Respiratory gating test simulation device and emission computed tomography system

Abstract

The utility model provides a respiratory gating test simulation device and an emission computed tomography system, which are used for respiratory gating test of the emission computed tomography system, and comprise a cavity for accommodating an air bag for collecting physiological movement signals; the point source device is connected with the air bag and is used for placing a radiation point source; the movement mechanism is connected with the air bag and / or the point source device; and the driving source is connected with the movement mechanism and is used for driving the movement mechanism to move, so that the air bag and the point source device synchronously and periodically move under the driving of the movement mechanism. The respiratory gating test simulation device and the emission computed tomography system replace experimental animals to simulate respiration, use of the experimental animals is reduced, use of drugs is reduced, time for operators to make contact with radioactive sources is shortened, and occupational protection is facilitated. Simulation of different breathing cycles and breathing depths can be carried out, the stability is higher, and the cost is lower.

Description

TECHNICAL FIELD

[0001] The utility model relates to a breath gating testing device, in particular to a breath gating testing simulation device. BACKGROUND

[0002] At present, in the debugging process of preclinical PET / CT, breath gating test needs to be carried out, and then images can be more accurately collected to better control treatment.

[0003] When the breath gating function of the PET / CT device is tested, small animals are usually used to do the experiment with radioactive sources. Using small animals to do the experiment has the following disadvantages: high cost, experimental animals are relatively expensive; liquid radioactive drugs need to be used, which is difficult to obtain; the animal needs to be injected with radioactive drugs, and during the injection period, the operator contacts the radioactive source for a long time; the breathing cycle of different animals fluctuates greatly in depth, and the stability is poor. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art, and provide a breath gating test simulation device and emission computed tomography system which can freely simulate the depth of respiration and the breathing cycle.

[0005] The utility model solves the above technical problems through the following technical scheme: a breath gating test simulation device is used for breath gating test of an emission computed tomography system, and comprises:

[0006] A cavity is used for accommodating an air bag for collecting physiological motion signals.

[0007] A point source device is connected with the air bag and is used for placing a radioactive point source.

[0008] A motion mechanism is connected with the air bag and / or the point source device.

[0009] A driving source is connected with the motion mechanism and is used for driving the motion mechanism to move, so that the air bag and the point source device are driven by the motion mechanism to move periodically.

[0010] Preferably, the air bag and the point source device are driven by the motion mechanism to move periodically, including,

[0011] The point source device is driven by the motion mechanism to move periodically and reciprocally, so as to periodically compress and release the air bag, and the periodic and reciprocal movement has a preset amplitude and a preset period, and is used for simulating the breathing movement of a scanning object.

[0012] Preferably, the movement mechanism comprises a telescopic rod capable of telescopic movement back and forth under the driving of the driving source.

[0013] Preferably, the driving source comprises a driving motor, and the breath-gating test simulation device further comprises a control board connected with the driving motor and controlling the driving motor to periodically rotate forward and backward.

[0014] Preferably, the breath-gating test simulation device further comprises a housing comprising the cavity.

[0015] The point source device is also located in the cavity and abuts against the air bag, the movement mechanism is connected with the point source device, and the point source device can move along the cavity under the driving of the movement mechanism.

[0016] Preferably, the two ends of the cavity are respectively provided with limiting structures, a first limiting structure at one end is used to limit the movement position of the point source device.

[0017] A second limiting structure at the other end is used to limit the movement position of the air bag.

[0018] The first limiting structure and the second limiting structure prevent the point source device and the air bag from being pulled out of the cavity when moving along the cavity.

[0019] Preferably, the inner wall of the cavity constitutes a guide slide, and the point source device can move along the guide slide.

[0020] Preferably, the housing further comprises an axial part connected with the cavity, and the axial part is used to accommodate the movement mechanism.

[0021] Preferably, the air bag feeds back the amplitude and period of the periodic movement as a breath signal, and feeds back the breath signal to a breath-gating module of the emission computed tomography device.

[0022] The present disclosure also provides an emission computed tomography system comprising the breath-gating test simulation device according to any one of the above, a vital sign monitoring device, and an emission computed tomography device.

[0023] The air bag of the vital sign monitoring device is arranged in the cavity of the breath-gating test simulation device and is connected with the emission computed tomography device.

[0024] The emission computed tomography device controls the acquisition of images according to the breath signal acquired by the vital sign monitoring device.

