CN108742680B - Medical imaging device - Google Patents

Abstract

The present application relates to medical imaging equipment. A medical imaging equipment includes: a carrying device, used to carry a subject; a sensor, used to detect the respiratory signal of the subject; a processor, connected in communication with the sensor, for judging the respiratory state of the subject according to the respiratory signal; a scanning imaging device, used for scanning and imaging the subject on the carrying device; wherein, the processor is also connected in communication with the scanning imaging device, and used to control the scanning imaging operation of the scanning imaging device according to the breathing state. The above-mentioned medical imaging equipment is equipped with a sensor to detect the respiratory signal of the subject, and judges the respiratory state of the subject according to the detected respiratory signal, thereby controlling the scanning and imaging operation of the subject, which can reduce invalid scanning caused by the respiratory movement of the subject and the unnecessary radiation dose received by the subject.

Description

medical imaging equipment

technical field

The invention relates to the field of medical devices, in particular to a medical imaging device.

Background technique

When using medical imaging equipment such as CT to scan and image patients, the patient bed carries the subject into the scanning area. Generally, the subject needs to hold his breath to perform effective scanning and imaging. If the subject forgets to hold his breath or cannot control his breath and performs breathing movements during the scanning process, the quality of the scanning and imaging will be affected, and even the scanning and imaging cannot meet the diagnostic requirements.

Traditional medical imaging equipment generally prompts the subject to hold his breath by voice, then starts scanning, and then reminds the subject to resume breathing by voice after the scan is completed. However, in the actual operation process, if the subject does not hear the voice prompt to hold his breath in time, or cannot control his breathing during the scanning process, the quality of the scanning image will still be affected, which may lead to invalid scanning and the subject may receive unnecessary radiation doses.

Contents of the invention

Based on this, it is necessary to address the above technical problems and provide a medical imaging device that can detect the breathing state of the subject to control the scanning and imaging operation of the subject, thereby reducing unnecessary radiation doses to the subject due to invalid scans caused by respiratory movement.

A medical imaging device, comprising:

a carrying device for carrying the subject;

a sensor for detecting the breathing signal of the subject;

a processor, connected in communication with the sensor, for judging the breathing state of the subject according to the breathing signal;

a scanning imaging device, configured to scan and image the subject on the carrying device;

Wherein, the processor is also connected in communication with the scanning imaging device, and is used for controlling the scanning imaging operation of the scanning imaging device according to the respiratory state.

The above-mentioned medical imaging equipment is equipped with a sensor to detect the respiratory signal of the subject, and judges the respiratory state of the subject according to the detected respiratory signal, thereby controlling the scanning and imaging operation of the subject, which can reduce invalid scanning caused by the respiratory movement of the subject and the unnecessary radiation dose received by the subject.

In one of the embodiments, the medical imaging equipment also includes:

a display, connected in communication with the processor, and used for displaying relevant information of the subject's respiratory state.

In one of the embodiments, the sensor is a pressure sensor, which is used to detect the change of the pressure exerted by the subject on the carrying device in real time, so as to obtain the breathing signal of the subject.

In one of the embodiments, the number of the pressure sensor is one, and the pressure sensor is arranged at the geometric center of the carrying device;

Wherein, the pressure sensor acquires the breathing signal of the subject by detecting the change of the pressure value exerted by the subject on the carrying device.

In one of the embodiments, the number of the pressure sensors is multiple, and the multiple pressure sensors are arranged in the pressure area on the carrying device;

Wherein, the multiple pressure sensors acquire the breathing signal of the subject by detecting the pressure distribution state and pressure value changes exerted by the subject on the bearing device.

In one embodiment, the sensor is a non-contact sensor, which is used for real-time detection of the subject's chest ups and downs, so as to obtain the subject's breathing signal.

In one embodiment, during the process of scanning and imaging the subject by the scanning imaging device, the non-contact sensor and the subject remain in a relatively static state.

In one of the embodiments, the breathing state includes a breath-holding state and a normal breathing state, and the processor includes:

a processing unit, connected in communication with the sensor, and processing the received breathing signal to generate the breathing state signal;

A control unit, connected in communication with the processing unit and the scanning imaging device, is used to control the scanning imaging operation of the scanning imaging device on the subject according to the respiratory state signal generated by the processing unit;

Wherein, when the breathing state is a breath-holding state, the control unit is used to control the scanning and imaging device to be in the state of performing scanning and imaging operations; and

When the breathing state is a normal breathing state, the control unit controls the scanning and imaging device to be in a state of stopping scanning and imaging operations.

