58 results about "Breath holds" patented technology

The invention provides a CT guided liver puncture training method and system based on virtual reality, and relates to the technical field of virtual reality. A deformable liver model and a virtual CT reconstruction engine under respiration driving are constructed, needle body posture mapping and image fusion display are achieved by fusing an inertia-electromagnetic dual-mode sensor, path interaction control, tissue dynamic response and score feedback are supported, the scene difficulty is automatically adjusted based on a training result, and the accuracy and the reliability of the system are improved. Progressive puncture skill training of static breath-holding, shallow breath and free breath scenes is achieved, the sense of reality of training, operation feedback and teaching efficiency are improved, and the system is suitable for development and clinical teaching application of an interventional therapy training system under the guidance of medical images.

The pelvic floor muscle self-adaptive rehabilitation training system comprises a data acquisition unit, a data processing unit, a type identification unit, a degree evaluation unit and a training adjustment unit, and is used for acquiring rectus abdominis data, gluteus maximus data, respiratory rate data and the like of a user in a pelvic floor muscle rehabilitation training process as compensation identification data; then, the type recognition unit can process the compensation recognition data to obtain unconscious compensation types of the user in pelvic floor muscle rehabilitation training, the compensation types comprise abdominal muscle compensation, hip compensation and suffocation compensation, and meanwhile, the degree evaluation unit can evaluate the severity of the compensation types, so that the degree of the pelvic floor muscle rehabilitation training is improved. Finally, the training adjusting unit can generate a multi-modal strategy according to different compensation types and different severity degrees, the multi-modal strategy is used for guiding pelvic floor muscle rehabilitation training of the user, intervention on compensation is achieved, it is guaranteed that the user conducts complete rehabilitation training on pelvic floor muscles, invalid training and even injury are avoided, and the rehabilitation effect is enhanced.

The invention provides a magnetic resonance free respiration data extraction method based on a respiratory wave extraction algorithm, and relates to the technical field of respiration acquisition, and the method comprises the following steps: obtaining a rapid imaging sequence, and extracting a complex number sampling value of a center k space line of the rapid imaging sequence in a z direction as an initial input signal; performing z-direction IFFT interpolation processing on the initial input signal to output a high-resolution z-t signal matrix; performing time dimension signal smoothing processing on the high-resolution z-t signal matrix; performing normalization processing on the z-axis signal at each time point based on a smoothing processing result; the z-axis signals of all the channels are spliced along the longitudinal axis according to the normalization processing result to form a unified matrix; the unified matrix is subjected to standard PCA decomposition, and principal components of the unified matrix are extracted to obtain respiratory wave data; according to the method, the breathing signal waveform can be stably extracted from the MRI original k space in the free breathing state without depending on the breath holding condition, and the structure consistency and time synchronism of breathing waves are improved.

The invention belongs to the technical field of medical monitoring, and provides an inhalation treatment monitoring method and system based on the Internet of Things, and the method comprises the steps: collecting the inhalation flow value and the breath-holding time length of a single treatment behavior of a patient through an intelligent flow speed monitoring device in a jet atomizer, generating an inhalation and breath-holding time sequence, and carrying out the collection of the inhalation flow value and the breath-holding time length; calculating a pseudo-compliance evaluation value to judge whether pseudo-compliance exists or not, if so, analyzing the relevance between the pseudo-compliance evaluation value and the pseudo-compliance evaluation value through a distance correlation coefficient, during relevance, constructing an influence capture model by using an attention mechanism-residual network model, outputting an influence coefficient, and performing positive and negative coordination analysis; according to the method, the mist amount and the flow speed are adjusted based on the standard range and the influence coefficient, accurate evaluation of false compliance is achieved, effectiveness and controllability of inhalation treatment are improved through correlation analysis and parameter linkage optimization, the method is suitable for inhalation treatment equipment such as a jet atomizer, and improvement of treatment compliance and clinical curative effect of a patient is facilitated.

