 3, in an embodiment of the present invention, the cone-beam CT scanning system further includes:
a fixed harness device 491 provided on the second annular bracket 42;
a retractable harness device 492, said retractable harness device 492 being disposed on said first ring support 41 and/or said base 7;
a housing provided at the support assembly, able to house at least part of the electric wire 49 between the first annular support 41 and the second annular support 42;
the wires connected to the radiation generator 1 and/or to the flat panel detector 2 are connected to the telescopic harness device 492 via the fixed harness device 491, and the telescopic harness device 491 adjusts the length of the wires 49 between the first ring support 41 and the second ring support 42 when the second ring support 42 is rotated relative to the first ring support 41.
In an embodiment of the present invention, the accommodating portion is an annular accommodating cavity 47 disposed on the second annular bracket 42, and a center of the accommodating cavity 47 is located on a straight line of the rotating shaft 44. The second annular frame 42, when rotated, enables the electric wire 49 to be drawn out and coiled in the housing chamber 47; when the second annular bracket 42 is rotated in the opposite direction, the electrical cord 49 is gradually retracted into the retractable cord assembly 492.
With the radiation generator 1 positioned directly above the flat panel detector 2 in the original state of the cone-beam CT scanning system, the second annular support 42 preferably rotates by approximately 360 °, and after scanning imaging, the second annular support 42 is automatically reset to return the cone-beam CT scanning system to the original state.
Due to the hidden wiring arrangement of the embodiment, the cone beam CT scanning system of the embodiment has a simple and attractive appearance, and the phenomena that wires exposed outside are hooked into a group and people or objects are stumbled cannot occur.
In an embodiment of the present invention, the cone-beam CT scanning system further includes an image acquisition device, a motion control system connected to the motion portion 71, and a processor, where the image acquisition device and the motion control system are both connected to the processor, and the processor can control the motion control system according to an acquisition result of the image acquisition device, and/or the processor can receive a user instruction to control the motion control system, so that the cone-beam CT scanning system moves in a horizontal direction with respect to the ground.
In one embodiment of the present invention, the image capturing device is a panoramic camera (i.e., a wide-angle camera) disposed at an end of the support assembly where the radiation generator 1 is disposed to facilitate image collection of the scan object 6. Preferably, the panoramic camera is disposed at the beam splitter 11. The picture in the camera field of vision transmits control work platform in real time, and the operator can select the region or the direction in the field of vision, sends control command to the dolly of base 7, commands the dolly to remove, accurately reaches the shooting position. Or, the scanning part is preset, then the control console operates the trolley to move, the whole body of the object is shot, and after the target part is identified, the trolley moves again to enable the ray generator to be positioned above the target part, so that the scanning is convenient.
The drive portion 43, the first support portion 45 and the second support portion 46 may all be connected to and controlled in movement and state by the processor.
The embodiment of the invention also provides a CT scanning method, which is based on the cone beam CT scanning system, and comprises the following steps:
the cone beam CT scanning system moves along the length direction of the scanned object 6 and acquires an image to acquire an overall image of the scanned object 6;
after the whole image is acquired, the processor analyzes the whole image, controls the cone beam CT scanning system to move to a position corresponding to the target position 61 of the scanning object 6 according to the set target position 61, and carries out CT scanning imaging on the target position 61.
Alternatively, after the image acquisition device directly photographs the lower part, the processor may directly determine the position of the cone beam CT scanning system relative to the scanning object 6, and control the cone beam CT scanning system to move to the position corresponding to the target position 61.
Referring to fig. 1, 2 and 4, when the scanning object 6 is subjected to image acquisition and scanning imaging, the scanning object passes through the through hole portions 48 of the two annular supports, and the line where the rotation axis 44 is located preferentially passes through the scanning object 6, so that the distances from the ray generator 1 and the flat panel detector 2 to the scanning object 6 are not substantially changed when the second annular support 42 rotates.
