Doppler ultrasonic diagnosis system for dysphagia detection

Abstract

The invention discloses a Doppler ultrasonic diagnosis system for dysphagia detection, and belongs to the technical field of Doppler ultrasonic diagnosis. The method comprises the following steps: respectively measuring the geniolingual muscle movement, swallowing time, tongue movement and the distance between the tongue bone and the thyroid cartilage of a stroke patient in a B-type ultrasonic mode and an M-type ultrasonic mode, recording test data after multiple swallowing tests, calculating to obtain an average value of the geniolingual muscle movement, the swallowing time, the tongue movement and the distance between the tongue bone and the thyroid cartilage, and calculating the average value of the geniolingual muscle movement, the swallowing time, the tongue movement and the distance between the tongue bone and the thyroid cartilage. Then the measurement results of the swallowing time and the distance between the tongue bone and the thyroid cartilage are used as evaluation and diagnosis bases for diagnosis, so that objective and accurate diagnosis bases are provided for the treatment and rehabilitation process of the swallowing dysfunction of a stroke patient, and nursing personnel can evaluate and diagnose the swallowing dysfunction after the stroke by using a simple B-ultrasonic instrument at the bedside; and the diagnosis accuracy of medical personnel is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of Doppler ultrasound diagnosis, and in particular relates to a Doppler ultrasound diagnosis system for detecting dysphagia. Background Art

[0002] Stroke is a clinically critical disease, and patients may suffer from swallowing disorders. Swallowing is a complex neuromuscular reflex coordinated movement that requires the coordinated movement of structures such as the tongue, hyoid bone, pharynx and esophagus. The movement of the hyoid bone and larynx is closely related to the swallowing phase. The forward movement of the hyoid bone occurs simultaneously with the upward movement of the larynx, which is crucial for protecting the airway and relaxing the cricopharyngeal muscle. Abnormalities can cause aspiration or even suffocation. The tongue is the basic skeletal muscle for chewing, manipulating, containing and transporting boluses to the root of the tongue during the oral phase of swallowing. Oropharyngeal dysphagia is a neurological disease. Common sequelae of swallowing disorders are related to reduced strength and endurance of the tongue, which can easily lead to lateral groove residue in the oral phase, poor push formation and chewing, as well as flap residue and aspiration in the pharyngeal phase. When diagnosing swallowing disorders, ultrasound equipment is used for auxiliary diagnosis. Among them, B-type ultrasound diagnostic equipment can form a series of brightness-modulated ultrasound cross-sectional images, and M-type ultrasound diagnostic equipment can intuitively display the movement of tissues in real time. Quantitative and qualitative parameters are evaluated through the acquisition and static analysis of tongue muscle ultrasound images and kinematic measurements of the hyoid bone, tongue, larynx, pharynx and esophagus.

[0003] When performing detection, the existing Doppler ultrasound diagnostic system uses a single B-type ultrasound diagnostic instrument or M-type ultrasound diagnostic instrument to convert the patient's swallowing movements into a series of ultrasound cross-sectional images or separate swallowing dynamic images. The ultrasound cross-sectional images and swallowing dynamic images are analyzed separately. It is difficult to match the ultrasound cross-sectional images with the swallowing dynamic image process, which can easily lead to deviations in the diagnosis of the patient's swallowing disorder. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the present invention provides a Doppler ultrasound diagnostic system for swallowing disorder detection, which solves the problem that the existing Doppler ultrasound diagnostic system, during detection, uses a single B-type ultrasound diagnostic instrument or M-type ultrasound diagnostic instrument to convert the patient's swallowing movements into a series of ultrasound cross-sectional images or separate swallowing dynamic images, and analyzes the ultrasound cross-sectional images and swallowing dynamic images separately, making it difficult to correspond the ultrasound cross-sectional images and the swallowing dynamic image process, which easily leads to deviations in the diagnosis of the patient's swallowing disorder.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a Doppler ultrasound diagnostic system for dysphagia detection, comprising a flat-panel all-digital color Doppler ultrasound diagnostic system, the model of which is wEye6, and the modes of which are divided into B-mode ultrasound mode and M-mode ultrasound mode; The subjects were instructed to sit upright and keep their heads in a neutral position during the examination. The ultrasound probe was evenly coated with coupling agent and placed at the target location. Appropriate pressure was applied to ensure a clear image without affecting swallowing. The subjects took 5 mL of 35-40°C warm water in their mouths and swallowed the water once after hearing the instruction. The swallowing process was recorded by ultrasound. Each ultrasound indicator was examined three times, with an interval of at least 30 seconds between each examination. The collected ultrasound indicators include: S1: Geniohyoid muscle movement measurement: geniohyoid muscle movement time, movement amplitude, and movement speed; S2: Swallowing time measurement: oral swallowing time, pharyngeal swallowing time; S3: Tongue movement measurement: the amplitude and velocity of the tongue movement curve during the rising phase, and the amplitude and velocity of the tongue movement curve during the falling phase; S4: measurement of the distance between the hyoid bone and the thyroid cartilage; The diagnosis is based on swallowing time measurement and the distance between the hyoid bone and thyroid cartilage.

