CN114553311A - Multi-light-path transmission calibration system and method for CT machine - Google Patents
Multi-light-path transmission calibration system and method for CT machine Download PDFInfo
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- CN114553311A CN114553311A CN202210165270.2A CN202210165270A CN114553311A CN 114553311 A CN114553311 A CN 114553311A CN 202210165270 A CN202210165270 A CN 202210165270A CN 114553311 A CN114553311 A CN 114553311A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 50
- 230000003287 optical effect Effects 0.000 claims abstract description 36
- 239000013307 optical fiber Substances 0.000 claims abstract description 23
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 12
- 238000010168 coupling process Methods 0.000 claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 claims abstract description 12
- 238000002591 computed tomography Methods 0.000 claims description 71
- 238000001514 detection method Methods 0.000 claims description 24
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012827 research and development Methods 0.000 description 3
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- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- 238000002583 angiography Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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Abstract
The application provides a multi-light-path transmission calibration system and method for a CT machine, and relates to the technical field of communication of CT equipment. The transmission calibration system consists of a transmitting end CT equipment end transmitting optical signal arranged on the inner wall of the CT rotor and a wide-angle receiving optical lens group, a small compensating lens, a light spot monitoring camera, a wavelength spectroscope, a small nutation compensating lens, a communication optical fiber coupler, an optical fiber power detector and the like arranged on a receiving end. The calibration process of three stages of light emission and receiving end initialization establishment, light spot dynamic stabilization and dynamic optical fiber coupling on the rotor of the CT machine is completed, and guarantee is provided for establishment of stable optical information transmission of the rotary joint of the CT machine.
Description
Technical Field
The invention belongs to the technical field of medical equipment communication information, and relates to a multi-light-path transmission calibration system and method for a CT (computed tomography) machine.
Background
Ct (computed tomography), namely, computed tomography, which uses precisely collimated X-ray beams, gamma rays, ultrasonic waves, etc. to scan the cross sections of a certain part of a human body one by one together with a detector with extremely high sensitivity, has the characteristics of fast scanning time, clear images, etc., and can be used for the examination of various diseases; the following can be classified according to the radiation used: x-ray CT (X-CT) and gamma-ray CT (gamma-CT).
The working process of the CT equipment comprises the following steps: the scanning part consists of an X-ray tube, a detector and a scanning frame, and is used for rotationally scanning a human body, and the X-ray detector receives signals; then, the information data collected by scanning is transmitted to a computer system for storage operation; and finally, displaying the CT image through the image processed and reconstructed by the computer. However, for the CT principle, images must be acquired by a scanning method, and now, a helical CT scan (helical CT scan) is developed. Therefore, the problem of information transmission of the rotary joint is faced, at present, the information is transmitted in a capacitive non-contact mode, the transmission speed is limited, a sufficiently large radiation antenna needs to be developed, and the requirement on volume power consumption is met.
2003 is a rapid development period of multi-slice helical CT, and in the north american radiological society, 32 slices and 40 slices were introduced by different manufacturers. In 2004, 64-layer spiral CT is a new bright spot for CT development, 64-layer CT is released successively by GE, Philips, Siemens and Toshiba, and the emergence of 64-row spiral CT creates a new era of noninvasive diagnosis of cardiovascular diseases, and can complete heart scanning in less than 5s, and the heart CT becomes a clinical routine. At present, the single-week scanning time of the multi-slice helical CT is shortened to a sub-second level, the multi-slice helical CT is widely applied to a plurality of fields such as angiography imaging, brain perfusion imaging, heart imaging and the like, and in addition, the multi-slice helical CT plays an important role in the aspects of radiotherapy planning, virtual endoscope technology and the like. In 2004, Toshiba has successfully developed 256-layer spiral CT. Since 2005, a large number of high-end medical CTs were successively developed. The main representatives are: siemens 'dual source spiral CT, Philips' 256-level polar CT, toshiba's 320 row 640 level CT, and GE's gem CT.
In the future, the CT data transmission mode will mainly be optical transmission, and the data rate will be further increased to 50Gbps due to the overall technology improvement of CT products, and at present, the transmission rate can only be achieved by optical transmission. Both Schlefflin and Mogo have developed research on photoelectric transmission, and Schlefflin and Mogo have successively promoted CT slip ring products at 10 Gbps.
The digital diagnosis and treatment equipment research and development special item '256-row 16-centimeter high-definition high-speed large-volume medical CT system and core technology research and development', research and development of a 10Gbps optical transmission system, which is applied to a CT host computer for arranging 12 paths of transmission and receiving by utilizing the circular motion of a reflector cavity, has complex system and large change on the existing CT equipment, and has large influence on the hollow position of the CT.
