CN103845070A - PET-CT (positron emission tomography-computed tomography) scanning device and control method of PET-CT scanning device - Google Patents
PET-CT (positron emission tomography-computed tomography) scanning device and control method of PET-CT scanning device Download PDFInfo
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- CN103845070A CN103845070A CN201210521265.7A CN201210521265A CN103845070A CN 103845070 A CN103845070 A CN 103845070A CN 201210521265 A CN201210521265 A CN 201210521265A CN 103845070 A CN103845070 A CN 103845070A
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Abstract
The invention discloses a PET-CT (positron emission tomography-computed tomography) scanning device and a control method of the PET-CT scanning device. The PET-CT scanning device comprises a CT machine and a PET machine, wherein a luminous screen is arranged at a connecting part of the CT machine and the PET machine, the PET machine comprises a rebuilding computer, a coincidence circuit board and a PET control circuit board, the PET control circuit board is connected with the coincidence circuit board, the coincidence circuit board is connected with the rebuilding computer, and the PET control circuit board is connected with a driving circuit board of the luminous screen. The PET-CT scanning device and the control method of the PET-CT scanning device provided by the invention have the advantages that the body position change information of patients can be obtained through collecting light environment signal changes, so the scanning mages can be more accurately rebuilt.
Description
Technical field
The present invention relates to a kind of armarium and control method thereof, relate in particular to a kind of PET-CT scanning means and control method thereof.
Background technology
PET-CT is by the imaging of PET(positron emission tomoscan) and CT(Computed tomography) combine, use the same examinating couch reconstructing computer different with two, provide by PET function and the metabolism equimolecular information that focus is detailed, and CT provides the precise anatomical location of focus, a video picture by PET image and CT image co-registration, can obtain the faultage image in the each orientation of whole body, have sensitive, accurately, the features such as special and registration, can show pathophysiological change and the morphosis of focus simultaneously, obviously improve the accuracy of diagnosis, the object that reaches early discovery focus and diagnose the illness.PET/CT due to patient respiration, causes the same position of health in scanning process not in same position in scanning process, therefore needs a kind of means to obtain the breathing state of patient in scanning process.
PET/CT scanning is now installed a sensor at patient, when patient respiration, can be with dynamic sensor to produce and move up and down, a waveform of sensor output, as shown in Figure 1, by this waveform is sampled and obtained pulse signal, obtain the kinestate of patient in scanning process.This employing approach sensor obtains the kinestate of patient in scanning, and owing to being subject to, patient influence factor is excessive, and therefore accuracy is not high, and places sensor on patient's body, comparatively loaded down with trivial details.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of PET-CT scanning means and control method thereof, change in location information that can Obtaining Accurate patient body part in scanning process, thus it is more accurate to make to reconstruct the image coming.
The present invention solves the problems of the technologies described above the technical scheme adopting to be to provide a kind of PET-CT scanning means, comprises CT machine and PET machine, and wherein, the junction of described CT machine and PET machine is provided with luminescent screen.
Above-mentioned PET-CT scanning means, wherein, described PET machine comprises reconstructing computer, coincident circuit plate and PET control circuit board, described PET control circuit board is connected with coincident circuit plate, described coincident circuit plate is connected with reconstructing computer, and the drive circuit board of described PET control circuit board and luminescent screen is connected.
Above-mentioned PET-CT scanning means, wherein, described luminescent screen is LED luminescent screen, comprises LED drive circuit plate and multiple LED, described PET control circuit board is connected with multiple LED by LED drive circuit plate.
Above-mentioned PET-CT scanning means, wherein, described multiple LED arrange in the form of a ring and distribute along the circumferencial direction of the annular mechanical cover of the junction of CT machine and/or PET machine.
Above-mentioned PET-CT scanning means, wherein, described CT machine is monolayer spiral CT or multi-layer spiral CT.