In one of the embodiments, the processor also includes:

a judging unit that is respectively connected in communication with the processing unit and the control unit;

Wherein, the scanning imaging operation is stopped due to the subject's breathing, and when the judging unit obtains that the subject resumes the breath-holding state, the judging unit makes the control unit control the scanning imaging device to continue or restart the scanning imaging operation.

In one embodiment, the scanning imaging device is at least one of a computed tomography device, a magnetic resonance imaging device, a positron emission tomography device, and a radiotherapy device.

Description of drawings

Fig. 1 is a schematic structural diagram of a medical imaging device in an embodiment;

Fig. 2 is a specific structural schematic diagram of medical imaging equipment in an embodiment

FIG. 3 is a schematic diagram of a partial structure of a medical imaging device in an embodiment;

Fig. 4 is a partial structural schematic diagram of a medical imaging device in another embodiment;

Fig. 5 is a schematic structural diagram of a medical imaging device in another embodiment;

FIG. 6 is a schematic structural diagram of a processor in an embodiment;

Fig. 7 is a schematic structural diagram of a processor in another embodiment.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

FIG. 1 is a schematic structural diagram of a medical imaging device in an embodiment. As shown in FIG. 1 , a medical imaging device 100 includes a carrying device 120 , a sensor 140 , a scanning imaging device 160 and a processor 180 . The processor 180 communicates with the sensor 140 and the scanning imaging device 160 respectively, wherein the supporting device 120 is used to carry the subject, the sensor 140 is used to detect the respiratory signal of the subject, and the scanning imaging device 160 is used to scan and image the subject on the supporting device 120, and the processor 180 is used to judge the respiratory state of the subject according to the respiratory signal detected by the sensor 140, so as to control the scanning imaging device 160 to perform scanning and imaging operations on the subject according to the breathing state of the subject.

Specifically, the above-mentioned carrying device 120 can generally be composed of a carrying plate, a supporting part, and a moving mechanism. The carrying plate is arranged on the supporting part, and the moving mechanism can drive the carrying plate to move on the supporting part. When performing scanning and imaging operations on the subject, the subject is fixed on the carrying plate, and the moving mechanism drives the carrying plate to move, so that the subject moves into the scanning and imaging area. After entering the scanning imaging area, the sensor 140 detects the respiration signal of the subject and outputs the respiration signal to the processor 180, and the processor 180 controls the scanning and imaging operation of the subject by the scanning imaging device 160 according to the respiration signal.

Further, the scanning imaging device 160 may include at least one of a computerized tomography (CT for short) device, an X-ray imaging device, a Magnetic Resonance (MR) device, a positron emission tomography (PET for short) and radiotherapy device. During the scanning and imaging process of the subject by the imaging device 160, if the subject produces respiratory movement, it may cause motion artifacts and affect the imaging quality. If the imaging quality cannot meet the requirements, it is necessary to re-scan and image to make the patient receive unnecessary radiation dose. The subject's body will move or change correspondingly when breathing, and the signal of these changes can be detected by the sensor 140 as a breathing signal, so as to judge the breathing state of the subject. For example, the pressure value and distribution of pressure exerted on the carrying device by the subject will change when breathing, so the sensor 140 may be a pressure sensor to detect the pressure exerted by the subject on the carrying device. The sensor 140 can also be other types of sensors, as long as it can detect the change signal caused by the subject's breathing.

After the sensor 140 detects the respiratory signal of the subject, the processor 180 judges the respiratory state of the subject according to the respiratory signal. If the subject is in a breath-holding state, the processor 180 controls the scanning imaging device 160 to perform scanning and imaging operations on the subject. If the subject is in a normal breathing state, the processor 180 controls the scanning imaging device 160 to stop the imaging operation of scanning the subject, thereby reducing the unnecessary radiation dose received by the patient. Wherein, the processor 180 can communicate with the sensor 140 and the scanning and imaging device 160 in a wired or wireless manner, and the processor 180 can be set inside the housing of the carrying device 120 or the scanning and imaging device 160 , or can be set independently at other locations.

The above-mentioned medical imaging equipment is equipped with a sensor to detect the respiratory signal of the subject, and judges the respiratory state of the subject according to the detected respiratory signal, thereby controlling the scanning and imaging operation of the subject, which can reduce invalid scanning caused by the respiratory movement of the subject and the unnecessary radiation dose received by the subject.

