CN110946580B - NMR detection system - Google Patents

Abstract

The invention discloses a nuclear magnetic resonance detection system, which is provided with a nuclear magnetic resonance scanning device and a sliding bed. A sound-proof cabin made of non-magnetic material is placed on the sliding bed. The sound-proof cabin is provided with a one-way sound transmission channel, and the one-way sound transmission The channel connects the inside and the outside of the soundproof cabin, and a sound transmission direction switching device is arranged inside the channel. The soundproof cabin is used to isolate the noise during the examination, so as to prevent the noise from affecting the fetus and the pregnant woman, and the pregnant woman in the soundproof cabin can communicate with the doctor through the one-way sound transmission channel.

Description

NMR detection system

technical field

The invention relates to the field of measurements for diagnostic purposes, in particular to nuclear magnetic resonance measurements.

Background technique

Every pregnant woman undergoes multiple ultrasound examinations during pregnancy to determine fetal growth. Ultrasound examination is a medical imaging diagnosis technology based on ultrasound. Its main principle is to make the ultrasound probe scan the uterus of pregnant women. During the scanning process, the ultrasound probe will continuously emit ultrasound and receive the reflected ultrasound after encountering the fetus. Determine the condition of the fetus. Although ultrasonography is routine, fetal images are blurry. Therefore, MRI is often used to examine the fetus when clear images of the fetus are required.

The MRI machine will generate a lot of noise when it is working. The noise will not only affect the emotions of pregnant women, but also have a certain impact on the development of the fetus. It is easy to cause fetal movement and interfere with the quality of MRI images and the inspection process. In order to solve this problem, the prior art usually uses a semi-closed sound insulation device to reduce the impact of noise on the fetus, and at the same time through earplugs to reduce the impact of noise on pregnant women. ).

Although the existing sound insulation device can play a certain sound insulation effect, noise can still enter the sound insulation device along the unclosed position, therefore, the sound insulation effect of the existing sound insulation device is not good. Moreover, during the MRI examination, the doctor needs to communicate with the pregnant woman from time to time to guide the pregnant woman to perform the examination in the correct way. Therefore, the pregnant woman needs to repeatedly take and take the earplugs, which will also have a huge impact on the mood of the pregnant woman.

Contents of the invention

In order to solve the above technical problems, the present invention provides a nuclear magnetic resonance detection system, which can form a closed sound-proof space within the whole body of pregnant women, avoiding the noise generated by nuclear magnetic resonance from affecting pregnant women and fetuses, and can be used when doctors need to communicate with pregnant women. , to establish a sound channel between the interior of the soundproof cabin and the outside world, so that the doctor can communicate with the pregnant woman.

The technical solution is as follows:

A nuclear magnetic resonance detection system is provided with a nuclear magnetic scanning device and a sliding bed. A soundproof cabin made of non-magnetic material is placed on the sliding bed. The soundproof cabin is provided with a one-way sound transmission channel, and the one-way sound transmission channel communicates with the The interior and exterior of the above-mentioned soundproof cabin, and a sound transmission direction switching device is installed inside the passage.

In the first practicable manner, the sound transmission direction switching device includes an upper plane and a lower plane arranged in parallel, and the upper plane and the lower plane are provided with corresponding reflection devices and metasurface devices, and the reflection device is provided with reflection The slope and the switching mechanism, the reflecting surface of the reflecting slope faces the channel opening of the one-way sound transmission channel, and forms an angle of 135 degrees with the corresponding plane, the switching mechanism is used to drive the reflecting slope to rotate, and switch the direction of the reflecting slope the channel opening;

The metasurface device is provided with a reflecting plate and a driving mechanism, and two acoustic metasurfaces are arranged on the surface of the reflecting plate, and the two acoustic metasurfaces are respectively corresponding to the two sound transmission directions of the one-way sound transmission channel , the driving mechanism drives the reflector to switch between two acoustic metasurfaces.

In combination with the first possible way, in the second possible way, the switching mechanism is provided with two linked telescopic rods, the fixed ends of the two telescopic rods are fixed to the corresponding planes, and the other ends are respectively connected to the reflective The upper and lower ends of the board are hinged.