In the prior art, a multi-light path transmission calibration system and a multi-light path transmission calibration method of a CT device rotary joint are not available.
Disclosure of Invention
The invention solves the technical problems that: at the present stage, the data volume acquired by the CT device is getting larger and larger, the data transmission relying on the single-channel capacitive wireless contact gradually enters the bottleneck, and the transmission requirements of higher speed and low cost are obvious. The invention solves the problem of multi-channel high-speed CT equipment detection information transmission, and on the premise of not changing the internal layout of a CT host, the CT equipment is provided with a standardized multiplex interface, high-speed data is transmitted to a position outside the host by using optical carriers for receiving, and the receiving process needs to be firstly carried out with the installation and calibration process of a transmitting party and a receiving party.
The embodiment of the application provides a multi-light-path transmission calibration system for a CT machine, and relates to the technical field of communication of CT equipment. The device comprises an optical signal transmitting end and an optical signal receiving end, wherein the transmitting end internally comprises a laser light source, a photoelectric modulator, a light beam collimator, a WIFI receiving and transmitting and matching structure; the optical signal receiving end comprises a wide-angle receiving optical lens group, a micro compensating mirror, a light spot monitoring camera, a wavelength spectroscope, a micro nutation compensating mirror, a communication optical fiber coupler, an optical fiber power detector and a fixed mounting platform. The light signal transmitting end arranged on the inner wall of the CT rotor transmits signals through a certain distance to reach the light signal receiving end, the light signal receiving end is arranged in the middle of the fixed mounting platform connected with the connecting rod of the CT stator, and the light beam calibration process is carried out before the transceiving communication is established. The calibration method and the calibration device complete calibration processes of three stages of initialization establishment of light emission and receiving ends on a rotor of the CT machine, dynamic stabilization of light spots and dynamic optical fiber coupling, and provide guarantee for establishment of stable transmission of optical information of a rotary joint of the CT machine.
Optionally, the system further comprises a laser communication emission system, which includes an integrated light source, a photoelectric modulator, a beam splitter, a beam collimator, and a micro position detection module, and is specifically installed on a rotor of the CT host, wherein raw data obtained by X-ray detection or data obtained after microwave modulation can be loaded onto the optical wave by using a photoelectric direct modulation technique, and the data loading is performed according to an instruction, the beam splitter combines modulated beams of multiple laser sources with a calibration beam, the micro position detection module detects whether the retrospective light is received or not, and the different aperture is installed in close parallel with the beam collimator.
Optionally, the optical system further comprises a wide-angle receiving lens group for receiving the light beam emitted by the laser communication emission system, an optical corner reflector is arranged in the middle of a protective lens in the wide-angle receiving lens group, a transmission film is coated on the periphery of the protective lens, the converged and emitted light is projected onto the tiny compensation lens, and the light beam incident on the corner reflector is reflected onto the miniature position detection module of the laser communication emission system along the original light path.
Optionally, the system further comprises a calibration light which is received by the light spot monitoring camera and is separated by the beam splitter after being reflected by the small compensating mirror, the light spot monitoring camera receives the light spot and rotates along with the rotation of the CT host according to the rotation of the laser communication transmitting system, and the light spot is stabilized on the circle center of the rotating light spot ring by using the receiving small compensating mirror.
Optionally, a micro-nutation compensation mirror is further included to reflect the communication beam split by the beam splitter to the communication fiber coupler, and the detection value of the fiber power detector is dynamically maximized by utilizing the nutation coupling mode.
Optionally, the method further includes a multi-optical path transmission calibration method for the CT machine, and the specific steps are as follows: the work begins to start, the laser communication transmitting system only opens and marks the transmission of school light beam, project behind the wide-angle receiving lens group of receiver, the corner reflector in the receiving lens group can be with some light reflection back miniature position detection module among the laser transmitting system, the rotation along with the CT host computer makes the intensity of position detection module stable always, show that receiving and dispatching light beam has aimed at, wifi instruction opens unmodulated communication light beam again, the closed-loop control who utilizes little compensating mirror and facula surveillance camera makes the facula stable unchangeable, the closed-loop control who utilizes little nutation compensating mirror and optic fibre power detector again, restrain the environmental vibration, factors such as the unstable centroid of ring aureole, the optical fiber coupling efficiency is improved. Therefore, the calibration process of the multi-light path transmission of the CT machine is completed.
