CN112807010A - Portable limb joint single photon CT imaging system - Google Patents
Portable limb joint single photon CT imaging system Download PDFInfo
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- CN112807010A CN112807010A CN202110243825.6A CN202110243825A CN112807010A CN 112807010 A CN112807010 A CN 112807010A CN 202110243825 A CN202110243825 A CN 202110243825A CN 112807010 A CN112807010 A CN 112807010A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- 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 or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4405—Constructional features of apparatus for radiation diagnosis the apparatus being movable or portable, e.g. handheld or mounted on a trolley
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4429—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
- A61B6/505—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for diagnosis of bone
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Abstract
The invention discloses a portable limb joint single photon CT imaging system, comprising: the device comprises a supporting structure, a slip ring guide rail, an X-ray source, a Silicon Photomultiplier (Silicon Photomultiplier, referred to as "SiPM") detector module, a data acquisition module, a driving module, a processor, a power supply module and a communication module. The processor controls the driving module to drive the sliding ring guide rail rotating device and the guide rail horizontal moving device to synchronously operate, and drives the X-ray source on the sliding ring guide rail and the SiPM detector module to complete 360-degree spiral scanning. The arc SiPM detector with single photon detection sensitivity is adopted to detect X rays to realize large-area low-dose CT scanning imaging. The problems of high ray dose, inflexible equipment, high equipment cost, complex operation, long scanning time and the like in the traditional limb joint CT imaging are solved, and the method has the advantages of flexible operation, clear imaging, low radiation dose, short scanning time and the like.
Description
Technical Field
The invention relates to a device in the technical field of medical instruments, in particular to a portable limb joint single-photon CT imaging system.
Background
Ct (computed tomography), which is computed tomography, uses a precisely collimated X-ray beam and a high-sensitivity detector to perform cross-sectional scanning one by one around a certain part of a human body, thereby reconstructing a three-dimensional image of a focus part of the human body, and can be used for checking various diseases of the human body.
In clinical practice, CT imaging and magnetic resonance imaging are important medical means for diagnosing limb joint diseases. For limb joints, CT can obtain clear imaging of bones and joints and has good spatial resolution; the nuclear magnetic resonance technology has advantages for examining soft tissues such as articular cartilage, ligaments, meniscus, synovium and the like, but has poor spatial resolution. Therefore, limb joint imaging is mostly achieved using CT. When the CT imaging system scans the limb joints, the whole body needs to enter a scanning cavity, the equipment is large in size, can only be used for examination in a fixed place, and is inconvenient to move and use. Meanwhile, the CT technique has the following problems when used for examination: (1) the cost of the scanning equipment is high; (2) professional operation is required, and the operation flow is complex and tedious; (3) the scan takes a long time and tends to accumulate a large X-ray dose.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a portable limb joint single photon CT imaging system, solves the problems of high ray dose, inflexible equipment, high equipment cost, complex operation, long scanning time and the like in the traditional limb joint CT imaging, has the advantages of flexible operation, clear imaging, low radiation dose, short scanning time and the like, and is suitable for medical diagnosis of clinical limb joints and small animals.
The invention is realized by the following technical scheme: a portable limb joint single photon CT imaging device comprises: the device comprises a supporting structure, a slip ring guide rail, an X-ray source, a Silicon Photomultiplier (Silicon Photomultiplier, referred to as "SiPM") detector module, a data acquisition module, a driving module, a processor, a power supply module and a communication module;
the supporting structure is used for supporting and fixing the sliding ring guide rail and each module of the system;
the slip ring guide rail is used for carrying an X-ray source and an SiPM detector module;
the X-ray source is used for emitting an X-ray beam to be detected;
the SiPM detector module is used for detecting the X-rays emitted by the ray source and converting the X-rays into electric pulse signals;
the data acquisition module is used for acquiring the converted digital signals in real time;
the driving module is used for driving the X-ray source and the SiPM detector module on the slip ring guide rail to perform synchronous spiral rotary scanning;
the processor is used for controlling the operation of the X-ray source, the SiPM detector module, the driving module, the data acquisition module and the communication module;
the communication module is used for remote data transmission and remote operation control;
and the power supply module is used for providing a power supply required by the operation of the whole system circuit.