In the third practicable manner, the sound transmission direction switching device is provided with two one-way sound transmission ducts, the sound transmission directions of the two one-way sound transmission ducts are opposite, and they are arranged side by side in the one-way sound transmission channel Inside, a soundproof door is provided at the pipe opening of each one-way sound transmission pipe, and the two soundproof doors are connected by an interlocking mechanism.

In a fourth possible implementation manner, the soundproof cabin is provided with a tank bottom and a tank cover, one side of the tank cover is hinged to the tank bottom, and a sound insulation pad is provided on the edge of the tank cover.

With reference to the fourth possible realization, in the fifth possible realization, the canopy is made of a transparent sound-insulating material.

In the sixth possible implementation, the detection device is also provided with a physiological monitoring device, and the monitoring sensor of the physiological monitoring device is arranged in the soundproof cabin, and the bulkhead of the soundproof cabin is provided with a wire hole, and the monitoring sensor The signal wire passes through the soundproof cabin along the wire hole and is connected with the monitoring terminal of the physiological monitoring device.

In combination with any one of the first to sixth possible ways, in the eighth possible way, the detection device is also provided with an air conditioning device, and the air conditioning device is provided with an exhaust device and an oxygen concentration adjustment device , the exhaust port of the exhaust device, and the air supply port of the oxygen concentration adjustment device are respectively connected to the soundproof cabin through the ventilation hose, and the oxygen concentration sensor of the oxygen concentration adjustment device is arranged between the sound insulation cabin and the exhaust device. in the breather hose between them.

Beneficial effect:

1. It can form a closed sound-proof space to isolate the noise during the MRI examination and prevent pregnant women and fetuses from being affected by the noise.

2. Pregnant women can keep in touch with the outside world during the examination.

3. No need to change the structure of the existing nuclear magnetic resonance equipment, it is convenient to modify the existing equipment, and the use of the existing nuclear magnetic resonance equipment will not be affected after the modification.

4. It can adjust the oxygen concentration in the soundproof cabin to improve the safety and comfort of pregnant women.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of sound insulation cabin 3;

Fig. 3 is a structural schematic diagram of the sound transmission direction switching device in Embodiment 1;

FIG. 4 is a schematic structural view of the reflecting plate 12 in FIG. 3;

Fig. 5 is a schematic diagram of the sound propagation direction of the one-way sound transmission channel 4 in embodiment 1;

Fig. 6 is a schematic diagram of the sound propagation direction opposite to that of Fig. 5;

Fig. 7 is a schematic structural diagram of the second embodiment.

Detailed ways

The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

Embodiment one, the structural representation of nuclear magnetic resonance detection system as shown in Figure 1, this detection device is provided with nuclear magnetic scanning device 1 and sliding bed 2, and the soundproof cabin 3 that non-magnetic material is placed on this sliding bed 2, The soundproof cabin 3 is provided with a one-way sound transmission channel 4, which communicates the inside and the outside of the soundproof cabin 3, and a sound transmission direction switching device is arranged inside the channel.

Specifically, both the nuclear magnetic scanning device 1 and the sliding bed 2 are existing devices. By placing the soundproof cabin 3 on the sliding bed 2 to form a closed soundproof space, pregnant women only need to lie down in the soundproof cabin 3 during the examination. No need to wear any wearable device. The soundproof cabin 3 can isolate the noise generated by the nuclear magnetic scanning device 1 during the examination, so as to provide a quiet and comfortable examination environment for pregnant women. In order to avoid affecting the NMR inspection, both the one-way sound transmission channel 4 and the sound transmission direction switching device are made of non-magnetic materials.

The one-way sound transmission channel 4 can establish a one-way sound transmission channel inside and outside the soundproof cabin 3, the sound in the soundproof cabin 3 can be transmitted to the outside along the one-way sound transmission channel 4, and the noise from the outside cannot be transmitted into the soundproof cabin 3 Inside. In this way, the soundproof cabin 3 can be kept quiet, and the doctor can also hear the sound in the soundproof cabin 3 in real time through the existing communication device in the MRI examination room, so as to understand the situation of the subject.