In one embodiment, the above-mentioned medical imaging device further includes a display, which is in communication connection with the above-mentioned processor, and is used for displaying relevant information of the subject's respiratory state.

Specifically, a display may also be provided in the medical imaging device, and the display is connected to the processor in a wired or wireless manner to display the breathing state of the subject and related information of scanning and imaging. The monitor receives the breathing state of the subject judged by the processor, and displays the breathing state to the doctor or operator. The monitor can also display the subject's information, physiological parameters, and current scanning imaging status and progress and other related information, so that the lifelong or operator can understand the condition of the subject more clearly.

FIG. 2 is a schematic structural diagram of a medical imaging device in an embodiment. As shown in FIG. 2, in an embodiment, a medical imaging device 200 may include a carrying device 220, a sensor 240, a scanning imaging device 260, and a processor (not marked in the figure).

The carrying device 220 includes a carrying plate 222, a supporting part 224 and a moving mechanism 226. The carrying device 220 is used to carry the subject. The carrying plate 222 is arranged on the supporting part 224. The moving mechanism 226 can drive the carrying plate 222 to move on the supporting part 224, so that the subject enters the scanning imaging area of the scanning imaging device 260. The above-mentioned sensor 240 is a pressure sensor, which is fixedly installed in the area where the carrying plate 222 is used to carry the subject. The pressure sensor is used to detect the change of the pressure exerted by the subject on the carrying device in real time, so as to obtain the breathing signal of the subject. The above-mentioned processor is respectively connected to the sensor 240 and the scanning imaging device 260 in a wired or wireless manner, and the processor may be set inside the scanning imaging device 260 or independently in other positions.

Specifically, when the human body breathes, the pressure exerted by the human body on the bearing plate 222 will periodically change with the respiratory movement, so the sensor 240 can be a pressure sensor, which can obtain the breathing signal of the subject by detecting the change of the pressure exerted by the subject on the bearing plate 222. The pressure sensor is fixedly arranged in the area where the carrying plate 222 is used to carry the subject, detects the pressure exerted by the subject on the carrying plate 222 in real time, and outputs the pressure change exerted by the subject on the carrying plate 222 to the processor as a breathing signal. The processor receives the breathing signal output by the pressure sensor to determine the breathing state of the examinee, so as to control the scan imaging operation of the scanning imaging device 260 on the examinee according to the breathing state of the examinee.

Further, a threshold is preset in the processor, and this threshold is the maximum value of the pressure change on the bearing plate 222 when the human body holds its breath, and this threshold can be obtained through multiple experiments or theoretical calculation. In actual scanning imaging, if the pressure change detected by the pressure sensor is less than the above threshold, the processor determines that the subject is holding his breath, and then controls the scanning imaging device 260 to be in the state of performing scanning and imaging operations on the subject;

FIG. 3 is a schematic diagram of a partial structure of a medical imaging device for measuring breathing state in one embodiment. In one embodiment, as shown in FIG. 3 , based on the structure shown in FIG. 2 and related technical content, the sensor in this embodiment includes a pressure sensor 242. The pressure sensor 242 is arranged at the geometric center of the bearing plate 222. The pressure sensor 242 detects the change of the pressure value applied by the subject on the bearing plate 222 to obtain the breathing signal of the subject.

Specifically, a pressure sensor 242 is arranged on the bearing plate 222, and the pressure sensor 242 is arranged at the geometric center of the bearing plate 222. When the subject breathes, the change of the pressure value at the geometric center of the bearing plate 222 is the most obvious and the easiest to detect. Therefore, the pressure sensor 242 is arranged at this position. The pressure sensor 242 detects the change of the pressure value exerted by the subject on the bearing plate 222 as a breathing signal, and outputs the breathing signal to the processor.

Fig. 4 is a partial structural diagram of a medical imaging device in another embodiment. In one embodiment, as shown in Fig. 4 , based on the structure shown in Fig. 2 and related technical content, the sensor in this embodiment includes a plurality of pressure sensors 244. The plurality of pressure sensors 244 are arranged in the pressure area of the carrier plate 222. The plurality of pressure sensors 244 detect the pressure distribution state and pressure value changes applied by the subject on the carrier plate 222 to obtain the breathing signal of the subject.

