26 results about "Respiratory gating" patented technology

The hydrogel patch type respiratory gating magnetic resonance device comprises a respiratory gating patch, a pressure signal change receiver, a magnetic resonance main body and an image acquisition workstation, the respiratory gating patch is connected with the pressure signal change receiver; the pressure signal change receiver is connected with the magnetic resonance main body and transmits a pressure change signal to the magnetic resonance main body; the magnetic resonance main body is connected with the image acquisition work station, and the image acquisition work station processes, stores and displays acquired images. The hydrogel patch type respiratory gating magnetic resonance device is simple and feasible in structure, and is adaptive to most of magnetic resonance I (MR I) equipment at present; the device is wide in application range, can be used for patients of different age groups, and even can be used for animal MR examination; under the guidance of a trigger signal, a magnetic resonance main body performs data acquisition at a specific breathing phase so as to reduce artifacts and ambiguity caused by breathing movement, and for a patient needing an interventional operation under magnetic resonance, patch type respiratory gating is convenient for surgical operation and does not affect a surgical area.

The invention provides a respiratory-gating-free free-breathing liver glycogen quantitative magnetic resonance imaging method and system, and the method comprises the steps: applying a chemical exchange saturation transfer imaging sequence to a liver region of a subject, and the imaging sequence comprises saturation pulses of a plurality of saturation frequency deviation points; a radial blade type k-space acquisition strategy is adopted to acquire magnetic resonance signal data, the radial blade type k-space acquisition strategy comprises a plurality of blades, each blade is composed of a group of parallel k-space lines, and different blades are rotationally distributed by taking the k-space center as a rotating shaft; performing image reconstruction on the acquired k space data to obtain magnetic resonance images under different saturation frequency deviations; and performing fitting analysis on the magnetic resonance image by adopting a multi-pool Lorentz model to obtain quantitative information of the liver glycogen. According to the method, the interference of respiratory movement on the CESTMRI data acquisition process can be eliminated, so that the accurate quantification of the liver glycogen in the free respiration state is realized.

The invention relates to the field of exercise training, in particular to a respiratory training guidance system and method.Body part motion data of a target object in a first scene under a plurality of respiratory modes are obtained, so that body surface motion of the target object is determined, and multi-mode respiratory training guidance is provided for the target object; generating a training result record corresponding to breathing training completed by the target object in the first scene; according to the training result record, providing multi-modal respiratory training guidance for the target object in the second scene; whether the target object meets a preset requirement or not in the breathing training period of the second scene is checked; and when the preset requirement is not met, respiratory gating training is provided for the target object. Multi-mode prompts such as audio / video prompts used in the breathing training process are provided for the target object, the target object is guided to achieve the periodic and synchronized breathing rhythm, and it is ensured that the target object executes repeatable and stable breathing.

The utility model relates to the technical field of medical instruments, in particular to a respiratory gating connecting device which comprises a treatment bed, a stand column is arranged on one side of the outer wall of the treatment bed, a mounting plate is arranged on one side of the upper end of the outer wall of the stand column, and a control part for controlling breathing of a patient is arranged at the end, close to the treatment bed, of the mounting plate. According to the device, the nasal splint body is controlled to be opened and closed through the device, so that a patient can autonomously control suffocation and expiration to assist treatment, the whole control part is installed on the stand column and the installation plate, medical staff do not need to frequently install and detach the device, the device can be repeatedly used, and the device is convenient to use. The operation and use are convenient.

Presented herein is an imaging technique named nonstop gated cone-beam computer tomograph (CBCT), for guiding free-breathing respiratory gating radiotherapy of thoracic and abdominal cancer patients (e.g., lung, liver, pancreas). The nonstop gated CBCT technique reduces the data acquisition time to 1 minute and decreases the imaging dose by >40% while simultaneously retaining high quality images was developed. This is done by allowing the gantry to rotate continuously and having the kV x-ray beam on when the patient breathing signal is within the respiratory gate and the x-ray beam off when it is out of the respiratory gate. A machine learning model can be used to reconstruct high-quality CBCT images from the acquired data.