The doctor can switch the sound transmission direction of the one-way sound transmission channel 4 by the sound transmission direction switching device, and switch the sound transmission direction from the inside of the original sound insulation cabin 3 to the outside of the sound insulation cabin 3, and switch from the outside of the sound insulation cabin 3 to the inside of the sound insulation cabin 3. In this way, the doctor's voice through the communication device can be transmitted into the soundproof cabin 3 .

In this embodiment, preferably, as shown in FIG. 3 , the sound transmission direction switching device includes an upper plane 6 and a lower plane 7 arranged in parallel, and the upper plane 6 and the lower plane 7 are each provided with a corresponding reflection device 8 And the metasurface device 9, the reflection device 8 is provided with a reflection slope 10 and a switching mechanism 11, the reflection surface of the reflection slope 10 faces the channel opening of the one-way sound transmission channel 4, and forms an angle of 135 degrees with the corresponding plane, the said The switching mechanism 11 is used to drive the reflective slope 10 to rotate, and switch the channel opening towards which the reflective slope 10 faces;

Described metasurface device 9 is provided with reflection plate 12 and driving mechanism 15, and the plate surface of this reflection plate is provided with 2 acoustic metasurfaces 13, and 2 acoustic metasurfaces 13 cooperate with 2 states of reflecting device 8 respectively , the driving mechanism 15 drives the reflecting plate 12 to switch the acoustic metasurface 13 that cooperates with the reflecting device 8 .

As shown in FIG. 5 , the one-way sound transmission channel 4 includes a passage opening a and a passage opening b, wherein the passage opening a communicates with the interior of the soundproof cabin 3 , and the passage opening b communicates with the outside. During inspection, the sound transmission direction of the one-way expressive channel 4 remains from channel port a to channel port b.

The sound of the subject enters from the channel opening a of the one-way sound transmission channel 4. When the sound propagates to the reflecting slope 10, the sound is reflected forward to the acoustic metasurface 13 of the corresponding metasurface device 9. The acoustic metasurface 13 has The function of abnormal reflection, so the forward incident sound wave completely passes through, while the reverse incident sound wave is completely reflected, so as to realize the one-way transmission of sound. Moreover, the one-way sound transmission channel 4 can circulate air and play a certain role in ventilation. The specific principle of sound one-way propagation has been disclosed in the patent "Broadband One-way Sound Transmission Channel" (publication number CN104795061A), and will not be repeated here.

When the doctor communicates with the subject, the reflective surface of the reflective slope 10 can be switched to the channel opening b by the switching mechanism 11, and the reflective plate 12 can be driven by the drive mechanism 15 to switch the acoustic metasurface matched with the reflective device 8 13. The direction of sound transmission is switched from channel port b to channel port a, so that the doctor's voice through the communication device can enter the soundproof cabin 3 .

In this embodiment, preferably, as shown in Figure 3, the switching mechanism 11 is provided with two linked telescopic rods 16, the fixed ends of the two telescopic rods 16 are fixed to the corresponding plane, and the other ends are respectively connected to the The upper end and the lower end of the reflecting plate 12 are hinged.

As shown in Figure 3, the upper plane 6 and the lower plane 7 are all provided with reflecting grooves 24, and the groove walls on both sides of the reflecting grooves 24 are provided with receiving grooves 25, and the reflecting plate 12 is accommodated in the receiving grooves 25, and is connected with the receiving grooves. The driving mechanism 15 is connected, the driving mechanism 12 is a hydraulic screw rod, and the hydraulic screw rod drives the reflecting plate 12 to extend into the reflecting groove 24 .

As shown in Figure 4, the two acoustic metasurfaces 13 are respectively the first acoustic metasurface 13a and the second acoustic metasurface 13b, and the first acoustic metasurface 13a and the second acoustic metasurface 13b are along the driving direction of the hydraulic screw. Set in turn. Wherein, the sound transmission direction corresponding to the first acoustic metasurface 13a is from channel opening a to channel opening b, and the sound transmission direction corresponding to the second acoustic metasurface 13b is from channel opening b to channel opening a.