The application provides a radiotherapy breathing control threshold adaptive adjustment method based on image feedback, which comprises the following steps: before any fraction treatment, guiding a patient to perform deep inhalation breath holding, and acquiring chest three-dimensional image data of the patient through an image acquisition device; determining whether a breathing control threshold optimization condition is met based on the chest three-dimensional image data; when the breathing control threshold optimization condition is met, optimizing the breathing control threshold, and determining a new breathing control threshold for triggering radiotherapy beam output. The application uses the real lung volume calculated by three-dimensional image as a feedback variable to adaptively correct the control threshold based on inhaled gas volume in the traditional ABC system, so as to establish a closed-loop breathing control mechanism based on internal anatomical state.

To enhance reliability of breath-holding failure determination.SOLUTION: A kymographic apparatus comprises: a waveform acquisition part that acquires a lung field signal waveform regarding a lung field and a periodic signal waveform synchronous with a heartbeat from a dynamic image acquired in radiation kymography based on photographing conditions including breath-holding instructions; and a determination part that determines the occurrence of a breath-holding failure during the radiation kymography, on the basis of the result of comparison between the acquired lung field signal waveform and the acquired periodic signal waveform.SELECTED DRAWING: Figure 5

The present application relates to the field of intelligent medical care, and specifically to a method, device, and program product for evaluating pulmonary circulation time based on contrast agent-enhanced EIT. The method comprises S1, obtaining contrast agent-enhanced pulmonary EIT data of a test subject; S2, determining the pulmonary circulation start time and pulmonary perfusion end time based on the contrast agent-enhanced pulmonary EIT data; the pulmonary circulation start time is the moment when the electrical impedance signal of the contrast agent injected changes while the test subject holds his breath, and the pulmonary perfusion end time is the moment when the electrical impedance signal does not change after the contrast agent is injected while the test subject holds his breath; S3, subtracting the pulmonary circulation start time from the pulmonary perfusion end time to obtain the pulmonary circulation time. The pulmonary circulation time evaluation method of the present application can realize bedside detection, is easy to operate, and has great clinical application value.

The present application belongs to the technical field of medical ultrasonic signal processing, and specifically relates to a spermatic vein ultrasonic imaging enhancement system and method based on double-wall filtering and adaptive Doppler signal processing. The system comprises a dynamic reconfigurable analog front end, a dual-channel heterogeneous data processing unit and a closed-loop feedback controller. The method extracts fluid dynamics characteristics in real time through an auxiliary path, intelligently identifies resting state and action mutation state. At the action mutation moment, the physical layer automatically switches the analog filtering parameters to prevent signal saturation, and the digital layer adaptively increases the FIR filter weight to eliminate the ringing artifact; in the resting state, the high-gain analog configuration is maintained and the IIR filter is dominated to capture weak signals. With the delay buffer mechanism, accurate timing alignment of control instructions and imaging data is realized. The present application effectively solves the contradiction between low flow rate detection sensitivity and strong tissue motion interference suppression, eliminates the flicker artifact generated by breath holding action, and significantly improves the diagnosis accuracy of weak reflux.

This invention relates to the field of medical device technology, specifically to a fully automatic medical auxiliary breath-holding device, comprising an inflatable pressure abdominal binder and a head support fixation base, as well as an inflatable pressure nasal clip mechanism disposed on the head support fixation base. The head support fixation base also includes a massage mechanism and a main control box containing three sets of air pump assemblies. These three sets of air pump assemblies are respectively connected to the inflatable pressure abdominal binder, the massage mechanism, and the inflatable pressure nasal clip mechanism via three air supply pipes. The main control box is wirelessly connected to a remote control box. This invention solves the problems of existing medical breath-holding auxiliary devices, such as simple functions, insufficient automation and applicability, susceptibility to patient head movements affecting breath-holding effectiveness, low success rate and poor image quality for some patients with poor cooperation, time-consuming and laborious procedures, and inability to alleviate patient anxiety during examinations, which can affect breath-holding duration and effectiveness.

