阅读说明：本技术 一种无液氦核磁共振仪 (Liquid-free helium nuclear magnetic resonance instrument ) 是由 贝嘉仪 莫磊 王苏聪 梁平 李璟 于 2020-05-20 设计创作，主要内容包括：本发明涉及一种无液氦核磁共振仪的检测方法,所述方法包括如下步骤：获取检测类型,所述检测类型对应有表示检测时椅床倾斜角度的椅床位置状态；判断检测类型对应的椅床位置状态是否为水平卧位状态；若否,则获取待测人员是否存在不可受压部位；若存在,则获取不可受压部位位于椅床上的位置；判断不可受压部位位于椅床上的位置是否位于松紧带的初始位置；若是,则控制椅床上的松紧带移动至远离不可受压部位的位置捆绑人体。当椅床需要倾斜并且待测人员有不可受压部位时,松紧带可避开不可受压部位将人体固定在椅床上。(The invention relates to a detection method of a liquid-free helium nuclear magnetic resonance instrument, which comprises the following steps: acquiring a detection type, wherein the detection type corresponds to a chair bed position state representing the inclination angle of the chair bed during detection; judging whether the position state of the chair bed corresponding to the detection type is a horizontal lying position state or not; if not, acquiring whether the person to be tested has an incompressible part; if the non-compressible part exists, the position of the non-compressible part on the chair bed is obtained; judging whether the position of the non-compressible part on the chair bed is at the initial position of the elastic band; if so, the elastic band on the chair bed is controlled to move to a position far away from the non-compressible part to bind the human body. When the chair bed needs to be inclined and the person to be measured has the non-compressible part, the elastic band can avoid the non-compressible part to fix the human body on the chair bed.)

1. A detection method of a liquid-free helium nuclear magnetic resonance instrument is characterized by comprising the following steps:

acquiring a detection type, wherein the detection type corresponds to the position state of the chair bed (2) indicating the inclination angle of the chair bed (2) during detection;

judging whether the position state of the chair bed (2) corresponding to the detection type is a horizontal lying position state or not;

if not, acquiring whether the person to be tested has an incompressible part;

if the pressure-bearing part exists, the position of the non-pressure-bearing part on the chair bed (2) is obtained;

judging whether the position of the non-compressible part on the chair bed (2) is at the initial position of the elastic band (9);

if yes, the elastic band (9) on the chair bed (2) is controlled to move to a position far away from the non-compressible part to bind the human body.

2. The method for detecting the fluidless helium nuclear magnetic resonance spectrometer as claimed in claim 1, wherein the method for acquiring the position of the non-compressible portion on the chair bed (2) is specifically: the method comprises the steps of obtaining positions of two ends of a person to be tested in the height direction on a chair bed (2), calculating the height of the person to be tested according to the distance between the two ends of the person to be tested in the height direction, judging the position of an incompressible part in the height direction of a human body according to an empirical value, and obtaining the position of the incompressible part on the chair bed (2).

3. The detection method of the fluidless helium nuclear magnetic resonance spectrometer according to claim 1, wherein after the elastic band (9) binds the human body, the scanning device is rotated to the position state of the chair bed (2) corresponding to the detection type according to the position state of the chair bed (2) corresponding to the detection type.

4. The detection method of the fluidless helium nuclear magnetic resonance spectrometer according to claim 1, wherein the elastic band (9) is controlled to be tightened to a predetermined tension value when the elastic band (9) binds the human body.

5. The method for detecting the fluidless helium nuclear magnetic resonance spectrometer as claimed in claim 1, wherein after the scanning by the scanning device whose chair bed (2) position is not in the horizontal lying position is completed, the scanning device is controlled to rotate to the horizontal lying position, and the elastic band (9) is released.