Further, the X-ray source can adjust the radiation dose and energy of X-rays through setting, comprises a front collimator, collimates the X-rays into a cone beam through constraint, and effectively matches with a detection window of the SiPM detector module.
Further, the X-ray source and the SiPM detector module are oppositely arranged on the slip ring guide rail at 180 degrees, and the mass difference between the X-ray source and the SiPM detector module is within a balance range through an external counterweight.
Further, the SiPM detector module includes: post-collimator, scintillator, SiPM detector.
Further, the post collimator is disposed above a detection window of the SiPM detector module, and is configured to limit a reception angle of each detector unit within a certain range, and to exclude interference of other non-related signals.
Further, the scintillator is used for converting X-rays into visible light signals to be detected by the SiPM detector.
Furthermore, the SiPM detector is used for converting the visible light signals into electric pulse signals, and meanwhile, the converted electric pulse signals are collected by the data acquisition module in real time.
Furthermore, the SiPM detector modules are distributed in an arc shape, so that the receiving area of the SiPM detector modules for X-rays is larger. The SiPM detector modules are arranged to form a detection array in a one-to-one coupling mode of SiPM detector units and scintillators.
Furthermore, the driving module is used for driving a sliding ring guide rail rotating device and a guide rail horizontal moving device, and the sliding ring guide rail rotating device drives an X-ray source on a sliding ring guide rail and the SiPM detector module to synchronously rotate through driving a mechanical gear; the guide rail horizontal moving device enables the sliding ring guide rail to move forwards along the length direction of the limb through a driving motor; and finally, the driving module drives the sliding ring guide rail rotating device and the guide rail horizontal moving device to synchronously operate, and drives the X-ray source and the SiPM detector module on the sliding ring guide rail to complete spiral scanning.
Furthermore, the data acquisition module, besides acquiring the detection signal output by the SiPM detector module, further includes a guide rail rotation speed sensor for acquiring the rotation speed of the guide rail in real time, and the acquired rotation speed data is used for CT image reconstruction.
Further, the processor further comprises an image processing module, and the image processing module is used for reconstructing and processing the real-time CT image of the digital signal acquired by the data acquisition module.
Further, the processor controls the driving module to adjust the rotating speed of the slip ring guide rail and the horizontal moving speed of the guide rail.
Further, the communication module comprises a data transmission unit and a remote control unit, wherein the data transmission unit comprises a Bluetooth module, a Wi-Fi module and a network card and can transmit the acquired data and the reconstructed CT image to the cloud; the remote control unit is connected in a Bluetooth mode or a network mode, and the system is controlled by a remote instruction input operation processor to realize scanning and CT image reconstruction and complete limb joint imaging.
Compared with the prior art, the invention has the following advantages:
1) the equipment has small volume, compact structure, low cost and flexible and convenient operation;
2) the scanning parts are concentrated, the scanning speed is high, and the imaging time consumption is short;
3) the SiPM has single photon detection sensitivity and imaging definition, and has low X-ray dosage and small harm to human bodies.
Drawings
FIG. 1 is a block diagram of an imaging portion of a portable limb joint CT imaging system according to the present invention;
FIG. 2 is an imaging schematic diagram of an imaging detector of the portable limb joint CT imaging system of the invention;
FIG. 3 is a schematic view of the overall imaging structure of the portable limb joint CT imaging system of the present invention;
FIG. 4 is a block diagram of a portable limb joint CT imaging system of the present invention;
FIG. 5 is a flow chart of the operation of the portable limb joint CT imaging system of the present invention;
in the figure: 1. the system comprises a driven gear, 2 an X-ray source coupled with a front collimator, 3 a slip ring guide rail, 4 an SiPM detector coupled with the front collimator and a scintillator, 5 a mechanical gear module, 6 a guide rail horizontal moving rail 7. the X-ray source, 8 a front collimator, 9 a rear collimator, 10 the scintillator, 11 an SiPM detector, 12 a display, 13 an operation end, 14 a power supply system and 15 a processing system.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which are provided for implementing the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.