Referring to fig. 2, the cone-beam CT scanning system of the present embodiment adopts a scheme of installing the flat panel detector 3 with the center offset, and accordingly, the flat panel detector 3 can move along the direction perpendicular to the rotation axis 44 on the horizontal plane, while the position of the ray generator 1 is unchanged and the ray emitting angle is changed, so that an image of a larger area can be obtained through two times of imaging at different angles.
The cone-beam CT scanning system can be used for CT scanning of patients and industrial large-scale instruments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A lightweight cone-beam CT scanning system, comprising:
a ray generator capable of emitting rays;
the flat panel detector is arranged opposite to the ray generator and is used for receiving rays emitted by the ray generator and imaging;
the flat panel detector and the ray generator are connected through the supporting component, the supporting component can drive the flat panel detector and the ray generator to rotate around a rotating shaft extending along the horizontal direction, and the rotating shaft is positioned between the flat panel detector and the ray generator;
the base is connected with the supporting component, a moving part is arranged on the lower portion of the base, and the moving part enables the flat panel detector and the ray generator to move along the horizontal direction relative to the ground.
2. The cone-beam CT scanning system of claim 1 wherein the support assembly comprises a first annular support, a second annular support, and a driving portion, the centers of the first annular support and the second annular support are located on the rotation axis, the flat panel detector and the radiation generator are connected to the second annular support, and the second annular support is capable of rotating around the rotation axis relative to the first annular support under the action of the driving portion, so as to rotate the flat panel detector and the radiation generator around the rotation axis.
3. The cone-beam CT scanning system of claim 2 wherein the support assembly further comprises a first support and a second support each disposed on the second annular support, the first support and the second support each having a length extending in a radial direction of the second annular support, the radiation generator being disposed at a distal end of the first support, the flat panel detector being disposed at a distal end of the second support.
4. The cone beam CT scanning system of claim 3 wherein the first support is adjustable in length and/or the second support is adjustable in length.
5. The cone-beam CT scanning system of claim 2 further comprising a high voltage generator for powering the radiation generator, the high voltage generator being disposed at an end of the second annular support at which the flat panel detector is disposed, and the high voltage generator being electrically connected to the radiation generator.
6. The cone beam CT scanning system of claim 2 further comprising:
a fixed harness device disposed on the second annular bracket;
the telescopic wire harness device is arranged on the first annular support and/or the base;
a receiving portion provided at the support assembly, the receiving portion being capable of receiving at least a portion of the electrical wire between the first and second annular brackets;
and the wire connected with the ray generator and/or the flat panel detector is connected with the telescopic wire harness device through the fixed wire harness device, and when the second annular support rotates relative to the first annular support, the telescopic wire harness device adjusts the length of the wire between the first annular support and the second annular support.
7. The cone beam CT scanning system of claim 6 wherein the receiving portion is an annular receiving cavity disposed on the second annular support, and a center of the receiving cavity is located on a straight line of the rotation axis.
8. The cone beam CT scanning system of claim 1 further comprising an image acquisition device, a motion control system connected to the motion portion, and a processor, wherein the processor is capable of controlling the motion control system based on the acquisition results of the image acquisition device and/or the processor is capable of receiving user instructions to control the motion control system to move the cone beam CT scanning system in a horizontal direction relative to the ground.
9. The cone beam CT scanning system of claim 8 wherein said image capture device is a panoramic camera disposed at an end of said support assembly at which said ray generator is disposed.
10. A CT scanning method based on a cone-beam CT scanning system according to any of claims 1 to 9, comprising the steps of:
the cone beam CT scanning system moves along the length direction of a scanned object and collects images so as to obtain an integral image of the scanned object;
and the cone beam CT scanning system moves to a position corresponding to the target position of the scanning object, and carries out CT scanning imaging on the target position.
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| CN202110788536.4A CN113384288A (en) | 2021-07-13 | 2021-07-13 | Light cone beam CT scanning system and CT scanning method |
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| CN202110788536.4A CN113384288A (en) | 2021-07-13 | 2021-07-13 | Light cone beam CT scanning system and CT scanning method |
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