The high-speed data on the rotor of the CT machine is transmitted to a fixed position for receiving in a laser wireless communication mode, so that the purpose of optical transmission of a rotary joint of the CT machine is achieved, firstly, an optical corner reflector in a wide-angle receiving system is utilized to enable a receiving and transmitting module to be aligned to receive and transmit, and the mass center change of a circumferential rotary light spot is eliminated by utilizing the closed-loop control of a small compensating mirror and a light spot monitoring camera, so that the circular rotary light spot is stabilized on the circle center of a circumference. And the closed-loop control of the micro nutation compensating mirror and the optical fiber power detector is utilized to eliminate the instability of light spots and the vibration influence of the environment, the optical fiber coupling efficiency is improved, the optical transmission is stable in the calibration process, and the multi-path optical transmission is satisfied.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention does not change the internal layout of the CT host, only installs the light emission module with a standard interface, so that the CT collected data is transmitted at high speed, and utilizes the initial alignment mode of backtracking light to indicate the initialization of receiving and transmitting.
(2) The invention utilizes the closed-loop control of the micro compensation mirror and the light spot monitoring camera to eliminate the mass center change of the circumferential rotating light spot, so that the light spot is stabilized on the circle center of the circumference and the light spot at the circle center is unstable, and then utilizes the closed-loop control of the micro nutation compensation mirror and the optical fiber power detector to eliminate the instability of the light spot and the vibration influence of the environment, thereby finally improving the optical fiber coupling efficiency.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a diagram of a multi-light-path transmission calibration system provided in an embodiment of the present invention;
FIG. 2 is a flow chart of a multi-optical path transmission calibration method provided in an embodiment of the present invention;
fig. 3 is a calibration system diagram of a multi-optical path wavelength division multiplexing communication method according to an embodiment of the present invention;
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Fig. 1 shows a multi-optical path transmission calibration system diagram for a CT machine, which is suitable for a multi-optical path transmission calibration system for a CT machine, and is characterized by comprising: the device comprises a CT host 1, a laser communication transmitting system 2, a wide-angle receiving lens group 3, a micro compensating lens 4, a spectroscope 5, a facula monitoring camera 6, a micro nutation compensating lens 7, a communication optical fiber coupler 8, an optical fiber power detector 9, an optical angle reflector 10, a micro position detection module 11, a fixed mounting table 12 and a communication receiving module 13. The laser communication emission system 2 is installed on the side wall of the scanning rotor of the CT host machine 1, and comprises a micro position detection module for emitting multipath communication beams, emitting calibration beams and backtracking light, wherein the micro position detection module multiplexes X-ray detection acquisition in the CT host machine 1 into 1 path of original digital data, or converts the original digital data into microwave intermediate frequency signals to be modulated onto optical carriers, or loads the X-ray multichannel acquisition data onto the laser communication emission system 2 in a direct optical multiplexing mode, and the module can be freely changed according to the design without the limitation of a system method. The emitted light beam is projected to a receiver, the central axis of the receiver is on the central Z axis of the CT host 1, the retrospective light of an optical corner reflector 10 arranged at the front end of the wide-angle receiving lens group 3 judges whether the received light beam is aligned, the alignment mode is used for calibration in the initialization process of the communication transmission self-check of the CT equipment, and a micro position detection module 11 for judging the retrospective light is arranged in a manner that the different aperture is closely parallel to a light beam collimator in the laser communication emission system 2. The calibration beam divergence angle is larger than the communication beam divergence angle, the CT host 1 moves circularly, and whether light spots exist or not is judged according to the micro position detection module 11 so as to adjust the direction of the laser communication emission system 2, and the adjustment is relatively simple and is not repeated.
The wide-angle receiving lens group 3 adopts a 360-degree panoramic imaging optical system and adopts a long-focus converging mode, light beams need to be reflected by a tiny compensating mirror 4, the reflected light beams pass through a wavelength spectroscope 5, calibration light beams are separated and transmitted to a light spot monitoring camera 6, the focus of the calibration light beams is positioned at the light spot monitoring camera 6, the reflected light beams are communication light beams with a plurality of wave bands of 1.3um, 1.5um and 1.06um, light spots projected by the calibration light beams on the monitoring camera 6 are calculated, the mass center of the light spots is calculated, the mass center is connected into a circumferential ring according to the circumferential motion of the light spots, the circle center is calibrated according to the circumferential ring, and the circle center is not fixed due to a plurality of engineering construction factors such as the installation precision of a receiving party, the planeness precision of a fixed installation platform 12 and the like, so that the light spots are dynamically stabilized at the circle center position by adjusting the tiny compensating mirror 4, the angle of the uncertain axis corresponding to the position of the light spot at the center of the circle is alpha,
the micro nutation compensating mirror 7 starts spiral scanning in an optical fiber coupling nutation mode, the axial angle of the scanning is 1.5 alpha, light coupled into the communication optical fiber coupler 8 passes through the optical fiber power detector 9 to detect the coupled optical power until the maximum optical power is reached, and therefore the influences of environmental vibration, temperature and humidity change and the like on optical coupling can be reduced.