Example 1
As shown in fig. 1 and 3, the present example includes: the system comprises a driven gear 1, an X-ray source 2 of a pre-coupling collimator 8, a slip ring guide rail 3, an SiPM detector 4 of a post-coupling collimator 9 and a scintillator 10, a mechanical gear module 5, a guide rail horizontal moving track 6, a display 12, an operating end 13, a power supply system 14 and a processing system 15, wherein: the X-ray source 3 and the SiPM detector 4 are arranged on the sliding ring guide rail 3 through connecting pieces, and meanwhile, gears in the mechanical gear module 5 are matched with a gear ring 14 on the annular gear ring guide rail 3.
The driven gear 1 rotates relatively along with the rotation, and is used for limiting the rotation space of the sliding ring guide rail 3, so that the sliding ring guide rail 3 rotates around the z axis smoothly.
The X-ray source 2 of the pre-coupling collimator 8, the SiPM detector 4 of the post-coupling collimator 9 and the scintillator 10 are mechanically fixed on the slip ring guide rail 3 and are oppositely arranged at 180 degrees.
The X-ray source 2 of the pre-coupling collimator 8 and the SiPM detector 4 of the post-coupling collimator 9 and the scintillator 10 are in a balance range after passing through external counterweights.
The power supply system 14 provides power for system driving, X-ray source operation, SiPM detector data conversion, data acquisition of the data acquisition module and processor control operation.
The processing system 14 comprises a processor, a communication module and a data acquisition module, and has functions of data acquisition, CT image reconstruction, image reconstruction and operation control.
The processing system 15 is connected with and controls the X-ray source 2 of the pre-coupling collimator, the SiPM detector 4 of the pre-coupling collimator and the scintillator, the mechanical gear module 5, the display 12 and the operation end 13.
The imaging principle of the device is as follows:
the X-ray source 7 emits X-ray beams, the X-ray beams are collimated into cone-shaped beams through the front collimator 8, and the collimated cone-shaped X-ray beams penetrate through limb joints. Since different tissues of the human body have different absorption coefficients for X-rays, the X-rays transmitted through the joints of the limbs are attenuated to different degrees. The transmitted X-ray beam is screened by the post-collimator 9, and interference of non-relevant signals is eliminated. The remaining valid signal is received by the scintillator 10 to fluoresce, and the number of photons output by the scintillation crystal is proportional to the energy of the incident X-rays. The weak fluorescence is detected by the SiPM detector 11 and amplified to form an electrical pulse signal. The height of the output pulse of the SiPM detector 11 may reflect the energy of the incident X-rays. The amplified electric signals are acquired, reconstructed by CT images and converted into digital images, and the digital images are stored in a processor according to a certain format.
The working process of the device is as follows:
as shown in fig. 1, a motor of the sliding ring guide rail rotating device drives a mechanical gear module 5 to rotate, the mechanical gear module 5 is matched with a gear ring of the sliding ring guide rail 3, so as to drive the sliding ring guide rail 3 to rotate, and realize synchronous rotation of an X-ray source 2 and an SiPM detector 4 on the sliding ring guide rail, meanwhile, the guide rail horizontal moving device drives the sliding ring guide rail 3 to advance on a guide rail horizontal moving track 6 along the z-axis direction, and a driving module drives the sliding ring guide rail rotating device and the guide rail horizontal moving device to synchronously run, thereby realizing 360-degree helical scanning of the CT scanning device.