[0006] As a further solution of the present invention: the configuration of the flat-panel all-digital color Doppler ultrasound diagnostic system includes a host, a convex array abdominal probe, a high-frequency linear array probe, an adapter, a battery, a power cord, and a coupling agent.

[0007] As a further solution of the present invention: the data collection steps for measuring the movement of the geniohyoid muscle are as follows: an ultrasound probe is placed in the middle of the subject's mandible, in front of the hyoid bone, with the probe parallel to the subject's midsagittal plane. First, in B-type ultrasound mode, the geniohyoid muscle can be seen as a strip-shaped low-echo image. Then, the ultrasound mode is switched to M-type ultrasound mode, and the sampling line is placed at the lowest point of the geniohyoid muscle depression. The movement image is recorded when the subject swallows, and the movement time, movement amplitude, and movement speed of the geniohyoid muscle during the swallowing process are measured, and the average value is calculated and recorded.

[0008] As a further solution of the present invention: the data collection steps for swallowing time measurement are: placing the ultrasound probe in the middle position between the subject's hyoid bone and thyroid cartilage, with the probe parallel to the subject's midsagittal plane, first in B-type ultrasound mode, it can be seen that the hyoid bone and thyroid cartilage on both sides of the image are highly echoic, switching to M-type ultrasound mode, and placing the sampling line 0.5 cm below the hyoid bone. When the subject swallows, the image shows a curve change, the motion image is recorded, the time from the start to the end of the curve change is measured, and the average value is calculated and recorded.

[0009] As a further solution of the present invention: the data collection steps for the tongue movement measurement are: placing the ultrasound probe in the middle of the subject's mandible, in front of the hyoid bone, with the probe parallel to the subject's median sagittal plane, first in B-type ultrasound mode, a raised high-echo bright line can be seen on the back of the tongue, switching to M-type ultrasound mode, the sampling line is placed at the highest point of the raised bright line, and the movement image is recorded when the subject swallows, and the rising time, amplitude and speed of the tongue movement curve, and the falling time, amplitude and speed of the tongue movement curve are measured, where the sum of the rising time and the falling time of the curve is the oral swallowing time, and the average value is calculated and recorded.

[0010] As a further solution of the present invention: the data evaluation of the tongue movement measurement is detected by a composite B / M ultrasound instrument, and the convex array probe is placed on the median coronal plane of the mandible. The B-mode ultrasound clearly displays the entire tongue, and the M-mode ultrasound sampling line is located in the center of the tongue. Since the M-mode ultrasound adds a slow scanning sawtooth wave to the brightness modulation type, the light spot is slowly scanned from left to right to draw a graph. Therefore, on the M-mode ultrasound image, with the slow scanning in the horizontal direction, the various layers of tongue tissue unfold into a curve. With the vertical axis as the scanning time line and the horizontal axis as the slow scanning time of the light spot, the position, depth and propagation time of the measured structure can be seen. On the M-mode ultrasound image, the tongue surface appears as a narrow line with strong echoes. During swallowing, the narrow line will change with the movement of the tongue and show a curved shape. The swallowing movement is evaluated using B+M-mode ultrasound, and the various parameters of the swallowing movement curve corresponding to the tongue surface on the M-mode ultrasound image are measured and analyzed. Tongue movement is divided into preparatory, ascending, stabilizing, and recovery phases, and the following measurements were made: ① Phase I of tongue movement, which is the time it takes for the tongue to push the food bolus after the subject begins swallowing food according to instructions, and is the time it takes for the tongue surface to drop to its lowest point as shown by the M-ultrasound; ② Phase II of tongue movement, which is the time it takes for the tongue to push and transport the food bolus to the pharynx; ③ Maximum amplitude of tongue movement, which is the distance the tongue is lifted; and ④ Maximum velocity of tongue movement, which is the slope of the maximum amplitude of tongue movement. Each swallowing task was performed three times, and the average value was taken. The swallowing interval between each task was 30 seconds.