The CT data transmission requirement will be higher and higher, in which the optical communication adopts the wavelength division multiplexing as shown in fig. 3, and the wavelength spectroscope 5 continuously decomposes the parallel multi-wavelength nutation coupling mode, so as to realize the requirement of higher-speed CT data transmission. Certainly, more communication modes with high-efficiency bandwidth are also applicable to the system, the system realizes the calibration process before the establishment of a novel optical channel, and the relevance between the communication mode and the modulation and demodulation mode is not large.
As shown in fig. 2, the optical transmission flow chart of the rotary joint of the CT device provided in the embodiment of the present invention is applicable to a multi-optical path transmission calibration method for a CT machine, the transmitting side of the system is on the rotor of the CT host 1, and the receiving side is on the Z axis of the CT host, so that there is a calibration process of light beams at different locations, and a calibration process is necessary before complete communication is established, and the specific implementation steps are as follows:
(1) starting working, as shown in fig. 3, the laser communication emission system 2 installed on the rotor of the CT host 1 is instructed by the WiFi to start emitting the calibration light beam, the divergence angle of the light beam is larger than that of the communication light beam, the wavelength of the calibration light beam is 800nm, and the emission light beam is projected onto the protective lens of the wide-angle receiving lens group.
(2) The projected light beam part is traced back on the optical corner reflector 10, the size of the corner reflector is 6.2mm, whether the traced light is received or not is judged according to the micro position detection module 11, if the traced light is not received, the laser communication emission system 2 is adjusted, the micro position detection module 11 is enabled to emit light, then the WiFi instruction informs that the laser is started to emit an unmodulated communication light beam, and the CT host 1 is also started to rotate.
(3) The calibration light beam and the communication light beam pass through the wavelength spectroscope 5, transmitted 800nm calibration light is transmitted, the reflected light beam is a communication light beam with a plurality of wave bands of 1.3um, 1.5um and 1.06um, the facula monitoring camera 6 calibrates the circular ring of the facula along with the centroid position of the facula, thereby determining the uncertain area of the circle center position, the micro compensation mirror 4 adopts an MEMS two-dimensional rotating mirror, the resonant frequency of the rotating mirror is 5KHz, the rapid rotation enables the angle of the light beam to change, and therefore the facula is stabilized in the uncertain area of the circle center position.
(4) When the light spot reaches the uncertain area of the light spot, the corresponding axial uncertain angle is alpha, the micro nutation compensation mirror 7 is started, spiral scanning is started from the axial direction from inside to outside in the axial angle range of the 1.5 alpha light spot monitoring camera 6, the scanning pitch is 3urad, the micro nutation compensation mirror also adopts an MEMS mirror, the frequency is 5kHz, the optical fiber power detector 9 continuously detects the power optical power and memorizes according to the maximum position, then spiral scanning is carried out from inside to outside by taking the axial angle center as the axial angle center, the scanning range ensures the power maximization of the optical power detector 9, and the coupling efficiency with stable optical power can be ensured by repeating the steps.
(5) Then the WiFi instruction informs that the laser modulation communication light beam is started, and the CT host 1 can collect data and work normally, and then (3) is carried out.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications and the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention, and the corresponding technical solutions are all covered in the claims and the specification of the present invention.
Claims (6)
1. A multi-light path transmission calibration system for a CT machine solves the problem of real-time data transmission in the medical CT scanning process, and is characterized by comprising the following steps: the device comprises a CT host (1), a laser communication emission system (2), a wide-angle receiving lens group (3), a micro compensating lens (4), a spectroscope (5), a light spot monitoring camera (6), a micro nutation compensating lens (7), a communication optical fiber coupler (8), an optical fiber power detector (9), an optical corner reflector (10), a micro position detection module (11), a fixed mounting table (12) and a communication receiving module (13).