The present invention, for solving the problems of the technologies described above the control method that a kind of above-mentioned PET-CT scanning means is also provided, wherein, comprises the steps: a) to regulate the brightness of luminescent screen, makes the brightness flop of luminescent screen and patient's breath rhythm consistent; B) the brightness flop signal of PET control circuit board collection luminescent screen is issued coincident circuit plate; C) coincident circuit plate is converted into respiration gate control information by described brightness flop signal and sends to reconstructing computer; D) reconstructing computer obtains the various breathing states of patient in scanning process according to respiration gate control information, and reconstructs the image of patient under various breathing states.
The control method of above-mentioned PET-CT scanning means, wherein, described luminescent screen is LED luminescent screen, comprises LED drive circuit plate and multiple LED, described LED drive circuit plate is by changing the dutycycle of pulsewidth modulation and the brightness of FREQUENCY CONTROL adjusting LED.
The control method of above-mentioned PET-CT scanning means, wherein, described respiration gate control information comprises various breathing states, described various breathing states comprise exhales or air-breathing state, the frequency of the strong and weak and breathing of breathing.
The control method of above-mentioned PET-CT scanning means, wherein, in respiration gate control information, the light and shade state of described luminescent screen is corresponding exhales or air-breathing state, the corresponding power of breathing of power of the brightness of described luminescent screen, the corresponding frequency of breathing of frequency that described luminescent screen light and shade changes.
The control method of above-mentioned PET-CT scanning means, wherein, the power of described breathing is in respiration, to suck or the gas flow of exhalation and the persistent period of respiration.
The present invention contrasts prior art following beneficial effect: PET-CT scanning means provided by the invention and control method thereof, obtain patient's body part change information by the signal intensity that gathers luminous environment, thereby can rebuild more exactly scanogram.
Brief description of the drawings
Fig. 1 is the patient of the existing sensor acquisition kinestate schematic diagram in scanning;
Fig. 2 is the structural representation of PET-CT scanning means of the present invention;
Fig. 3 is the circuit controlling party block diagram of luminescent screen in PET-CT scanning means of the present invention;
Fig. 4 is the control flow schematic diagram of PET-CT scanning means of the present invention.
In figure:
1 CT machine 2 PET machine 3 examinating couches
4 luminescent screen 5 reconstructing computer 21 PET control circuit boards
22 coincident circuit plate 41 LED 42 LED drive circuit plates
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 2 is the structural representation of PET-CT scanning means of the present invention.
Refer to Fig. 2, PET-CT scanning means provided by the invention comprises CT machine 1 and PET machine 2, and wherein, the junction of described CT machine 1 and PET machine 2 is provided with the luminescent screen 4 of brightness-adjustable.Described PET-CT scanning means also comprises examinating couch 3, and examinating couch 3 moves between CT machine 1 and PET machine 2.
Above-mentioned PET-CT scanning means, described CT machine 1 can be monolayer spiral CT or multi-layer spiral CT.Described PET machine 2 comprises reconstructing computer 5, coincident circuit plate 22 and PET control circuit board 21, described PET control circuit board 21 is connected with coincident circuit plate 22, described coincident circuit plate 22 is connected with reconstructing computer 5, and described PET control circuit board 21 is connected with the drive circuit board of luminescent screen 4.Described luminescent screen 4 can be electric filament lamp or fluorescent lamp, is preferably LED(light emitting diode) luminescent screen.LED luminescent screen comprises LED drive circuit plate 42 and multiple LED 41, and described PET control circuit board 21 is connected with multiple LED 41 by LED drive circuit plate 42, as shown in Figure 3.Certainly, luminescent screen 4 also can adopt independently driving device, or drives by the main control board of CT machine 1, as long as ensure that brightness can regulate as required, this is no longer going to repeat them.
The concrete layout of luminescent screen 4 and position arrange as long as ensure that patient, in scanning process, can see the light that luminescent screen 4 emits.As preferred embodiments, multiple LED 41 preferably arrange in the form of a ring and distribute along the circumferencial direction of the annular mechanical cover of the junction of CT machine 1 and/or PET machine 2, make patient can see from all angles the light that luminescent screen 4 emits, and compact in structure.