As shown in FIG. 5 , when the sound transmission direction is from channel opening a to channel opening b, the driving mechanism 15 drives the reflecting plate 12 to extend out of the receiving groove 25 until the first acoustic metasurface 13 a fully extends into the reflecting groove 24 . In this way, the sound wave reflected by the reflective slope 10 can be transmitted from the channel opening b through the secondary reflection of the first acoustic metasurface 13 a.

As shown in Figure 6, when the sound transmission direction is from the passage b to the passage a, by exchanging the lengths of the two telescopic rods 16 and pushing the launch plate 12 to move through the hydraulic screw, the telescopic rod 16 can be Hydraulically actuated telescopic rod or pneumatically actuated telescopic rod. During the switching process, the two telescopic rods 16 need to maintain the same telescopic speed. Simultaneously, the driving mechanism 15 drives the reflecting plate 12 to continue stretching out of the receiving groove 25 until the second acoustic metasurface 13b stretches into the reflecting groove 24, and the first acoustic metasurface 13a stretches into the receiving groove 25 on the other side of the reflecting groove 24. . In this way, the sound wave entering the one-way sound transmission channel 4 from the channel opening b can be reflected by the reflecting slope 10 to the second acoustic metasurface 13b, and then can be transmitted from the channel opening a through the reflection of the second acoustic metasurface 13b.

In this embodiment, preferably, as shown in Figure 2, the soundproof cabin 3 is provided with a cabin bottom 20 and a cabin cover 21, one side of the cabin cover 21 is hinged with the cabin bottom 20, and the edge of the cabin cover 21 is set There are soundproof pads 22.

When the cabin cover 21 and the cabin bottom 20 are closed, the sound-insulating pad 22 can block the gap between the cabin cover 21 and the cabin bottom 20, thereby forming a completely closed sound-proof space, and pregnant women will not be affected by the outside world when lying in this sound-proof space. the effect of noise. And the canopy 21 can be a hollow structure, and the hollow position is a vacuum, which reduces the weight of the canopy 21 while improving the sound insulation effect, and facilitates opening the canopy 21.

In this embodiment, preferably, the canopy 21 is made of transparent sound-insulating material. Pregnant women can observe the external situation through the transparent cabin cover 21, which can prevent pregnant women from developing claustrophobia and improve the comfort of the detection system. And, the doctor can observe the situation of the pregnant woman in the soundproof cabin 3 by the camera that the existing MRI scanner is set.

In this embodiment, preferably, a physiological monitoring device is also provided, and the monitoring sensor of the physiological monitoring device is arranged in the soundproof cabin 3, and the bottom 20 of the soundproof cabin 3 has four wire holes 23, Four wire passing holes 23 are respectively distributed around the bottom of the tank 20, and the signal wires of the monitoring sensors pass through the wire passing holes 23 and are connected to the monitoring terminal of the physiological monitoring device after passing through the soundproof cabin 3.

The physiological monitoring device can be selected from existing NMR compatible monitors, such as TESLA Duo, Draeger TeslaM3, Schiller MAGlife and other NMR compatible monitors. When in use, fix the monitoring sensor on the corresponding position of the pregnant woman's body, and connect the signal connector of the monitoring sensor to the monitoring terminal in the MRI examination room. Doctors can learn about the physiological characteristics of pregnant women in real time through the monitoring terminal to ensure the safety of pregnant women. . Moreover, the signal lines of the detection coil of the nuclear magnetic resonance scanning device 1 can extend out of the soundproof cabin 3 along the four wire holes 23 to connect to the signal processing terminal of the nuclear magnetic resonance scanning device 1 .

Existing fetal magnetic resonance examinations require pregnant women to hold their breath many times for a long time, resulting in a decrease in the blood oxygen content of pregnant women, so the safety and comfort of pregnant women's examinations are not high. In this embodiment, preferably, an air conditioning device is also provided, the air conditioning device is provided with an exhaust device A and an oxygen concentration adjusting device B, the exhaust port of the exhaust device A, and the oxygen concentration adjusting device B The air supply ports are respectively connected to the soundproof cabin 3 through the ventilation hose C, and the oxygen concentration sensor of the oxygen concentration adjusting device B is arranged in the ventilation hose C between the soundproof cabin and the exhaust device A.