[0011] As a further embodiment of the present invention, the data acquisition steps for measuring the distance between the hyoid bone and the thyroid cartilage are as follows: an ultrasound probe is placed on the left side of the subject's neck, between the hyoid bone and the thyroid cartilage, with the probe parallel to the subject's sagittal plane. In B-mode ultrasound mode, the hyoid bone and thyroid cartilage on both sides of the image are visible as high-echo images. A dynamic video of the movement is recorded while the subject swallows. Later, frame-by-frame observation is performed to find the images with the maximum and minimum distances between the hyoid bone and the thyroid cartilage, respectively. MHTD and NHTD are measured, HTDS and DSR are calculated, and the average values ​​are recorded.

[0012] As a further solution of the present invention: the data evaluation steps for measuring the distance between the hyoid bone and the thyroid cartilage are as follows: the ultrasound probe is placed on the larynx parallel to the midsagittal position, and the display can show a longitudinal section from the root of the thyroid tongue to the thyroid cartilage. The section can be seen that the hyoid bone and the thyroid cartilage are strong echoes with a thick acoustic shadow behind them, and the distance between the two is HLA.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, by switching the working mode of the flat-panel all-digital color Doppler ultrasound diagnostic system, the geniohyoid muscle movement, swallowing time, tongue movement and the distance between the hyoid bone and the thyroid cartilage of the stroke patient are measured in the B-mode ultrasound mode and the M-mode ultrasound mode respectively. After multiple swallowing tests, the test data are recorded, and the average values ​​of the geniohyoid muscle movement, swallowing time, tongue movement and the distance between the hyoid bone and the thyroid cartilage are calculated. The measurement results of the swallowing time and the distance between the hyoid bone and the thyroid cartilage are then used as the basis for evaluation and diagnosis. This provides an objective and accurate diagnostic basis for the treatment and rehabilitation of swallowing dysfunction in stroke patients, enables nursing staff to use a simple B-ultrasound instrument at the bedside to evaluate and diagnose swallowing dysfunction after stroke, and improves the accuracy of diagnosis by medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a principle block diagram of the system of the present invention; Figure 2 B-mode and M-mode ultrasound images of geniohyoid muscle movement; Figure 3 B-mode and M-mode ultrasound images of swallowing time during the pharyngeal phase; Figure 4 This is the B-mode ultrasound image of tongue movement; Figure 5 This is the M-mode ultrasound image of tongue movement; Figure 6 Schematic diagram of tongue movement during swallowing tasks under B-mode or M-mode ultrasound; Figure 7 Schematic diagram of the measurement of the distance between the hyoid bone and the thyroid cartilage in the resting and swallowing states; DETAILED DESCRIPTION

[0015] The technical solution of the present application will be further described in detail below in conjunction with specific implementation methods.

[0016] like Figure 1-7 As shown, the present invention provides a technical solution: a Doppler ultrasound diagnostic system for swallowing disorder detection, including a flat-panel all-digital color Doppler ultrasound diagnostic system, the model of the flat-panel all-digital color Doppler ultrasound diagnostic system is wEye6, and the modes of the flat-panel all-digital color Doppler ultrasound diagnostic system are divided into B-mode ultrasound mode and M-mode ultrasound mode; The subjects were instructed to sit upright and keep their heads in a neutral position during the examination. The ultrasound probe was evenly coated with coupling agent and placed at the target location. Appropriate pressure was applied to ensure a clear image without affecting swallowing. The subjects took 5 mL of 35-40°C warm water in their mouths and swallowed the water once after hearing the instruction. The swallowing process was recorded by ultrasound. Each ultrasound indicator was examined three times, with an interval of at least 30 seconds between each examination. Ultrasound parameters collected include: S1: Geniohyoid muscle movement measurement: geniohyoid muscle movement time, movement amplitude, and movement speed; S2: Swallowing time measurement: oral swallowing time, pharyngeal swallowing time; S3: Tongue movement measurement: the amplitude and velocity of the tongue movement curve during the rising phase, and the amplitude and velocity of the tongue movement curve during the falling phase; S4: measurement of the distance between the hyoid bone and the thyroid cartilage; The diagnosis is based on swallowing time measurement and the distance between the hyoid bone and thyroid cartilage.