The invention relates to an atomization delivery system based on respiratory gating and drug mist concentration feedback, which comprises a respirator (101), a respirator ventilation pipeline (103) and a drug atomization delivery device (102), and the drug atomization delivery device (102) comprises a main control module, an atomizer module (201), a drug storage bin (202), a drug mist concentration monitoring module and a breathing mask. The main control module generates an atomization driving gating signal according to ventilation parameters of the breathing machine and a drug mist concentration detection result in combination with an atomization gating dynamic calibration algorithm to drive the ultrasonic micro-grid atomization sheet (312) to work; the atomization gating dynamic calibration algorithm comprises the steps that breathing transmission delay calculation is conducted on inspiration phase window recognition based on ventilation parameters and real inspiration phase window recognition based on spectrums, and a calibrated atomization gating signal is obtained. According to the invention, precise, quantifiable and individualized medicine atomization delivery can be realized.

The application discloses a CT real-time 4D gating imaging method based on projection data, and steps of the method comprise the following steps: 1) collecting CT projection of a target to be detected, and dividing the CT projection into multiple groups according to the collection angle; representing each CT projection by using an n-dimensional vector after pixel merging; constructing an original matrix according to the vectors corresponding to the same angle group, extracting principal component information from the matrix based on a PCA method, and obtaining superimposed signals containing respiration and heartbeat; 2) separating the respiration and heartbeat signals from the superimposed signals; performing respiration gating processing on the CT projection according to the respiration signal, and performing gating division on the CT projection in the respiration motion period; performing heartbeat gating processing on the CT projection in the respiration stable period according to the heartbeat signal; 3) reconstructing the CT projection groups after the respiration and heartbeat gating processing to obtain 4D gating imaging of the target to be detected. The application realizes the real-time of CT gating imaging, and improves the gating information extraction precision.

The invention relates to an airway lesion measurement system and method based on composite driving and modeling, the system can enter an airway through a bronchoscope to measure the diameter and length of a lesion site, and the system comprises a composite driving expansion module which comprises a pneumatic bag cavity and a shape memory alloy skeleton and is used for executing an expansion step; the self-locking anchoring module is integrated on the shape memory alloy framework and is used for executing a self-locking step; the three-dimensional dynamic modeling module comprises a sensor array and a data processing unit which are arranged on the shape memory alloy framework and is used for executing a modeling step; and the respiration synchronization module is used for receiving a respiration gating signal of the bronchoscope and controlling the three-dimensional dynamic modeling module to carry out data acquisition in a preset time window of end expiration. Compared with the prior art, the method has the advantages of being efficient in operation, convenient, easy to use, accurate and reliable in measurement performance, good in safety performance and the like.

An example magnetic resonance imaging (MRI) system uses magnetic fields and radio frequency waves to generate anatomical images of a biological organism, such as a human body, for example. The example MRI system can implement a prospective gating technique, such as cardiac gating and / or respiratory gating, to provide some examples, to improve the image quality of the anatomical images. The prospective gating technique utilizes one or more physiological events of the biological organism to trigger the example MRI system to image the biological organism at specific times to improve the image quality of the anatomical images, compensating example for interference that may be introduced by the magnetic fields and / or the radio frequency waves.

The utility model discloses a wireless automatic calibration respiratory gating device which comprises a gating module, a bandage is arranged on the rear side of the gating module, an air bag is arranged on the front side of the gating module, a second air tap is fixedly connected to the rear side of the air bag, the rear end of the second air tap penetrates through the inner side of the gating module, and the rear end of the second air tap is fixedly connected with a second air outlet. An air pump, an acquisition circuit board and a battery are arranged on the inner side of the door control module, an air tap I is fixedly connected to the outer side of the air pump, an air pressure sensor air tap is fixedly connected to the outer side of the acquisition circuit board, and hook-and-loop fasteners I are fixedly connected to the rear side of the door control module and the outer side of the bandage. By arranging the air bag, the bandage, the door control module, the air pump, the first air tap, the second air tap and the air pressure sensor air tap, the bandage is powered by a rechargeable battery, the air pressure of the bandage is automatically adjusted by the built-in air pump until a signal is stably output, and repeated adjustment of the tightness of the bandage is avoided.