Specifically, the exhaust device A can exhaust the air in the soundproof cabin 3, such as an existing air extractor. Oxygen concentration regulating device B can adjust the oxygen concentration of the air in the soundproof cabin 3 according to the oxygen concentration detected by the oxygen concentration sensor, such as the existing patent "A kind of oxygen concentration regulating device" (Notice No. 208771224U), thereby increasing the blood pressure of pregnant women. Oxygen concentration, improving the safety and comfort of detection.

The front and rear ends of the soundproof cabin 3 are all provided with flexible pipe interfaces 17, and after the pregnant woman lies down into the soundproof cabin 3, the cabin cover 21 is closed. Then the two ventilation hoses C are respectively communicated with the hose interfaces 17 at the front and rear ends of the soundproof cabin 3, and are communicated with the exhaust device A and the oxygen concentration adjustment device B placed in the nuclear magnetic examination room.

Because the nuclear magnetic resonance radio frequency will cause the pregnant woman to generate heat, the air circulation in the soundproof cabin 3 can be formed through the oxygen concentration adjustment device B and the exhaust device A, and the heat generated by the pregnant woman can be taken out of the soundproof cabin 3 to keep the inside of the soundproof cabin 3 cool, so that Pregnant women are able to remain calm.

Because the invention has good sound insulation effect, high comfort and safety, the invention can also be used for examination of children under 8 years old, brain function research and the like. And the oxygen concentration regulating device B can also be switched to a gas anesthesia device, so as to carry out animal experiments.

Embodiment 2. Embodiment 2 is roughly the same as Embodiment 1. The main difference is that the sound transmission direction switching device is provided with two unidirectional sound transmission ducts 18, and the sound transmission directions of the two unidirectional sound transmission ducts 18 are opposite. , and arranged side by side in the one-way sound transmission channel 4, each one-way sound transmission pipeline 18 is provided with a soundproof door 19 at the pipe opening, and the two soundproof doors 19 are connected by an interlocking mechanism.

Specifically, the one-way sound transmission pipe 18 has the same structure as the existing one-way sound transmission channel 4, as in the above-mentioned patent "broadband one-way sound transmission channel", and the opening and closing states of the two soundproof doors 19 can be switched through the interlocking mechanism , so as to switch the one-way sound transmission pipe 18 communicated with the sound transmission channel. Since the sound transmission directions of the two one-way sound transmission pipes 18 are opposite, the purpose of switching the sound transmission direction can be realized. The interlocking mechanism and the existing interlocking The door mechanism is the same, and in order to avoid the influence of the strong magnetic field generated by the nuclear magnetic scanning equipment, the interlock mechanism can adopt the existing pneumatic interlock mechanism.

For example, a pneumatic rotary motor 5 is set between two one-way sound transmission ducts 18, the rotary shaft of the pneumatic rotary motor 5 is fixed to two soundproof doors 19, and the two soundproof doors 19 are symmetrical with respect to the center of the rotary shaft. The pneumatic rotary motor 5 drives the two soundproof doors 19 to rotate, thereby realizing interlocking of the soundproof doors 19 between the two and the one-way sound transmission duct 18.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those of ordinary skill in the art can make a variety of similar implementations under the inspiration of the present invention without violating the purpose and claims of the present invention. It means that such transformations all fall within the protection scope of the present invention.

Claims (11)

1. A nuclear magnetic resonance detection system provided with a nuclear magnetic scanning device and a sliding bed, characterized in that: the sliding bed is provided with a sound insulation cabin made of non-magnetic materials, the sound insulation cabin is provided with a unidirectional sound transmission channel, the unidirectional sound transmission channel is communicated with the inside and the outside of the sound insulation cabin, and a sound transmission direction switching device is arranged in the channel;

the sound transmission direction switching device comprises an upper plane and a lower plane which are arranged in parallel, wherein the upper plane and the lower plane are respectively provided with a corresponding reflecting device and a super-surface device, the reflecting device is provided with a reflecting inclined plane and a switching mechanism, the reflecting surface of the reflecting inclined plane faces towards the channel opening of the unidirectional sound transmission channel and forms an included angle of 135 degrees with the corresponding plane, and the switching mechanism is used for driving the reflecting inclined plane to rotate and switching the channel opening towards which the reflecting inclined plane faces;