In existing PET-CT scanning process, patient is in a pitch-dark environment, in the environment of this dark, likely can cause patient nervous, and patient body is in a kind of random kinestate, can badly influence like this verity of rebuilding image.And PET-CT scanning means provided by the invention and control method thereof, patient is in scanning process, can see the light that luminescent screen 4 emits, thereby can adopt luminous environment guiding patient respiration, make patient be in a kind of luminous environment of warmth, not only attractive in appearance but also can make patient scan under a kind of state loosening.Concrete control procedure as shown in Figure 4, comprises the steps:
Step S401: regulate the brightness of luminescent screen 4, make the brightness flop of luminescent screen 4 and patient's breath rhythm consistent; As train guiding patient to change breath rhythm according to the brightness flop of luminescent screen 4; The brightness of luminescent screen 4 is by PWM(pulsewidth modulation) control, such as for LED luminescent screen, PET control circuit board 21 is by I/O(input/output port) output level is to LED drive circuit plate 42, by changing dutycycle and the frequency of PWM, can change the voltage of LED41, thereby regulate the brightness of LED 41;
Step S402: the brightness flop signal that PET control circuit board 21 gathers luminescent screen 4 is simultaneously issued coincident circuit plate 22;
Step S403: coincident circuit plate 22 is converted into respiration gate control information by described brightness flop signal and sends to reconstructing computer 5, exports a coincidence pulse to reconstructing computer 5; Respiration gate control information specifically comprises various breathing states, and various breathing states comprise exhales or suction condition, the frequency of the strong and weak and breathing of breathing; The power of breathing is mainly in respiration and sucks or the gas flow of exhalation and the persistent period of respiration; Respiratory frequency refers to the number of times of breathing per minute, calculates chest and the abdominal part of wanting close observation patient when respiratory frequency, and once air-breathing to add once expiration be exactly respiration, and it is masked as a secondary fluctuation of chest, and the chest not obvious person that rises and falls, can rise and fall to judge by abdominal part.In order to meet better different patients' measurement needs, can measure the respiratory intensity and the frequency that count different crowd in advance, and set up the corresponding relation of respiratory intensity, frequency and luminosity, light and shade change frequency, when actual test again according to the selected corresponding luminosity of patient's situation and light and shade change frequency.
Step S404: reconstructing computer 5 obtains the various breathing states of patient in scanning process according to respiration gate control information, and reconstruct the image of patient under various breathing states.In respiration gate control information, the light and shade state of luminescent screen 4 is corresponding exhales or air-breathing state, corresponding expiration state as bright in lamp, the dark corresponding suction condition of lamp; Or the bright corresponding suction condition of lamp, the dark corresponding expiration state of lamp.The corresponding power of breathing of the power of the brightness of luminescent screen 4, the brighter display of luminescent screen 4, lasting time of respiration is also corresponding longer, in respiration, suck like this or the gas flow of breathing out also more.The corresponding frequency of breathing of frequency that the light and shade of luminescent screen 4 changes, both will be consistent substantially.When reconstruction, can obtain patient's body part change information according to patient's breathing state, such as patient's respiratory frequency and the fluctuating frequency of patient body consistent, in patient's respiration suck or breathe out gas flow, the persistent period of respiration and the relief intensity of patient body consistent.Can reconstruct very accurately like this patient's scanogram, even can obtain the dynamic image scanning of 3D.
In sum, PET-CT scanning means provided by the invention and control method thereof, make patient do different breathings according to luminous environment brightness flop, patient's breathing state is corresponding with the brightness flop of luminous environment, like this by gathering the signal intensity of luminous environment, patient's breathing state can be obtained, thereby patient's body part change information can be obtained.Be that a kind of active on purpose guides patient to do regular breathing owing to adopting luminous environment guiding patient respiration, therefore can reconstruct very accurately patient's scanogram.
Although the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is worked as with being as the criterion that claims were defined.
Claims (10)
1. a PET-CT scanning means, comprises CT machine (1) and PET machine (2), it is characterized in that, the junction of described CT machine (1) and PET machine (2) is provided with luminescent screen (4).