6. A liquid-free helium nuclear magnetic resonance apparatus comprises a detection device (1) and a chair bed (2), and is characterized by comprising:

the detection type acquisition module is used for acquiring a detection type, and the detection type corresponds to the position state of the chair bed (2) indicating the inclination angle of the chair bed (2) during detection;

the chair bed (2) position state judging module is used for judging whether the chair bed (2) position state corresponding to the detection type is a horizontal lying state or not;

the non-compressible part acquisition module is used for acquiring whether a person to be detected has a non-compressible part;

the non-compressible part position acquisition module is used for acquiring the position of the non-compressible part on the chair bed (2);

the non-compressible part position judging module is used for judging whether the position of the non-compressible part on the chair bed (2) is positioned at the initial position of the elastic band (9);

the elastic band (9) control module is used for controlling the elastic band (9) on the chair bed (2) to move to a position far away from the non-compressible part to bind the human body.

7. The fluidless helium nuclear magnetic resonance spectrometer according to claim 6, wherein a plurality of optical sensors (3) are arranged in the length direction of the chair bed (2), the optical sensors (3) are connected with the incompressible position detection module, the height detection module acquires the positions of both ends of the person to be measured on the chair bed (2) in the height direction according to the signal returned when the optical sensors (3) are blocked, calculates the height of the person to be measured according to the distance between both ends of the person to be measured in the height direction, judges the position of the incompressible part in the height direction of the human body according to the empirical value, and acquires the position of the incompressible part on the chair bed (2).

8. The fluidless helium nuclear magnetic resonance spectrometer according to claim 6, wherein sliding grooves (4) are formed in both sides of the length direction of the chair bed (2) along the length direction of the chair bed (2), the sliding grooves (4) are connected with sliding blocks (5) in a sliding manner, pulleys (6) for driving the sliding blocks (5) to move on the sliding grooves (4) are arranged on the sliding blocks (5), an elastic band (9) is connected between the two sliding blocks (5), one end of the elastic band (9) is fixedly connected with the sliding blocks (5), and the other end of the elastic band is connected with a rotating shaft of a rotating motor (7) arranged on the sliding blocks (5).

9. The fluidless helium nuclear magnetic resonance spectrometer according to claim 8, comprising a rotation module (8) for rotating the scanning device to the position state of the chair bed (2) corresponding to the detection type according to the position state of the chair bed (2) corresponding to the detection type after the elastic band (9) is bound to the human body.

10. The fluidless helium nuclear magnetic resonance spectrometer according to claim 8, comprising a tension control module for controlling the rotation motor (7) to tighten the elastic band (9) to a predetermined tension value when the elastic band (9) is bound to the human body.

Technical Field

The invention relates to the technical field of magnetic resonance, in particular to a liquid-free helium nuclear magnetic resonance instrument.

Background

Magnetic Resonance Imaging (MRI) is currently an important tool for modern radiographic diagnosis. To maintain the superconducting state of the magnet, it is cooled to 4K with liquid helium. Helium resources in nature are very low, more than 80% of the global liquid helium supply comes from the United states, the global liquid helium price is continuously increased in a surge mode, and the cost of the liquid helium becomes a large burden of an MRI system. With the development of the refrigerator technology, the superconducting magnet technology also goes through a series of stages such as 10K (small volatile magnet) -4K (zero volatile magnet) -low liquid helium (philips operating technology, Freelium) -no liquid helium (no liquid helium superconducting magnet of high si). Various clinical magnetic resonance imaging devices currently available from various manufacturers, including GE, Siemens, Philips, and Toshiba, provide magnets that are "zero-volatile" in their name. However, even the most efficient "zero-volatility" MRI superconducting magnets still lose liquid helium, requiring periodic replenishment.

The parts of the lower limbs of the spine and the like are main pressure-bearing organs of a human body, and MRI images of the parts are obviously different in a standing or sitting posture and a lying posture, but the traditional liquid helium MRI can only image in the lying posture, so that the application of the MRI in researching bones and joints under a stress pressure-bearing state is limited. The liquid helium-free superconducting magnet can freely move and rotate, is matched with an innovative examination chair bed, can research the stressed pressure-bearing imaging of multiple postures and multiple organs, and has great clinical application value.