the ultrasonic surface device is provided with a reflecting plate and a driving mechanism, 2 acoustic ultrasonic surfaces are arranged on the surface of the reflecting plate, the 2 acoustic ultrasonic surfaces respectively correspond to the 2 sound transmission directions of the unidirectional sound transmission channel, and the driving mechanism drives the reflecting plate to switch the 2 acoustic ultrasonic surfaces.

2. The nuclear magnetic resonance detection system of claim 1, wherein: the switching mechanism is provided with 2 telescopic links of linkage, and the stiff end and the plane that correspond of 2 telescopic links are fixed, and the other end respectively with the upper end and the lower extreme of reflecting plate are articulated.

3. The nuclear magnetic resonance detection system of claim 1, wherein: the sound insulation cabin is provided with a cabin bottom and a cabin cover, one side of the cabin cover is hinged with the cabin bottom, and the edge of the cabin cover is provided with a sound insulation pad.

4. A nuclear magnetic resonance detection system according to claim 3, wherein: the pod is made of a transparent sound insulating material.

5. The nuclear magnetic resonance detection system of claim 1, wherein: the monitoring sensor of the physiological monitoring device is arranged in the sound insulation cabin, the sound insulation cabin is provided with a wire through hole, and a signal wire of the monitoring sensor penetrates out of the sound insulation cabin along the wire through hole and is connected with a monitoring terminal signal of the physiological monitoring device.

6. The nuclear magnetic resonance detection system of claim 1, wherein: the air conditioning device is further provided with an exhaust device and an oxygen concentration adjusting device, an exhaust port of the exhaust device and an air supply port of the oxygen concentration adjusting device are respectively communicated with the sound insulation cabin through a ventilation hose, and an oxygen concentration sensor of the oxygen concentration adjusting device is arranged in the ventilation hose between the sound insulation cabin and the exhaust device.

7. A nuclear magnetic resonance detection system provided with a nuclear magnetic scanning device and a sliding bed, characterized in that: the sliding bed is provided with a sound insulation cabin made of non-magnetic materials, the sound insulation cabin is provided with a unidirectional sound transmission channel, the unidirectional sound transmission channel is communicated with the inside and the outside of the sound insulation cabin, and a sound transmission direction switching device is arranged in the channel;

the sound transmission direction switching device is provided with 2 unidirectional sound transmission pipelines, the sound transmission directions of the 2 unidirectional sound transmission pipelines are opposite, the two unidirectional sound transmission pipelines are arranged in the unidirectional sound transmission channels side by side, sound insulation doors are arranged at pipeline openings of each unidirectional sound transmission pipeline, and the 2 sound insulation doors are connected through an interlocking mechanism.

8. The nuclear magnetic resonance detection system of claim 7, wherein: the sound insulation cabin is provided with a cabin bottom and a cabin cover, one side of the cabin cover is hinged with the cabin bottom, and the edge of the cabin cover is provided with a sound insulation pad.

9. The nuclear magnetic resonance detection system of claim 8, wherein: the pod is made of a transparent sound insulating material.

10. The nuclear magnetic resonance detection system of claim 7, wherein: the monitoring sensor of the physiological monitoring device is arranged in the sound insulation cabin, the sound insulation cabin is provided with a wire through hole, and a signal wire of the monitoring sensor penetrates out of the sound insulation cabin along the wire through hole and is connected with a monitoring terminal signal of the physiological monitoring device.

11. The nuclear magnetic resonance detection system of claim 7, wherein: the air conditioning device is further provided with an exhaust device and an oxygen concentration adjusting device, an exhaust port of the exhaust device and an air supply port of the oxygen concentration adjusting device are respectively communicated with the sound insulation cabin through a ventilation hose, and an oxygen concentration sensor of the oxygen concentration adjusting device is arranged in the ventilation hose between the sound insulation cabin and the exhaust device.

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