[0025] The positive progress effect of the utility model lies in: the respiratory gating test simulation device and the emission computed tomography system can replace experimental animals to simulate respiration, thereby reducing the use of experimental animals, and the experimental animals do not need to be injected with drugs, reducing the use of drugs, further reducing the time of the operator contacting the radioactive source, and being beneficial to occupation protection. Different respiratory periods and respiratory depths can be simulated, the stability is higher, and the cost is lower. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic view of the respiratory gating test simulation device of an embodiment of the utility model;

[0027] Figure 2 It is a partial structure schematic view of the respiratory gating test simulation device of an embodiment of the utility model;

[0028] Figure 3 It is a system structure schematic view of the emission computed tomography system provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0029] The utility model will be described below in a preferred embodiment, and the utility model will be more clearly and completely illustrated by combining with the drawings.

[0030] As Figure 1 Indicated, it is a schematic view of the respiratory gating test simulation device of the utility model, and is used for the respiratory gating test of the emission computed tomography system. For example, any one of PET imaging system, SPECT imaging system, PET-CT imaging system, SPECT-CT imaging system.

[0031] The respiratory gating test simulation device, including cavity 1, is used for accommodating the air bag 10 of collecting physiological motion signal, preferably, the air bag 10 can be the air bag 10 of vital signs monitor (Vital Signs Monitor, VSM), the air bag 10 is used for periodic motion to collect the respiratory signal generated, is transferred to VSM equipment, and the respiratory signal is fed back to the respiratory gating module of the emission computed tomography device by the VSM equipment. When carrying out respiratory gating test, the emission computed tomography device controls the collection of image according to the respiratory signal.

[0032] Point source device 2 is connected with the air bag 10 and is used for placing radioactive point source, and the point source device 2 is in contact with the air bag 10. Preferably, the point source device 2 is provided with cavity and places radioactive point source.

[0033] The motion mechanism 3 is connected with the air bag 10 and / or the point source device 2, and drives the periodic movement of the point source device 2 and the air bag 10. Preferably, the motion mechanism 3 is connected with the point source device 2, and the point source device 2 is connected with the air bag 10.

[0034] The driving source 4 is connected with the motion mechanism 3, and drives the motion of the motion mechanism 3, so that the air bag 10 and the point source device 2 are driven by the motion mechanism 3 to move periodically.

[0035] Further, the air bag 10 and the point source device 2 are driven by the motion mechanism 3 to move periodically, which includes that the point source device 2 is driven by the motion mechanism 3 to move periodically and reciprocally, so as to periodically compress and release the air bag 10, and generate the breathing signal. The periodic and reciprocal movement has a preset amplitude and a preset period, which is used to simulate the breathing movement of the scanning object. Therefore, by the arrangement of the point source device 2 and the motion mechanism 3, the breathing movement of the scanning object can be simulated, and the amplitude and the period of the breathing can be adjusted as needed, so that the breathing signal is more stable, the cost of the breathing gating test is reduced, and the operator is prevented from contacting the radioactive source for a long time.

[0036] Further, the motion mechanism 3 includes a telescopic rod, which is driven by the driving source to move back and forth. The motion mechanism 3 can also include a cam, a gear or other common transmission mechanism, as long as it can realize the back and forth movement of the point source device 2 and the air bag 10.

[0037] The driving source 4 includes a driving motor, and the breathing gating test simulation device further includes a control panel 41 connected with the driving motor and controlling the driving motor to rotate periodically. Thus, the driving motor can drive the telescopic rod to move back and forth, and drive the point source device and the air bag to move periodically, so that the air bag generates the corresponding breathing signal.

[0038] As shown in Figure 1 , 2 The breathing gating test simulation device further includes a housing 100, which includes the cavity 1 and an axial portion 13 connected with the cavity 1. The air bag 10 is arranged in the cavity 1, and the point source device 2 is also arranged in the cavity 1 and abuts against the air bag 10. The motion mechanism 3 is connected with the point source device 2, and the point source device 2 can move along the cavity 1 under the driving of the motion mechanism 3. Preferably, the inner wall of the cavity forms a guide slide, and the point source device can move along the guide slide.

[0039] The two ends of the cavity 1 are respectively provided with limiting structures, a first limiting structure 11 at one end is used to limit the movement position of the point source device 2; the first limiting structure 11 is arranged at the end of the cavity 1 close to the point source device 2. A second limiting structure 12 at the other end is used to limit the movement position of the air bag 10; the second limiting structure 12 is arranged at the other end of the cavity 1 close to the air bag 10.