Based on the application that the liquid-helium-free superconducting magnet can freely move and rotate, when the examination chair bed rotates to be inclined or vertical to the ground, the examination chair bed cannot keep stable on the chair bed due to the physical conditions of part of people. When the human body part is injured, the human body is fixed on the chair bed by the elastic bands, and the injured part of the human body can be injured secondarily, so that different binding modes are needed for different people, and the injured human body can not be injured secondarily.

Disclosure of Invention

The invention aims to provide a detection method of a liquid-free helium nuclear magnetic resonance instrument, which has the characteristic that a person to be detected can be fixed under the condition that a detection device is inclined and the person to be detected has an injured part.

The above object of the present invention is achieved by the following technical solutions:

a detection method of a liquid-free helium nuclear magnetic resonance instrument comprises the following steps: acquiring a detection type, wherein the detection type corresponds to a chair bed position state representing the inclination angle of the chair bed during detection; judging whether the position state of the chair bed corresponding to the detection type is a horizontal lying position state or not; if not, acquiring whether the person to be tested has an incompressible part; if the non-compressible part exists, the position of the non-compressible part on the chair bed is obtained; judging whether the position of the non-compressible part on the chair bed is at the initial position of the elastic band; if so, the elastic band on the chair bed is controlled to move to a position far away from the non-compressible part to bind the human body.

By adopting the technical scheme, when the chair bed needs to be inclined and the person to be measured has the part which can not be pressed, the elastic band can avoid the part which can not be pressed to fix the human body on the chair bed.

The present invention in a preferred example may be further configured to: the method for acquiring the position of the non-compressible part on the chair bed comprises the following steps: the method comprises the steps of obtaining positions of two ends of a person to be tested in the height direction on a chair bed, calculating the height of the person to be tested according to the distance between the two ends of the person to be tested in the height direction, judging the position of an incompressible part in the height direction of a human body according to an empirical value, and obtaining the position of the incompressible part on the chair bed.

By adopting the technical scheme, the height of the person to be tested is obtained under the condition that the non-compressible part is known, the position of the non-compressible part in the height of the person can be judged according to the experience value, the position of the non-compressible part on the chair bed can be obtained according to the position of the person to be tested on the chair bed, and the elastic band can be used for avoiding the position to bind the person on the chair bed.

The present invention in a preferred example may be further configured to: after the elastic band is used for binding the human body, the scanning device is rotated to the chair bed position state corresponding to the detection type according to the chair bed position state corresponding to the detection type.

The present invention in a preferred example may be further configured to: when the elastic band binds the human body, the elastic band is controlled to be tightened to a preset tension value.

By adopting the technical scheme, the widths of different positions of a human body are different, and the tightening stroke of the tightening belt needs to be correspondingly changed, so that the elastic belt has a proper tightness for the restraint of the elastic belt on people, and the tightness is controlled by adopting a mode of fixing a tension value.

The present invention in a preferred example may be further configured to: and after the scanning device in the chair bed position state which is not in the horizontal lying position finishes scanning, controlling the scanner to rotate to the horizontal lying position state, and loosening the elastic band.

Through adopting above-mentioned technical scheme, loosen the taut area after the chair bed resumes the level, guarantee the personnel's safety that awaits measuring.

The invention also aims to provide a liquid-free helium nuclear magnetic resonance instrument system which has the characteristic that the personnel to be detected can be still fixed under the condition that the detection device is inclined and the personnel to be detected has injured parts.

The second aim of the invention is realized by the following technical scheme:

the utility model provides a no liquid helium nuclear magnetic resonance appearance system, includes detection device, chair bed and encircles the conveyer belt that chair bed length direction set up, includes: the detection type acquisition module is used for acquiring a detection type, and the detection type corresponds to a chair bed position state representing the inclination angle of the chair bed during detection; the chair bed position state judging module is used for judging whether the chair bed position state corresponding to the detection type is a horizontal lying position state or not; the non-compressible part acquisition module is used for acquiring whether a person to be detected has a non-compressible part; the non-compressible part position acquisition module is used for acquiring the position of the non-compressible part on the chair bed; the non-compressible part position judging module is used for judging whether the position of the non-compressible part on the chair bed is positioned at the initial position of the elastic band; and the elastic band control module is used for controlling the elastic band on the chair bed to move to a position far away from the non-compressible part to bind the human body.