[0017] The configuration of the flat-panel all-digital color Doppler ultrasound diagnostic system includes a host, a convex array abdominal probe, a high-frequency linear array probe, an adapter, a battery, a power cord, and a coupling agent.

[0018] The data collection steps for geniohyoid muscle movement measurement are as follows: place the ultrasound probe in the middle of the subject's mandible, in front of the hyoid bone, with the probe parallel to the subject's midsagittal plane. First, in B-mode ultrasound mode, the geniohyoid muscle can be seen as a strip-shaped low-echo image. Switch to M-mode ultrasound mode, place the sampling line at the lowest point of the geniohyoid muscle depression, record the movement image when the subject swallows, measure the movement time, movement amplitude, and movement speed of the geniohyoid muscle during the swallowing process, calculate the average value, and record it.

[0019] The data collection steps for swallowing time measurement are as follows: place the ultrasound probe in the middle position between the subject's hyoid bone and thyroid cartilage, with the probe parallel to the subject's midsagittal plane. First, in B-mode ultrasound mode, the hyoid bone and thyroid cartilage on both sides of the image are visible as high echoes. Switch to M-mode ultrasound mode, and place the sampling line 0.5 cm below the hyoid bone. When the subject swallows, the image shows a curve change. Record the motion image, measure the time from the start to the end of the curve change, calculate the average value and record it.

[0020] The data collection steps for tongue movement measurement are as follows: place the ultrasound probe in the middle of the subject's mandible, in front of the hyoid bone, with the probe parallel to the subject's midsagittal plane. First, in B-mode ultrasound mode, a raised high-echo bright line can be seen on the back of the tongue. Switch to M-mode ultrasound mode, place the sampling line at the highest point of the raised bright line, record the movement image when the subject swallows, measure the time, amplitude and speed of the rising phase of the tongue movement curve, and the time, amplitude and speed of the falling phase of the tongue movement curve. The sum of the rising phase time and the falling phase time of the curve is the oral swallowing time, and calculate the average value and record it.

[0021] The data evaluation of tongue movement measurement is performed using a composite B / M ultrasound instrument. The convex array probe is placed on the median coronal plane of the mandible. B-mode ultrasound clearly displays the entire tongue, and the M-mode ultrasound sampling line is located in the center of the tongue. Since M-mode ultrasound adds a slow-scanning sawtooth wave to the brightness modulation type, the light spot slowly scans from left to right to draw a graph. Therefore, on the M-mode ultrasound image, with the slow horizontal scanning, the various layers of tongue tissue unfold into a curve. With the vertical axis as the scanning timeline and the horizontal axis as the light spot slow scanning time, the position, depth, and ultrasound propagation time of the measured structure can be seen. On the M-mode ultrasound image, the tongue surface appears as a narrow line with strong echoes. During swallowing, this narrow line changes with the movement of the tongue and exhibits a curved shape. B+M-mode ultrasound is used to evaluate swallowing movement, and various parameters of the swallowing movement curve corresponding to the tongue surface on the M-mode ultrasound image are measured and analyzed. Tongue movement is divided into preparatory, ascending, stabilizing, and recovery phases, and the following measurements were made: ① Phase I of tongue movement, which is the time it takes for the tongue to push the food bolus after the subject begins swallowing food according to instructions, and is the time it takes for the tongue surface to drop to its lowest point as shown by the M-ultrasound; ② Phase II of tongue movement, which is the time it takes for the tongue to push and transport the food bolus to the pharynx; ③ Maximum amplitude of tongue movement, which is the distance the tongue is lifted; and ④ Maximum velocity of tongue movement, which is the slope of the maximum amplitude of tongue movement. Each swallowing task was performed three times, and the average value was taken. The swallowing interval between each task was 30 seconds.

[0022] The data collection steps for measuring the distance between the hyoid bone and thyroid cartilage are as follows: place the ultrasound probe on the left side of the subject's neck, between the hyoid bone and thyroid cartilage, with the probe parallel to the subject's sagittal plane. In B-mode ultrasound mode, the hyoid bone and thyroid cartilage on both sides of the image are visible as hyperechoic images. Record dynamic video of the movement while the subject swallows. Later, observe frame by frame to find the images with the maximum and minimum distances between the hyoid bone and thyroid cartilage, measure MHTD and NHTD, calculate HTDS and DSR, and record the average value.