This invention discloses a low-pass filtered non-breath-hold saline angiography combined with cardiac mirror contrast imaging for lung perfusion imaging, belonging to the field of medical imaging technology. The method includes the following steps: S1: determining whether the subject's tidal impedance variation meets the imaging criteria; S2: injecting contrast agent into the subject to perform angiography; S3: obtaining an impedance decrease signal; S4: combining cardiac mirror contrast imaging with lung perfusion images. This invention solves the problem of low success rate of saline angiography in existing technologies, achieves separation of thoracic impedance caused by tidal breathing and thoracic impedance caused by saline angiography, reduces the influence of the cardiac region on lung perfusion images, further improves the accuracy of lung perfusion imaging, greatly reduces the interference of breath-holding on respiratory circulation, improves the simplicity of clinical application, and expands clinical application scenarios.

Disclosed in the present invention are a motion management method and system, and a related device, which relate to the technical field of radiotherapy. The system comprises: a real-time imaging module used for acquiring a body surface contour of a patient in real time and acquiring a respiratory curve of the patient according to the body surface contour, the body surface contour being used for auxiliary positioning of the patient; and a 4D acquisition module used for sending a time signal to a sliding gantry CT according to the respiratory curve of the patient to establish a respiratory phase synchronization timing sequence, wherein when a treatment couch is at a scanning position of the sliding gantry CT, according to a real-time respiratory signal of the patient, 4DCT images or breath-hold images of the patient in different respiratory phases are acquired using the sliding gantry CT. The 4DCT images or the breath-hold images are used for registration with a positioned 4DCT image, thereby overcoming the drawbacks that previously only tumor images at a certain respiratory phase are obtainable and the images are prone to motion artifacts, resulting in errors in registration. As a result, the registration accuracy of a tumor that is greatly affected by respiratory motion is improved, and the clinical efficiency is enhanced.

A medical system (100, 300) is disclosed that includes a memory (110) storing machine executable instructions (112) and a pulse sequence database (114). The pulse sequence database includes a magnetic resonance fingerprinting pulse sequence (604, 1000, 1002). Execution of the machine executable instructions causes the computing system (104) to: receive (200) calibrated breathing data (116) describing a plurality of breathing phases of the subject (322); identifying (202) the breath-holding data portion (118); identifying (204) an active breathing data portion (120); determining (206) a subject-specific breath-holding duration (122) using the breath-holding data portion; determining (208) a subject-specific active breathing duration (124) using the active breathing portion; and selecting (210) the selected magnetic resonance fingerprinting pulse sequence (126) and the selected magnetic resonance fingerprinting dictionary (128) from the pulse sequence database using the subject-specific breath-holding duration and the subject-specific active breath duration.

The present application relates to a kind of cardiac magnetic resonance longitudinal relaxation time measurement method, medium and equipment.The measurement method includes the following steps: S1 uses MOLLI sequence respectively before and after scanning contrast;Specifically, in the before and after scanning contrast, by setting different initial inversion time TI, setting 3 groups of LL experiment LL1, LL2, LL3 triggered by continuous ECG, enough relaxation curve sampling points are obtained after fusion;And data is collected at the end of diastole of cardiac cycle, and 1 image is obtained per heartbeat;S2 image processing.This measurement method can realize single-pixel high-resolution T1 mapping under the breath holding of selection data acquisition and multi-LL experiment data fusion, give consideration to high accuracy, high resolution and high efficiency, and have good compatibility and practicality, provide new scheme for early diagnosis of heart disease, lesion quantification and prognosis evaluation, have wide clinical application prospect.

The present application relates to magnetic resonance examination device technical field, specifically to a kind of cardiac magnetic resonance examination device, including fixed plate and electrocardiogram control patch, fixed plate is equipped with chest coil;Fixed plate is detachably connected with detection plate, detection plate is equipped with breathing training component for exerting chest pressure, breathing training component is electrically connected with control panel;Control panel records and draws fluctuation curve based on the pressure data detected by breathing training component, then obtains the breathing interval of patient based on fluctuation curve, sends breath-holding reminding instruction to voice module according to breathing interval;Detection plate side away from fixed plate is equipped with several electrocardiogram monitoring electrode pieces for detecting the quality of heart beat signal strength, detection plate is equipped with driving mechanism for driving electrocardiogram monitoring electrode piece to move in range;The present application is used to assist patient breathing breath control, realize the accurate matching of patient breathing breath opportunity and imaging sequence, reduce the generation of breathing artifact, guarantee the progress of cardiac magnetic resonance.