The present invention in a preferred example may be further configured to: the length direction of the chair bed is lined up with a plurality of optical sensors, the optical sensors are connected with the non-pressure position detection module, the height detection module acquires the positions of two ends of the height direction of the person to be detected on the chair bed according to optical signals sensed by the optical sensors, the height of the person to be detected is calculated according to the distance between the two ends of the height direction of the person to be detected, the non-pressure position is judged in the height direction of the human body according to the experience value, and the position of the non-pressure position on the chair bed is obtained.

The present invention in a preferred example may be further configured to: the utility model discloses a chair bed, including chair bed length direction, spout, slide block, drive, slide belt, slide block and other end connection block are provided with the slide groove.

The present invention in a preferred example may be further configured to: the device comprises a rotating module, which is used for rotating the scanning device to the chair bed position state corresponding to the detection type according to the chair bed position state corresponding to the detection type after the elastic band is bound on the human body.

The present invention in a preferred example may be further configured to: the tension control module is used for controlling the rotating motor to tighten the elastic band to a preset tension value when the elastic band is used for binding a human body.

In summary, the invention includes at least one of the following beneficial technical effects:

when the chair bed needs to be inclined and the person to be tested has the part which can not be pressed, the elastic band can avoid the part which can not be pressed to fix the human body on the chair bed, so that the safety of the injured or disabled person in the detection process is ensured to avoid the injury.

Drawings

FIG. 1 is a flow chart of a method of the present invention;

FIG. 2 is a schematic mechanical diagram of the system of the present invention;

fig. 3 is a schematic view of the structure of the elastic band of the present invention in cooperation with a chair bed.

In the figure, 1, a detection device; 2. a chair bed; 3. a light sensor; 4. a chute; 5. a slider; 6. a pulley; 7. rotating the motor; 8. a rotation module; 9. and (4) elastic bands.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

The embodiment of the invention provides a detection method of a liquid-free helium nuclear magnetic resonance instrument, which comprises the following steps as shown in figure 1:

and acquiring a detection type corresponding to the position state of the chair bed 2 indicating the inclination angle of the chair bed 2 during detection.

In the embodiment of the present invention, the detection types may specifically include the following:

in the aspect of a musculoskeletal system, the physiological curvature of cervical, thoracic and lumbar vertebrae and the change of liquid-free helium MR imaging of an intervertebral disc, a vertebral canal and an intervertebral foramen at different horizontal angles are researched, the change of joint gaps, the slippage of joints and the gradual thickening of ligaments are accurately displayed, the real states of the physiological and pathological states of the thoracic and lumbar vertebrae are objectively reflected, the biological stress comparison is carried out with a normal vertebral body, the change conditions of bone stress after different operation modes are analyzed, the operation treatment is carried out according to the optimal fixing mode evaluated by a preoperative computer simulation and a finite element analysis technology, and the imaging basis for more reliable diagnosis and treatment of spinal diseases is provided.

In the aspect of nervous system, aiming at the clinical characteristics that the blood pressure of a patient with orthostatic hypotension is obviously reduced when the patient is raised from a lying position, the changes of the microstructures and the positions of the tonsils of the superior saddle pool, the anterior bridge pool, the midbrain, the pons and the cerebellum in the horizontal lying position and the natural standing state are explored, the non-liquid helium MRI imaging performance of the subdural effusion, the hypophysis enlargement and the cerebral venous sinus enlargement is analyzed, and the image-evidence-based medical evidence of the clinical symptoms of orthostatic hypotension is searched.

In the aspect of cardiovascular systems, a clinical pulmonary hypertension patient and a healthy volunteer are selected as research objects, cardiac great vessel non-liquid helium MRI anatomical images under different horizontal angles are obtained, the ratio of the main internal diameter of the pulmonary artery/the internal diameter of the chest of the right diaphragmatic apical plane and the ratio of the anterior wall thickness of the right ventricle/the internal diameter of the chest of the right diaphragmatic apical plane are analyzed, the ratio is compared with a right heart catheter detection index, and whether the anatomical index of the non-liquid helium MRI under different body position states can be used for judging and quantitatively analyzing the pulmonary hypertension is discussed.