2. PET-CT scanning means as claimed in claim 1, it is characterized in that, described PET machine (2) comprises reconstructing computer (5), coincident circuit plate (22) and PET control circuit board (21), described PET control circuit board (21) is connected with coincident circuit plate (22), described coincident circuit plate (22) is connected with reconstructing computer (5), and described PET control circuit board (21) is connected with the drive circuit board of luminescent screen (4).
3. PET-CT scanning means as claimed in claim 2, it is characterized in that, described luminescent screen (4) is LED luminescent screen, comprises LED drive circuit plate (42) and multiple LED(41), described PET control circuit board (21) is by LED drive circuit plate (42) and multiple LED(41) be connected.
4. PET-CT scanning means as claimed in claim 3, is characterized in that, described multiple LED(41) arrange in the form of a ring and distribute along the circumferencial direction of the annular mechanical cover of the junction of CT machine (1) and/or PET machine (2).
5. PET-CT scanning means as claimed in claim 1, is characterized in that, described CT machine (1) is monolayer spiral CT or multi-layer spiral CT.
6. a control method for PET-CT scanning means as claimed in claim 2, is characterized in that, comprises the steps:
A) brightness of adjusting luminescent screen (4), makes the brightness flop of luminescent screen (4) and patient's breath rhythm consistent;
B) the brightness flop signal of PET control circuit board (21) collection luminescent screen (4) is issued coincident circuit plate (22);
C) coincident circuit plate (22) is converted into respiration gate control information by described brightness flop signal and sends to reconstructing computer (5);
D) reconstructing computer (5) obtains the various breathing states of patient in scanning process according to respiration gate control information, and reconstructs the image of patient under various breathing states.
7. the control method of PET-CT scanning means as claimed in claim 6, it is characterized in that, described luminescent screen (4) is LED luminescent screen, comprise LED drive circuit plate (42) and multiple LED(41), described LED drive circuit plate (42) regulates LED(41 by changing the dutycycle of pulsewidth modulation and FREQUENCY CONTROL) brightness.
8. the control method of PET-CT scanning means as claimed in claim 6, is characterized in that, described respiration gate control information comprises various breathing states, and described various breathing states comprise exhales or air-breathing state, the frequency of the strong and weak and breathing of breathing.
9. the control method of PET-CT scanning means as claimed in claim 8, it is characterized in that, in described respiration gate control information, the corresponding expiration or air-breathing state of light and shade state of described luminescent screen (4), the corresponding power of breathing of power of the brightness of described luminescent screen (4), the corresponding frequency of breathing of frequency that described luminescent screen (4) light and shade changes.
10. the control method of PET-CT scanning means as claimed in claim 9, is characterized in that, the power of described breathing is in respiration, to suck or the gas flow of exhalation and the persistent period of respiration.
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| CN105433968A (en) * | 2014-09-18 | 2016-03-30 | 西门子公司 | Arrangement and method for outputting light signals at a medical-technical installation |
| US9990718B2 (en) | 2016-02-29 | 2018-06-05 | Shanghai United Imaging Healthcare Co., Ltd. | System and method for reconstructing ECT image |
| CN109035355A (en) * | 2017-07-10 | 2018-12-18 | 上海联影医疗科技有限公司 | System and method for PET image reconstruction |
| WO2019214744A1 (en) * | 2018-05-11 | 2019-11-14 | Shanghai United Imaging Healthcare Co., Ltd. | Systems, methods, computing devices, and storage media for medical examination |
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| CN109035355A (en) * | 2017-07-10 | 2018-12-18 | 上海联影医疗科技有限公司 | System and method for PET image reconstruction |
| CN109035355B (en) * | 2017-07-10 | 2023-09-01 | 上海联影医疗科技股份有限公司 | System and method for PET image reconstruction |
| WO2019214744A1 (en) * | 2018-05-11 | 2019-11-14 | Shanghai United Imaging Healthcare Co., Ltd. | Systems, methods, computing devices, and storage media for medical examination |
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