The present application relates to the technical field of data processing, and discloses a multi-probe radio frequency distributed lung water monitoring system and method, which comprises the following steps: collecting low, high and guard frequency transmission parameters and converting them into a logarithmic domain by deploying a thoracic radio frequency array; fitting a rib quasi-periodic model based on a guard frequency scan to obtain a rib arch trend and a synthetic pitch; estimating effective wavelengths in tissues corresponding to low and high frequencies; obtaining window consistency weights in combination with geometric and wavelength parameters, generating a standard complex response by weighted and normalized logarithmic parameters; performing self-spectrum analysis on the complex response to extract respiratory and heart motion angular frequencies, performing orthogonal projection based on sine and cosine and direct current of the respiratory and heart motion angular frequencies to obtain a modulated slow-varying complex response; taking an initial breath holding as a baseline to construct a complex difference of high and low frequency complex responses, and projecting real and imaginary parts of the complex difference into a two-dimensional vector to generate a lung water index.

The invention relates to the technical field of data processing, and discloses a multi-probe radio frequency distributed lung water monitoring system and method.The method comprises the steps that low, high and frequency protection transmission parameters are collected and converted into a logarithm domain by deploying a thoracic radio frequency array; fitting the rib quasi-periodic model based on frequency protection scanning to obtain a rib arch trend and a synthetic pitch; estimating effective wavelengths in tissues corresponding to low and high frequencies; obtaining a window consistency weight by combining geometric and wavelength parameters, and weighting and normalizing logarithmic parameters to generate a standard complex response; carrying out self-spectrum analysis on the complex response to extract respiratory and cardiac angular frequencies, and carrying out orthogonal projection on the basis of sine, cosine and direct current to obtain a modulation slow-varying complex response; taking the initial breath-holding as a baseline, constructing a high-low frequency complex response complex number difference, and performing two-dimensional vector projection on real and imaginary parts of the high-low frequency complex response complex number difference to generate a lung water index.

This invention discloses a 4D-CT-based method for visualizing lung perfusion, belonging to the field of intelligent medical technology. The method includes: acquiring 4D-CT scan data of a patient's lungs; acquiring the patient's cardiac waveform based on the scan data; acquiring the patient's lung waveform based on the scan data; performing correlation analysis on the cardiac and lung waveforms to obtain a correlation coefficient; and outputting a time-series color image of lung perfusion based on the correlation coefficient. This invention can directly utilize conventional breath-hold 4D-CT volumetric data, intuitively presenting the propagation characteristics of lung perfusion without the need for additional hardware or examination procedures. This method does not require the injection of contrast agents, completely avoiding the risks associated with contrast agents, and has better safety and repeatability. Furthermore, the overall calculation process is highly automated and has a short detection time, improving examination and evaluation efficiency to a certain extent.

The present application relates to the field of virtual reality, in particular to a lung rehabilitation nursing psychological counseling method and system based on virtual reality. The method collects the chest and abdominal girth change signal of the patient, calculates the respiratory flow rate curve through band pass filtering and peak detection algorithm, identifies the inspiration starting point, expiration starting point and breath holding starting point on the respiratory flow rate curve as the respiratory phase turning point. The digital phase-locked loop mechanism is introduced, the respiratory phase turning point is taken as the reference clock signal, the actual presentation time of the virtual visual and auditory stimulation is taken as the output signal of the voltage-controlled oscillator, the rendering pipeline delay of the visual and auditory generation component is adjusted through closed-loop feedback, so that the phase delay of the virtual visual and auditory stimulation is constantly within the preset neuromuscular response threshold. The present application eliminates the phase lag and drift phenomenon between the audio-visual guide signal and the real breathing action of the patient, and enhances the neural drive synchronization of the diaphragm and auxiliary respiratory muscles under the rhythmic audio-visual stimulation.