2. The multi-light path transmission calibration system for the CT machine according to claim 1, wherein: the laser communication emission system (2) comprises an integrated light source, a photoelectric modulator, a spectroscope, a beam collimator and a micro position detection module, and is specifically installed on a rotor of a CT host (1), original data obtained by X-ray detection or data obtained by microwave modulation can be loaded on light waves by using a photoelectric direct modulation technology, data loading is carried out according to instructions, the spectroscope combines modulated light beams of a plurality of paths of laser sources with a calibration light beam, the micro position detection module (11) detects whether a backtracking light is received or not, and a different aperture and the beam collimator are installed in a tight parallel mode.
3. The multi-light path transmission calibration system for the CT machine according to claim 1, wherein: the wide-angle receiving lens group (3) is used for receiving light beams emitted by the laser communication emission system (2), an optical corner reflector (10) is arranged in the middle of a protective lens in the wide-angle lens group, a transmission film is plated on the periphery of the protective lens, emergent light is converged and projected onto the micro compensation lens (4), and the light beams incident on the corner reflector are reflected onto a micro position detection module (11) of the laser communication emission system (2) along an original light path.
4. The multi-light path transmission calibration system for the CT machine according to claim 1, wherein: the light spot monitoring camera (6) receives calibration light which is separated by the spectroscope (5) through light reflected by the micro compensation mirror (4), the light spot monitoring camera (6) receives light spots and rotates according to the rotation of the laser communication emission system (2) along with the CT host (1), and the light spots are stabilized on the center of a circle of a rotating light spot ring by the aid of the receiving micro compensation mirror (4).
5. The multi-light path transmission calibration system for the CT machine according to claim 1, wherein: the micro-nutation compensating mirror (7) reflects the communication light beam separated by the spectroscope (5) to the communication optical fiber coupler (8), and the detection value of the optical fiber power detector (9) is enabled to be maximum dynamically by utilizing a nutation coupling mode.
6. A multi-light path transmission calibration method for a CT machine is characterized by comprising the following steps: the multi-light path transmission calibration system of any one of claims 1-5 is adopted, and the specific steps are as follows: the work starts, the laser communication emission system (2) only starts the emission of calibration light beams, after the light is projected to the wide-angle receiving lens group (3) of the receiving party, a corner reflector in the receiving lens group can reflect part of light to the miniature position detection module (11) in the laser emission system, the intensity of the position detection module is always stable along with the rotation of the CT host (1), the fact that the light beams are received and transmitted is aligned is shown, wifi instructions start unmodulated communication light beams, the light spots are stable and unchanged through the closed-loop control of the micro compensation mirror (4) and the light spot monitoring camera (6), the closed-loop control of the micro nutation compensation mirror (7) and the optical fiber power detector (9) is utilized, factors such as environmental vibration and unstable centroid of the circular light ring are suppressed, the optical fiber coupling efficiency is improved, and the calibration process of multi-path transmission of the CT machine is completed.
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| CN202210165270.2A CN114553311A (en) | 2022-02-18 | 2022-02-18 | Multi-light-path transmission calibration system and method for CT machine |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1668254A (en) * | 2002-08-13 | 2005-09-14 | 通用电气公司 | Medical device positioning system and method |
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| CN113726441A (en) * | 2021-08-30 | 2021-11-30 | 陕西周源光子科技有限公司 | Rotary joint optical transmission system for medical CT machine |
| CN113812971A (en) * | 2021-08-27 | 2021-12-21 | 浙江大学 | Multi-degree-of-freedom four-dimensional dual-energy cone-beam CT imaging system and method |
-
2022
- 2022-02-18 CN CN202210165270.2A patent/CN114553311A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1668254A (en) * | 2002-08-13 | 2005-09-14 | 通用电气公司 | Medical device positioning system and method |
| CN105361900A (en) * | 2014-08-26 | 2016-03-02 | 曹红光 | Static realtime CT (computed tomography) imaging system and imaging control method thereof |
| CN113812971A (en) * | 2021-08-27 | 2021-12-21 | 浙江大学 | Multi-degree-of-freedom four-dimensional dual-energy cone-beam CT imaging system and method |
| CN113726441A (en) * | 2021-08-30 | 2021-11-30 | 陕西周源光子科技有限公司 | Rotary joint optical transmission system for medical CT machine |
Non-Patent Citations (1)
| Title |
|---|
| 李巧等: "同步辐射双能CT图像的高精度配准研究", 光学学报, vol. 36, no. 4, 10 April 2016 (2016-04-10) * |
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