[0040] The first limiting structure 11 and the second limiting structure 12 prevent the point source device 2 and the air bag 10 from being pulled out of the cavity 1 when moving along the cavity 1.

[0041] The axial part 13 is connected with the cavity 1, the movement mechanism is located in the axial part 13, and the movement mechanism can reciprocate along the axial part 13. Preferably, the driving source can also be arranged in the axial part 13 in whole or in part.

[0042] The air bag feeds back the amplitude and period of the periodic movement as a breathing signal, and feeds back the breathing signal to a breathing gating module of the emission computed tomography device.

[0043] The breathing gating test simulation device can replace experimental animals to simulate breathing, thereby reducing the use of experimental animals, and also does not need to inject drugs into the experimental animals, reduces the use of drugs, and further reduces the time for the operator to contact the radioactive source, is beneficial to occupational protection. Different breathing periods and breathing depths can be simulated, the stability is higher, and the cost is lower.

[0044] The present disclosure also discloses an emission computed tomography system, such as Figure 3 As shown, the emission computed tomography system 1 comprises the above-mentioned breathing gating test simulation device 20, a vital sign monitoring device 30, and an emission computed tomography device 40.

[0045] The air bag of the vital sign monitoring device 30 is arranged in the cavity of the breathing gating test simulation device 20, and is connected with the emission computed tomography device 40.

[0046] The emission computed tomography device 40 controls the acquisition of images according to the breathing signal acquired by the vital sign monitoring device 30.

[0047] The air bag transmits the breathing signal obtained by the breathing gating test simulation device 20 to the gating module of the emission computed tomography device 40 via the VSM device 30, and then the emission computed tomography device 40 can control the acquisition of images according to the breathing signal to perform the breathing gating test.

[0048] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, but these changes and modifications all fall within the protection scope of the present application.

Claims

1. A breath-gated test simulation apparatus for emitting a breath-gated test of a computed tomography system, characterized by, The device comprises: a cavity for accommodating a gas bag for collecting physiological motion signals; a point source device connected with the gas bag for placing a radioactive point source; a motion mechanism connected with the gas bag and / or the point source device; a driving source connected with the motion mechanism for driving the motion mechanism to move, so that the gas bag and the point source device are synchronously moved periodically under the driving of the motion mechanism.

2. The breath-gated test analog device of claim 1, wherein, The synchronously periodic movement of the gas bag and the point source device under the driving of the motion mechanism comprises, periodic reciprocating movement of the point source device under the driving of the motion mechanism, so that the gas bag is periodically compressed and released, and the periodic reciprocating movement has a preset amplitude and a preset period for simulating the breathing motion of a scanning object.

3. The breath-gated test analog device of claim 1, wherein, The motion mechanism comprises a telescopic rod capable of reciprocating under the driving of the driving source.

4. The breath-gated test analog device of claim 1, wherein, The driving source comprises a driving motor, and the breathing-gated test simulation device further comprises a control board connected with the driving motor and controlling the driving motor to periodically reverse.

5. The breath-gated test analog device of claim 1, wherein, The breathing-gated test simulation device further comprises a housing comprising the cavity; The point source device is also located in the cavity and abuts against the gas bag, the motion mechanism is connected with the point source device, and the point source device can move along the cavity under the driving of the motion mechanism.

6. The breathing-gated test simulation device of claim 5, wherein limiting structures are arranged at two ends of the cavity respectively, a first limiting structure at one end is used for limiting the movement position of the point source device; a second limiting structure at the other end is used for limiting the movement position of the gas bag; The first limiting structure and the second limiting structure prevent the point source device and the gas bag from being pulled out of the cavity when moving along the cavity.

7. The breath-gated test analog device of claim 5, wherein, The inner wall of the cavity constitutes a guide slide, and the point source device can move along the guide slide.

8. The breath-gated test analog device of claim 5, wherein, The housing further comprises an axial portion connected with the cavity, and the axial portion is used for accommodating the motion mechanism.

9. The breath-gated test analog device of claim 1, wherein, The gas bag feeds back the amplitude and period of the periodic movement as a breathing signal, and feeds back the breathing signal to a breathing-gated module of an emission computed tomography device.

10. An emission computed tomography system characterized by, The device comprises the breathing-gated test simulation device, the vital sign monitoring device, and the emission computed tomography device according to any one of claims 1-9; The gas bag of the vital sign monitoring device is arranged in the cavity of the breathing-gated test simulation device and is connected with the emission computed tomography device; The emission computed tomography device controls the collection of images according to the breathing signal collected by the vital sign monitoring device.

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