The device comprises the following operation steps:
step 1: the operator adjusts the radiation dose and energy of the X-ray through the operation terminal according to the age and physical condition of the patient.
Step 2: the operator assists the patient in placing the limb in a pre-defined preferred imaging position for waiting to be scanned.
And step 3: an operator operates the CT scanning equipment to operate, and the scanning equipment carries out 360-degree spiral scanning on the limbs of a patient.
And 4, step 4: the signals formed by scanning are collected by the data acquisition module in real time, and CT image reconstruction and image definition optimization are carried out through the image processing module.
And 5: an operator judges whether the reconstructed and optimized image is clear or not; if not, repeating the steps 2, 3 and 4 until the image is clear.
Step 6: the operator exports the clear image and uploads the data to the database.
The above description is only an example of the present invention, and should not be taken as limiting the scope of the present invention, and all equivalent variations and modifications known to those skilled in the art can be made within the scope of the present invention.
Claims (10)
1. A portable limb joint single photon CT imaging device comprises: the device comprises a supporting structure, a sliding ring guide rail, an X-ray source, a Silicon Photomultiplier (SiPM for short) detector module, a driving module, a data acquisition module, a processor, a power supply module and a communication module;
the supporting structure is used for supporting and fixing the sliding ring guide rail and each module of the system;
the slip ring guide rail is used for carrying an X-ray source and an SiPM detector module;
the X-ray source is used for emitting an X-ray beam to be detected;
the SiPM detector module is used for detecting the X-rays emitted by the ray source and converting the X-rays into electric pulse signals;
the data acquisition module is used for acquiring the converted digital signals in real time;
the driving module is used for driving the X-ray source and the SiPM detector module on the slip ring guide rail to perform synchronous spiral rotary scanning;
the processor is used for controlling the operation of the X-ray source, the SiPM detector module, the driving module, the data acquisition module and the communication module;
the communication module is used for remote data transmission and remote operation control;
and the power supply module is used for providing a power supply required by the operation of the whole system circuit.
2. The portable single photon CT scanning apparatus of claim 1 wherein: the X-ray source can adjust the radiation dose and energy of X-rays through setting, comprises a front collimator, collimates the X-rays into a cone beam through constraint, and is effectively matched with a detection window of the SiPM detector module.
3. The portable single photon CT scanning apparatus of claim 1 wherein: the X-ray source and the SiPM detector module are oppositely arranged on the slip ring guide rail at 180 degrees, and the mass difference of the X-ray source and the SiPM detector module is within a balance range through an external counterweight.
4. The portable single photon CT scanning apparatus of claim 1 wherein: the SiPM detector module includes: a post-collimator, a scintillator, a SiPM detector;
the post collimator is arranged above a detection window of the SiPM detector module and used for limiting the receiving angle of each detector unit within a certain range and eliminating the interference of other non-relevant signals;
the scintillator is used for converting X-rays into visible light signals to be detected by the SiPM detector;
the SiPM detector is used for converting the visible light signals into electric pulse signals, and meanwhile, the converted electric pulse signals are collected by the data acquisition module in real time.
5. The portable single photon CT scanning apparatus of claim 1 wherein: the SiPM detector modules are distributed in an arc shape, so that the receiving area of the SiPM detector modules to X-rays is larger. The SiPM detector modules are arranged to form a detection array in a one-to-one coupling mode of SiPM detector units and scintillators.
6. The portable single photon CT scanning apparatus of claim 1 wherein:
the driving module is used for driving a sliding ring guide rail rotating device and a guide rail axial moving device, and the sliding ring guide rail rotating device drives an X-ray source on a sliding ring guide rail and the SiPM detector module to synchronously rotate through driving a mechanical gear;
the guide rail axial moving device enables the sliding ring guide rail to move forwards along the length direction of the limb through a driving motor; and finally, the driving module drives the sliding ring guide rail rotating device and the guide rail axial moving device to synchronously operate, and drives the X-ray source on the sliding ring guide rail and the SiPM detector module to complete spiral scanning.