[0023] The data evaluation steps for measuring the distance between the hyoid bone and thyroid cartilage are as follows: the ultrasound probe is placed in the larynx parallel to the midsagittal plane, and the monitor can show a longitudinal section from the base of the thyroid tongue to the thyroid cartilage. This section shows that the hyoid bone and thyroid cartilage appear as a strong echo with a thick acoustic shadow behind them. The distance between the two is the HLA.

[0024] The working principle of the present invention is: After having the patient sit upright in the designated position, the patient's head should always be kept in a vertical neutral position during the examination without shaking at will. After evenly applying coupling agent on the surface of the ultrasound probe, the ultrasound probe should be placed tightly against the patient's designated testing position. According to the testing needs, the flat-panel all-digital color Doppler ultrasound diagnostic system should switch between B-mode ultrasound mode and M-mode ultrasound mode. The patient should hold a certain amount of warm water in his mouth, listen to the instructions of the medical staff, and swallow. The movement time, movement amplitude, movement speed, swallowing time of the geniohyoid muscle, the amplitude and speed of the tongue movement curve during the rising period, the amplitude and speed of the tongue movement curve during the falling period, and the distance between the hyoid bone and the thyroid cartilage during the swallowing action should be recorded. The swallowing data should be recorded multiple times, and the average value of each set of data should be calculated to provide reference data for medical staff to evaluate the patient's swallowing function.

[0025] Finally, a few points should be explained: Although the present invention has been described in detail above with general descriptions and specific embodiments, on the basis of the present invention, the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the present invention.

Claims

1. A Doppler ultrasound diagnostic system for dysphagia detection, comprising a flat-panel all-digital color Doppler ultrasound diagnostic system, characterized by: The model of the flat-panel all-digital color Doppler ultrasound diagnostic system is wEye6, and the modes of the flat-panel all-digital color Doppler ultrasound diagnostic system are divided into B-mode ultrasound mode and M-mode ultrasound mode; The subjects were instructed to sit upright and keep their heads in a neutral position during the examination. The ultrasound probe was evenly coated with coupling agent and placed at the target location. Appropriate pressure was applied to ensure a clear image without affecting swallowing. The subjects took 5 mL of 35-40°C warm water in their mouths and swallowed the water once after hearing the instruction. The swallowing process was recorded by ultrasound. Each ultrasound indicator was examined three times, with an interval of at least 30 seconds between each examination. The collected ultrasound indicators include: S1: Geniohyoid muscle movement measurement: geniohyoid muscle movement time, movement amplitude, and movement speed; S2: Swallowing time measurement: oral swallowing time, pharyngeal swallowing time; S3: Tongue movement measurement: the amplitude and velocity of the tongue movement curve during the rising phase, and the amplitude and velocity of the tongue movement curve during the falling phase; S4: measurement of the distance between the hyoid bone and the thyroid cartilage; The diagnosis is based on swallowing time measurement and the distance between the hyoid bone and thyroid cartilage.

2. The Doppler ultrasound diagnostic system for swallowing disorders according to claim 1, characterized in that: The configuration of the flat-panel all-digital color Doppler ultrasound diagnostic system includes a host, a convex array abdominal probe, a high-frequency linear array probe, an adapter, a battery, a power cord, and a coupling agent.

3. The Doppler ultrasound diagnostic system for swallowing disorders according to claim 1, characterized in that: The data collection steps for the geniohyoid muscle movement measurement are as follows: an ultrasound probe is placed in the middle of the subject's mandible, in front of the hyoid bone, with the probe parallel to the subject's midsagittal plane. First, in B-mode ultrasound mode, a strip-shaped low-echo image of the geniohyoid muscle can be seen. Then, the ultrasound mode is switched to M-mode ultrasound mode, and the sampling line is placed at the lowest point of the geniohyoid muscle depression. The movement image is recorded when the subject swallows, and the movement time, movement amplitude, and movement speed of the geniohyoid muscle during the swallowing process are measured. The average value is calculated and recorded.