The invention relates to the technical field of medical data processing, and discloses an anatomical structure stability calculation processing method and a system thereof, medical image scanning is carried out on a user in a free breathing state and at different breath-holding moments, and based on all scanned medical images, the stability of the anatomical structure is calculated. Respectively calculating volume data of the left lung and the right lung in each scanning; the volume difference index is calculated according to the volume data of the left lung, the volume difference index is calculated according to the volume data of the right lung, and when the volume difference indexes of the left lung and the right lung meet a second preset condition, it is judged that the stability of the anatomical structure of the user reaches the standard. According to the method, stability evaluation is carried out through objective and quantitative lung volume difference indexes, a mode depending on subjective experience of an operator is replaced, and therefore when the DIBH technology is applied, reliable guarantee is provided for accurate and repeatable positioning of the thoracic cavity anatomical structure.

The invention discloses wearable laser dynamic breath-holding training equipment. The wearable laser dynamic breath-holding training equipment is characterized by comprising a control terminal, an arc-shaped attaching belt, a pressure sensor array, a laser projection unit and a feedback prompting device; a control unit is arranged in the control terminal; the arc-shaped attaching belts are connected to the two sides of the control terminal respectively, and the two ends of each arc-shaped attaching belt are connected through an adjustable connecting structure so as to form an annular structure capable of being worn on the thorax in a surrounding mode. The pressure sensor array is arranged on the inner side of the arc-shaped attaching belt, and the laser projection unit is arranged on the top of the control terminal. The prompt module is arranged on the front end surface of the control terminal; the control unit is electrically connected with the pressure sensor array, the laser projection unit and the prompt module.

A system and method for improving a quality of images for local registration where a position of a sensor is monitored to determine whether a breath hold plateau has been achieved, and following imaging is monitored to determine whether the sensor position has returned to a pre-breath hold position.

The utility model provides a breath-holding training device, and belongs to the technical field of medical instruments. Comprising an adjustable fixing component and a pressure measuring component. The adjustable fixing component comprises two PVC strips which surround the waist and the abdomen and have semicircular sections, external threads are arranged on the outer sides of the two PVC strips, and an adjusting ring is jointly screwed on the two PVC strips through the external threads. The pressure measuring component comprises a shell and elastic pieces arranged on the two sides in the shell, pressure sensors are arranged on the separated sides of the two elastic pieces, connecting pieces sliding relative to the shell are arranged on the opposite sides of the two elastic pieces, and the connecting pieces are connected with the corresponding PVC strips. According to the invention, the patient can carry out breathing and breath-holding training in any required place, and the applicability is high.

The utility model relates to the technical field of breathing auxiliary assemblies, and provides a breathing auxiliary assembly and breathing treatment equipment. A breathing assisting assembly comprises a nose clip assembly which comprises two nose pressing pieces used for being attached to the nose of a user and a nose clamping clip used for being connected with the nose of the user in a clamping mode; the two nose pressing pieces are connected with the two ends of the nose clamping clip respectively. The blowing nozzle assembly is used for being detachably connected to an air outlet of a user side of the respiratory treatment equipment. According to the breathing assisting assembly, oxygen can be supplied to a patient through the blowing nozzle assembly; the nose clip assembly can adjust and control the snorting frequency of a user or control the nose of the user to hold breath; the combination of the two can better assist the user in breathing regulation and control in sports such as breathing diagnosis, breathing rehabilitation or breathing treatment.

The invention provides a household radiotherapy rehabilitation management system and method based on multi-mode radiotherapy state pre-judgment, and the system employs a sensor technology, such as an accelerometer, a pressure sensor and the like, carries out the multi-mode motion monitoring of a household patient, monitors the thoracic fluctuation and tidal volume in real time, carries out the quantitative evaluation, and reports to a background. The background adjusts the home training parameters (target thoracic fluctuation and target tidal volume) of the patient in combination with personalized information, historical data and real-time monitoring results of the patient. The personalized tidal volume and thoracic height target values are recommended based on factors such as the body type and the illness state of a patient, and breath-holding training is allowed after the conditions reach the standard. Instant feedback can be provided through wireless transmission and a real-time algorithm, multi-modal data fusion is used for improving quantification accuracy, parameters are dynamically adjusted according to patient data to achieve individuation, collaborative management of hospitals and families is promoted through cloud sharing data, and the problems of lack of real-time feedback, insufficient quantification, individualized adaptation and data intercommunication are solved.