7. The portable single photon CT scanning apparatus of claim 1 wherein: the data acquisition module is used for acquiring detection signals output by the SiPM detector module, and also comprises a guide rail rotating speed sensor used for acquiring the rotating speed of the guide rail in real time, and the acquired rotating speed data is used for CT image reconstruction.
8. The portable single photon CT scanning apparatus of claim 1 wherein: the processor also comprises an image processing module, and the image processing module is used for reconstructing and processing the real-time CT image of the digital signal acquired by the data acquisition module.
9. The portable single photon CT scanning apparatus of claim 1 wherein: the processor can control the driving module to adjust the rotating speed of the slip ring guide rail and the axial moving speed of the guide rail.
10. The portable single photon CT scanning apparatus of claim 1 wherein: the communication module comprises a data transmission unit and a remote control unit, wherein the data transmission unit comprises a Bluetooth module, a Wi-Fi module and a network card and can transmit the acquired data and the reconstructed CT image to the cloud; the remote control unit is connected in a Bluetooth mode or a network mode, and the system is controlled by a remote instruction input operation processor to realize scanning and CT image reconstruction and complete limb joint imaging.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110243825.6A CN112807010A (en) | 2021-03-05 | 2021-03-05 | Portable limb joint single photon CT imaging system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110243825.6A CN112807010A (en) | 2021-03-05 | 2021-03-05 | Portable limb joint single photon CT imaging system |
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Citations (8)
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| CN101001573A (en) * | 2004-08-12 | 2007-07-18 | 皇家飞利浦电子股份有限公司 | Computer tomography scanner having an adjustable rotational speed |
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| CN102697517A (en) * | 2012-06-25 | 2012-10-03 | 苏州生物医学工程技术研究所 | Mobile computed tomography (CT) scanner and operation method thereof |
| CN103462628A (en) * | 2012-09-20 | 2013-12-25 | 北京朗视仪器有限公司 | Radiation imaging device and method |
| CN104602608A (en) * | 2012-08-27 | 2015-05-06 | 皇家飞利浦有限公司 | Patient-specific and automatic x-ray system adjustment based on optical 3D scene detection and interpretation |
| WO2016029845A1 (en) * | 2014-08-26 | 2016-03-03 | 曹红光 | Static real-time ct imaging system and imaging control method |
| CN109091159A (en) * | 2018-07-06 | 2018-12-28 | 浙江大学 | Portable limbs joint cone-beam CT imaging system |
| CN215651188U (en) * | 2021-03-05 | 2022-01-28 | 中国计量大学 | Portable limb joint single photon CT imaging system |
-
2021
- 2021-03-05 CN CN202110243825.6A patent/CN112807010A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101001573A (en) * | 2004-08-12 | 2007-07-18 | 皇家飞利浦电子股份有限公司 | Computer tomography scanner having an adjustable rotational speed |
| CN101273898A (en) * | 2007-03-27 | 2008-10-01 | 通用电气公司 | Photon Counting CT Detectors Using Solid State Photomultipliers and Scintillators |
| CN102697517A (en) * | 2012-06-25 | 2012-10-03 | 苏州生物医学工程技术研究所 | Mobile computed tomography (CT) scanner and operation method thereof |
| CN104602608A (en) * | 2012-08-27 | 2015-05-06 | 皇家飞利浦有限公司 | Patient-specific and automatic x-ray system adjustment based on optical 3D scene detection and interpretation |
| CN103462628A (en) * | 2012-09-20 | 2013-12-25 | 北京朗视仪器有限公司 | Radiation imaging device and method |
| WO2016029845A1 (en) * | 2014-08-26 | 2016-03-03 | 曹红光 | Static real-time ct imaging system and imaging control method |
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| CN215651188U (en) * | 2021-03-05 | 2022-01-28 | 中国计量大学 | Portable limb joint single photon CT imaging system |
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