In the aspect of a respiratory system, selecting patients with obstructive sleep apnea hypopnea syndrome to carry out liquid helium-free dynamic MR imaging on the midsagittal position of an upper airway in the horizontal lying position and the natural standing state respectively, guiding the midsagittal position imaging in 2 states into a computer, measuring the form change, the front and back swing angle and the length of the soft palate, statistically analyzing the value and the angle difference of each diameter line in the horizontal lying position and the natural standing state, and discussing the motion conditions of the soft palate and the reasons for causing obstruction in the horizontal lying position and the natural standing state of the patients with obstructive sleep apnea hypopnea syndrome.

In the aspect of a digestive system, bringing a patient meeting Roman III functional constipation diagnosis standards, selecting a semi-reclining position, injecting 300ml of corn paste containing a gadolinium pentaacetic acid glucosamine injection into a rectum, using an abdominal phased array coil, applying a fast perturbation gradient echo sequence, acquiring sagittal position images of a pelvic floor structure of the patient during rest, anus lifting and defecation, and evaluating by combining rectal anus pressure measurement, gastrointestinal transmission tests and X-ray defecation radiography results to explore the application value of dynamic liquid-free helium MRI defecation radiography in chronic constipation. The rotation angle of the frame of the MRI defecation radiography and the multi-mode imaging registration.

Therefore, different detection types need to control the chair bed 2 and the detection device 1 to be at different inclination angles, the inclination angles mainly include a horizontal state, a semi-lying state and a standing state, wherein the semi-lying state generally controls the chair bed 2 and the detection device 1 to rotate to an angle of 45 degrees with the horizontal plane, and the standing state generally controls the chair bed 2 and the detection device 1 to rotate to an angle of 90 degrees with the horizontal plane.

And judging whether the position state of the chair bed 2 corresponding to the detection type is a horizontal lying position state.

If not, acquiring whether the person to be tested has the non-compressible part.

In the embodiment of the present invention, if the position state of the chair bed 2 is the horizontal lying state, the human body does not need to be bound, and if the position state of the chair bed 2 is not the horizontal lying state, the human body slides due to the inclined chair bed 2, and the human body needs to be bound, and at this time, whether the incompressible part exists in the person to be measured needs to be acquired.

If the pressure-bearing part exists, the position of the non-pressure-bearing part on the chair bed 2 is obtained;

judging whether the position of the non-compressible part on the chair bed 2 is at the initial position of the elastic band 9;

if yes, the elastic band 9 on the chair bed 2 is controlled to move to a position far away from the non-compressible part to bind the human body.

In the embodiment of the present invention, the method for acquiring the position of the incompressible part on the chair bed 2 specifically includes: the method comprises the steps of obtaining the positions of two ends of a person to be measured in the height direction on a chair bed 2, calculating the height of the person to be measured according to the distance between the two ends of the person to be measured in the height direction, judging the position of the non-compressible part in the height direction of a human body according to an empirical value, and obtaining the position of the non-compressible part on the chair bed 2. For example, if the shoulder of the person to be measured is injured, the elastic bands 9 need to be bound around the shoulder to bind the person to be measured, and after the approximate height of the person to be measured is detected, the position of the shoulder on the chair bed 2 can be detected according to the experience value of the position of the shoulder on the body, so that the position of the shoulder on the chair bed 2 can be measured. The position of the elastic band 9 moving away from the non-compressible portion can be realized by a predetermined corresponding position. If the shoulders and hands are injured and can not be pressed, the binding part can be preset to bind the waist.

In the embodiment of the invention, after the elastic band 9 is used for binding the human body, the scanning device is rotated to the position state of the chair bed 2 corresponding to the detection type according to the position state of the chair bed 2 corresponding to the detection type. Then the elastic band 9 is controlled to avoid the part which can not be pressed to bind the human body, and when the elastic band 9 binds the human body, the elastic band 9 is controlled to be tightened to the preset tension value. Because the widths of different positions of a human body are different, the tightening stroke of the tightening belt needs to be correspondingly changed, so that the elastic belt 9 has proper tightness for the restraint of the human body, and the tightness is controlled by adopting a mode of fixing a tension value. And when the scanning device in the chair bed 2 position state which is not in the horizontal lying position state finishes scanning, controlling the scanner to rotate to the horizontal lying position state, and loosening the elastic band 9.