The invention discloses a method and device for judging whether to apply a DIBH technology based on an intelligent generated image, and the method comprises the steps: carrying out the feature vector extraction and model training of a deformation field between free breathing and deep inspiration breath-holding state pairing images, and generating a group principal component analysis model; the method comprises the following steps: by comparing a positioning image of a patient in an individualized deep inspiration and breath-holding state, optimizing principal component feature vector weights of a model and a deformation field, enabling the deformation field to act on a computed tomography image of the patient in a free breathing state, and generating individualized sDIBH-CT; on the basis of the sDIBH-CT, the average heart dose is calculated through radiotherapy target area sketching and plan design, and the reduction value of the average heart dose relative to the free breathing state is obtained; and comparing the reduced value with a preset benefit index to finish screening whether the patient is suitable for the DIBH technology or not. According to the method and the system, the possible benefits of the patient applying the DIBH are obtained in advance, and effective auxiliary decisions are ensured to be obtained clinically.

A computer-implemented method for monitoring and / or controlling a medical imaging procedure on a patient includes receiving breathing information concerning a breathing pattern of the patient and selecting a compliance class from at least two possible compliance classes based on the breathing information, wherein at least one of the possible compliance classes corresponds to a compliance of the acquired breathing information with a given desired breathing and / or breath-holding pattern. The method further includes (1) controlling the medical imaging procedure depending on the selected compliance class and / or (2) outputting non-compliance information to a user and / or storing the non-compliance information with an acquired medical image data when the selected compliance class does not indicate a compliance of the acquired breathing information with the given desired breathing and / or breath-holding pattern.

The invention relates to the technical field of medical instruments, in particular to a liver tumor microwave ablation operation auxiliary device. Comprising an operating bed, a supporting platform arranged on one side of the operating bed, a rotation driving mechanism arranged on the top of the supporting platform, a lifting adjusting mechanism arranged on the rotation driving mechanism and a lifting sliding seat arranged on the lifting adjusting mechanism. The flexible positioning part is arranged on the lifting sliding seat and extends to the position over the operating bed. Controllable pressure is applied to the chest and abdomen through the flexible positioning part, the breathing movement amplitude can be actively and physically limited, and compared with the mode of simply depending on breath holding of a patient, a more stable and more lasting operation environment is created, and the operation difficulty is reduced. After an operation is completed, the whole auxiliary device can be rotated away from the position over an operating bed through the rotation driving mechanism, transferring and carrying of a patient are not hindered at all, and the turnover efficiency of an operating room is improved.

The present invention discloses a system and method for identifying phases of breathing activity and managing exercises. The system includes a wearable device configured to capture physiological data of user comprising acoustic sound signals associated with inhalation, exhalation, and breath holding, and inertial measurement unit (IMU) data including accelerometer, gyroscope, and magnetometer data. A database stores user data and trained models, including probabilistic breath phase, breath phase transition, posture, and stability models. A computing device, in network communication with the wearable device and the database, executes program modules to receive the physiological data, preprocess the sound and motion data from physiological data, and extract features therefrom. The sound data are processed into Mel-frequency cepstral coefficient features, and the motion data are processed into slope-based features. Using these features, the system predicts breath phases in real time, segments individual breath cycles, and determines transitions between inhalation, holding, and exhalation

The utility model provides portable patient breath-holding training equipment, which belongs to the field of breath training equipment, is used for helping a patient to carry out breath-holding training by himself, improving the training efficiency and solving the problem that the existing breath-holding training efficiency is low, and comprises a sensing monitoring mechanism, a guide display mechanism and a signal processing mechanism, a stretching sensor and a pressure sensor in the sensing monitoring mechanism are used for monitoring contour changes and expansion resistance generated by pleuroperitoneal cavities during breathing, and the breathing state of a patient is judged; a displayer in the guiding display mechanism plays state changes collected by the sensing monitoring mechanism in real time, the patient can conveniently observe and adjust the breathing mode by himself, the sound reminding and guiding functions are achieved through a loudspeaker, and the scientificity and effectiveness of training are enhanced; the signal processing mechanism receives and processes state signals from the stretching sensor and the pressure sensor and converts the state signals into playing content easy to understand and operate, the use process of a user is simplified, and the training efficiency is improved.