Specifically, in order to obtain a more accurate detection effect, the number of pressure sensors provided on the carrying plate 222 may be multiple, for example, nine are provided in this embodiment, and the nine pressure sensors 244 are uniformly arranged on the carrying plate 222 in the pressure area that is in contact with the subject. The pressure sensor 244 can not only detect the change of the pressure value exerted by the subject on the bearing plate 222 , but also detect the change of the distribution state of the pressure exerted by the subject on the bearing plate 222 , so as to make the detection more accurate and stable.

Further, it can be understood that the number and arrangement of the plurality of pressure sensors 244 can be determined according to actual needs. The more pressure sensors 244, the denser the arrangement, the more accurate the detection result. The pressure sensors 244 can be densely arranged in the pressure area of the bearing plate 222 at the position corresponding to the torso of the subject, and can also fully cover the bearing plate 222, so that the detection result is not easily affected by factors such as the height and body shape of the subject.

FIG. 5 is a schematic structural diagram of a medical imaging device in another embodiment. As shown in FIG. 5, in one embodiment, a medical imaging device 500 may include a carrying device 520, a sensor 540, a scanning imaging device 560, and a processor (not marked in the figure). The sensor 540 is a non-contact sensor, which is used for real-time detection of the amplitude of the subject's chest ups and downs, so as to obtain the subject's breathing signal.

Specifically, when the human body breathes, in addition to the pressure applied to the carrying device will change, the human body's chest will also periodically fluctuate with breathing. Therefore, the sensor can be a non-contact sensor. The non-contact sensor is set at a position where the subject's chest can be detected. If the threshold is above, the processor judges that the subject is in a breath-holding state, and controls the scanning and imaging device 560 to be in a state of performing scanning and imaging operations on the subject; if the undulating motion detected by the non-contact sensor is greater than the above threshold, the processor determines that the subject is in a normal breathing state, and then controls the scanning and imaging device 560 to be in a state of stopping scanning and imaging operations on the subject. It can be understood that the above sensor 540 may also be a CCD image sensor and other sensors that can detect the rise and fall of the subject's chest. The above-mentioned processor is respectively connected to the sensor 540 and the scanning imaging device 560 in a wired or wireless manner, and the processor may be set inside the scanning imaging device 560 or independently in other positions.

Further, in one embodiment, during the process of scanning and imaging the subject by the scanning imaging device, the non-contact sensor 540 and the subject remain in a relatively static state.

Specifically, if there is relative movement between the subject and the sensor during detection, the difficulty in identifying chest heaving movement will increase, which may lead to inaccurate detection results of respiratory signals. Therefore, the non-contact sensor should be in a relatively static state with the subject. Since the carrying device 520 will carry the subject and move into the scanning imaging area, the non-contact sensor 540 can be arranged on the carrying plate of the carrying device 520 or on a component that can move with the carrying plate.

FIG. 6 is a schematic structural diagram of a processor in an embodiment. In an embodiment, as shown in FIG. 6 , the processor 180 includes a processing unit 182 and a control unit 184 . The above-mentioned processing unit 182 is connected in communication with the sensor, and is used for processing the received respiratory signal to generate a respiratory state signal. The above-mentioned control unit 184 is respectively connected to the processing unit 182 and the scanning imaging device, and is used to control the scanning imaging operation of the scanning imaging device on the subject according to the respiratory state signal generated by the processing unit;

Wherein, the breathing state includes a breath-holding state and a normal breathing state; when the breathing state is a breath-holding state, the control unit 184 controls the scanning imaging device to be in a state of performing scanning and imaging operations on the subject; when the breathing state is a normal breathing state, the control unit 184 controls the scanning imaging device to be in a state of stopping scanning and imaging operations on the subject.

Specifically, the processing unit 182 receives the respiration signal detected by the sensor, which is a change signal caused by the respiration movement of the subject, for example, it may be the change of the pressure exerted by the subject on the carrying device detected by the pressure sensor, or the undulating motion amplitude of the subject's chest detected by the non-contact sensor. A threshold is preset in the processing unit 182, and the threshold is the maximum value of the change signal measured by the corresponding sensor when the human body holds the breath. When the received respiratory signal is less than the threshold, the processing unit 182 generates the subject's respiratory state signal as a breath-holding state, and outputs the respiratory state signal to the control unit 184. After the control unit 184 receives the respiratory state signal, it controls the scanning and imaging device to be in the state of performing scanning and imaging operations on the subject; After receiving the state signal, control the scanning and imaging device to be in the state of stopping the scanning and imaging operation of the subject.