4. The Doppler ultrasound diagnostic system for swallowing disorders according to claim 1, characterized in that: The data collection steps for swallowing time measurement are as follows: placing an ultrasound probe in the middle position between the subject's hyoid bone and thyroid cartilage, with the probe parallel to the subject's midsagittal plane, first in B-mode ultrasound mode, where the hyoid bone and thyroid cartilage on both sides of the image are hyperechoic, switching to M-mode ultrasound mode, and placing the sampling line 0.5 cm below the hyoid bone. When the subject swallows, the image shows a curve change, the motion image is recorded, the time from the start to the end of the curve change is measured, and the average value is calculated and recorded.

5. The Doppler ultrasound diagnostic system for swallowing disorders according to claim 1, characterized in that: The data collection steps for the tongue movement measurement are as follows: an ultrasound probe is placed in the middle of the subject's mandible, in front of the hyoid bone, with the probe parallel to the subject's midsagittal plane. First, in B-mode ultrasound mode, a raised high-echo bright line can be seen on the back of the tongue. Switch to M-mode ultrasound mode, place the sampling line at the highest point of the raised bright line, record the movement image when the subject swallows, measure the time, amplitude and speed of the rising phase of the tongue movement curve, and the time, amplitude and speed of the falling phase of the tongue movement curve, where the sum of the rising phase and the falling phase of the curve is the oral swallowing time, and calculate the average value and record it.

6. The Doppler ultrasound diagnostic system for swallowing disorders according to claim 5, characterized in that: The data evaluation of the tongue movement measurement is performed using a composite B / M ultrasound instrument. The convex array probe is placed on the median coronal plane of the mandible. The B-mode ultrasound clearly displays the entire tongue, and the M-mode ultrasound sampling line is located in the center of the tongue. Since the M-mode ultrasound adds a slow-scanning sawtooth wave to the brightness modulation type, the light spot is slowly scanned from left to right to draw a graph. Therefore, on the M-mode ultrasound image, with the slow scanning in the horizontal direction, the various layers of tongue tissue unfold into a curve. With the vertical axis as the scanning time line and the horizontal axis as the slow scanning time of the light spot, the position, depth and propagation time of the measured structure can be seen. On the M-mode ultrasound image, the tongue surface appears as a narrow line with strong echoes. During swallowing, the narrow line changes with the movement of the tongue and exhibits a curved shape. The swallowing movement is evaluated using B+M-mode ultrasound, and the various parameters of the swallowing movement curve corresponding to the tongue surface on the M-mode ultrasound image are measured and analyzed. Tongue movement is divided into preparatory, ascending, stabilizing, and recovery phases, and the following measurements were made: ① Phase I of tongue movement, which is the time it takes for the tongue to push the food bolus after the subject begins swallowing food according to instructions, and is the time it takes for the tongue surface to drop to its lowest point as shown by the M-ultrasound; ② Phase II of tongue movement, which is the time it takes for the tongue to push and transport the food bolus to the pharynx; ③ Maximum amplitude of tongue movement, which is the distance the tongue is lifted; and ④ Maximum velocity of tongue movement, which is the slope of the maximum amplitude of tongue movement. Each swallowing task was performed three times, and the average value was taken. The swallowing interval between each task was 30 seconds.

7. The Doppler ultrasound diagnostic system for swallowing disorders according to claim 1, characterized in that: The data collection steps for measuring the distance between the hyoid bone and the thyroid cartilage are as follows: placing an ultrasound probe on the left side of the subject's neck, between the hyoid bone and the thyroid cartilage, with the probe parallel to the subject's sagittal plane; in B-mode ultrasound mode, the hyoid bone and thyroid cartilage on both sides of the image are visible as high-echo images; recording a dynamic video of the movement while the subject swallows; and subsequently observing frame by frame to find the images with the maximum and minimum distances between the hyoid bone and the thyroid cartilage, respectively; measuring MHTD and NHTD; calculating HTDS and DSR; and recording the average values.

8. The Doppler ultrasound diagnostic system for swallowing disorders according to claim 7, characterized in that: The data evaluation steps for measuring the distance between the hyoid bone and the thyroid cartilage are as follows: the ultrasound probe is placed on the larynx parallel to the midsagittal position, and the display can show a longitudinal section from the root of the thyroid tongue to the thyroid cartilage. This section shows that the hyoid bone and the thyroid cartilage are strong echoes with a thick acoustic shadow behind them, and the distance between the two is HLA.

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