The invention also provides a liquid-free helium nuclear magnetic resonance instrument, as shown in fig. 2, comprising a detection device 1 and a chair bed 2, and further comprising:

the detection type acquisition module is used for acquiring a detection type, and the detection type corresponds to the position state of the chair bed 2 indicating the inclination angle of the chair bed 2 during detection;

the chair bed 2 position state judging module is used for judging whether the chair bed 2 position state corresponding to the detection type is a horizontal lying position state;

the non-compressible part acquisition module is used for acquiring whether a person to be detected has a non-compressible part;

an incompressible part position acquiring module for acquiring the position of the incompressible part on the chair bed 2;

the non-compressible part position judging module is used for judging whether the position of the non-compressible part on the chair bed 2 is positioned at the initial position of the elastic band 9;

the elastic band 9 control module is used for controlling the elastic band 9 on the chair bed 2 to move to a position far away from the non-compressible part to bind the human body.

The inclination of the detection device 1 and the chair bed 2 is realized through the rotation module 8, and the rotation module 8 rotates the scanning device to the position state of the chair bed 2 corresponding to the detection type according to the position state of the chair bed 2 corresponding to the detection type after the elastic band 9 binds the human body. The specific rotating module 8 is shown in fig. 3 and includes a motor and a gear set.

The detection mode of the position of the non-compressible part on the chair bed 2 is realized by the structure shown in figure 2, a plurality of light sensors 3 are arranged in the length direction of the chair bed 2, when a person lies on the chair bed 2, the light sensors 3 on the chair bed 2 are covered, the photosensitive signals output by the covered light sensors 3 are different from the photosensitive signals output by the uncovered light sensors 3, and therefore, the height of the person and the positions of the two ends of the person on the chair bed 2 can be measured according to the signals output by the covered light sensors 3. In the embodiment of the invention, the optical sensor 3 is connected with the incompressible position detecting module, the height detecting module acquires the positions of two ends of the person to be detected on the chair bed 2 in the height direction according to a signal returned when the optical sensor 3 is shielded, calculates the height of the person to be detected according to the distance between the two ends of the person to be detected in the height direction, judges the position of the incompressible part in the height direction of the human body according to an empirical value, and acquires the position of the incompressible part on the chair bed 2.

The moving mode of elastic cord 9 specifically realizes through the structure as shown in fig. 3, and 2 length direction's of chair bed both sides are equipped with spout 4 along 2 length direction of chair bed, 4 sliding connection of spout have slider 5, be equipped with the drive on the slider 5 the pulley 6 that slider 5 moved on spout 4, two be connected with elastic cord 9 between the slider 5, the axis of rotation of the rotation motor 7 that sets up on elastic cord 9 one end and 5 fixed connection of slider, the other end link block 5. The driving of the pulley 6 can be achieved by means of a motor. After receiving the sliding signal of the elastic band 9, the pulleys 6 of the two sliding blocks 5 move synchronously through respective motors. The elastic band 9 of the embodiment of the invention has certain rigidity and is in an arched state when in a loose state, so that the user can lie in the arched elastic band 9. The elastic band 9 is wound on the rotating shaft of the rotating motor 7, so that the elastic band 9 is tightened.

In the embodiment of the present invention, the photosensor 3 may be provided in the longitudinal direction of the chute 4, and the initial position of the elastic band 9 may be determined based on the same principle as the photosensor 3 provided in the chair bed 2.

In the embodiment of the present invention, the non-compressible region refers not only to the injured region of the human body but also to the head, the foot, and the like which are not suitable for binding.

The system also comprises a tension control module which is used for controlling the rotating motor 7 to tighten the elastic band 9 to a preset tension value when the elastic band 9 binds a human body.