FIG. 7 is a schematic structural diagram of a processor in another embodiment. In one embodiment, as shown in FIG. 7 , based on the structure shown in FIG. 6 and related technical content, the processor 180 of this embodiment may further include a judging unit 186 . The judging unit 186 is connected in communication with the processing unit 182 and the control unit 184 respectively. During the scanning and imaging operation of the subject by the scanning imaging device, the scanning and imaging operation stops due to the breathing of the subject. The judging unit 186 obtains the progress of the current scanning and imaging operation, thereby judging whether the scanning and imaging operation needs to be continued.

Specifically, if during the scanning and imaging operation, the subject performs a breathing operation due to uncontrollable reasons, the processing unit 182 determines that the subject is in a normal breathing state, and the control unit 184 controls the scanning and imaging device to stop the scanning and imaging operation of the subject. When the subject returns to the breath-holding state, if the scanning and imaging operation needs to be continued, the judging unit 186 controls the scanning and imaging device to continue the interrupted scanning and imaging operation after obtaining the breathing state from the processing unit 182;

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered as within the scope of this specification.

The above-mentioned embodiments only represent several implementation modes of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the scope of the patent for the invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims (7)

1. A medical imaging device, comprising:

a carrying device for carrying a subject;

the sensor is a non-contact sensor and is used for detecting the fluctuation movement amplitude of the chest of the testee in real time so as to acquire the respiratory signal of the testee; the sensor comprises a CCD image sensor;

the processor is in communication connection with the sensor and is used for judging the breathing state of the testee according to the breathing signal;

a scanning imaging device for scanning imaging the subject on the carrying device;

the processor is also in communication connection with the scanning imaging device and is used for controlling the scanning imaging operation of the scanning imaging device according to the breathing state; the respiratory states include a breath hold state and a normal respiratory state, the processor comprising:

a processing unit in communication with the sensor for processing the received respiratory signal to generate the respiratory status signal; the processing unit stores a threshold value which is the maximum value of the chest fluctuation movement amplitude in the breath-holding state of the human body; if the amplitude of the undulating motion of the subject's chest is less than the threshold, the processing unit determines that the subject is in a breath-hold state; if the amplitude of the fluctuation motion of the chest of the subject is greater than the threshold value, the processing unit determines that the subject is in a normal breathing state;

the control unit is respectively connected with the processing unit and the scanning imaging device in a communication way and is used for controlling the scanning imaging operation of the scanning imaging device on the detected person according to the breathing state signal generated by the processing unit; when the breathing state is a breath hold state, the control unit is used for controlling the scanning imaging device to be in a state of scanning imaging operation; and when the breathing state is a normal breathing state, the control unit is used for controlling the scanning imaging device to be in a state of stopping scanning imaging operation;

the processor further includes:

the judging unit is respectively connected with the processing unit and the control unit in a communication way; wherein, the scan imaging operation is stopped due to the respiration of the subject, and when the judging unit acquires that the subject resumes the breath hold state, if the scan imaging operation needs to be continued, the judging unit causes the control unit to control the scan imaging device to continue the interrupted scan imaging operation; if the scanning imaging operation does not need to be continued, the judging unit causes the control unit to control the scanning imaging device to restart the scanning imaging operation.

2. The medical imaging device of claim 1, further comprising:

and the display is in communication connection with the processor and is used for displaying the related information of the breathing state of the subject.

3. The medical imaging device of claim 1, wherein the processor is disposed inside a housing of the carrier or the scanning imaging device.

4. The medical imaging apparatus of claim 1, wherein the non-contact sensor remains relatively stationary with the subject during scanning imaging of the subject by the scanning imaging device.

5. The medical imaging device of claim 1, wherein the processor is communicatively coupled to the sensor and the scanning imaging means, respectively, by wired or wireless means.

6. The medical imaging device of claim 1, wherein the processing unit is configured to store a baseline threshold value and generate a breath hold status signal if the received respiration signal is less than the baseline threshold value; the reference threshold is the maximum value of the change signal measured by the sensor when the human body holds breath.

7. The medical imaging apparatus of any of claims 1 to 6, wherein the scanning imaging device comprises at least one of a computed tomography device, a magnetic resonance imaging device, a positron emission tomography device, and a radiotherapy device.