Prediction of extrema in respiratory motion and related systems, methods, and devices is disclosed. A method of detecting extrema in respiratory motion includes generating a predicted motion trajectory of respiratory motion, identifying one or more extrema candidates of the motion of the patient responsive to the predicted motion trajectory, and selecting one or more of the one or more extrema candidates to be one or more predicted extrema of the respiratory motion of the patient. An apparatus includes an input terminal configured to receive a respiratory waveform signal and one or more processors configured to generate predictions of extrema of the respiratory waveform signal before occurrences of the extrema. An imaging system includes a gating signal generator configured to predict extrema of a respiratory waveform and an imaging device configured to capture images of a patient responsive to a respiratory gating signal from the gating signal generator.

This application discloses a multimodal real-time imaging fusion method and system for MRI interventional therapy, relating to the technical field of medical diagnostics. It includes acquiring the patient's real-time respiratory gating signal, triggering an acquisition process to obtain ultrasound and MRI images; fusing the ultrasound and MRI images to obtain a multimodal image data stream; outlining vascular-neural structures and highlighting their borders, triggering an alarm when an interventional device approaches the highlighted area; spatially registering the multimodal image data stream to obtain spatially aligned fused image data; and overlaying the ultrasound and MRI images of the target lesion area, with a virtual knob controlling the display transparency of the ultrasound and MRI images. This application improves the accuracy and efficiency of multimodal image fusion during MRI interventional therapy.

The invention discloses a respiratory gating system device for a radiotherapy positioning CT end, and relates to the technical field of positioning CT corollary equipment, the respiratory gating system device for the radiotherapy positioning CT end comprises a limiting assembly installed on a bed board of a scanning bed, a sliding assembly comprises a track and a telescopic rod, the track is installed on a ceiling, and the telescopic rod is installed on the track in a sliding mode; the camera collection assembly comprises a camera, one end of the camera is detachably installed on the limiting assembly, the other end of the camera is fixedly installed on the sliding assembly, a cable of the camera collection assembly is installed on the sliding assembly, the camera collection assembly is rapidly fixed to the tail end of the CT scanning bed by hoisting the upper end of the camera collection assembly and limiting and fixing the lower end of the camera collection assembly, and the fixing efficiency is improved; the operation process is reduced, the cable is arranged on the sliding assembly, the influence of the cable on personnel or articles is reduced, and the use safety of the cable is improved.

The invention discloses a breathing deformation model construction method and a breathing motion compensation method.The breathing deformation model construction method comprises the steps that an expiration end-stage image and an inspiration end-stage image of a patient before an operation are obtained; according to the end-expiratory image and the end-inspiratory image, determining an end-expiratory vertex set and an end-inspiratory vertex set of the at least one anatomical structure; determining a breathing deformation sequence of each anatomical structure according to the end expiration vertex set and the end inspiration vertex set of each anatomical structure; and fusing the breathing deformation sequence of each anatomical structure to obtain a breathing deformation model. According to the method, the breathing deformation model is constructed by using the pre-operative end-expiratory image and end-inspiratory image, and the method does not need to depend on invasive / non-invasive implanted markers or additional respiratory gating information, so that the respiratory movement prediction of the anatomical structure of the patient is realized, and the clinical operation complexity is reduced.

The invention discloses a free breathing abdomen magnetic resonance multi-parameter quantitative imaging method and system based on synthetic data driving, and relates to the field of magnetic resonance imaging. Comprising the steps of designing and selecting a rapid imaging sequence; constructing an abdomen multi-parameter data sample; carrying out abdominal breathing motion simulation modeling and deformation field generation; generating a deep neural network training data set containing respiratory movement information; designing a special deep neural network structure; training a deep neural network; and performing magnetic resonance image reconstruction and multi-parameter quantitative output. According to the method, respiratory gating or additional correction is not needed, T1, T2, M0 and B1 parameter diagrams can be synchronously reconstructed, the problem of motion artifacts is effectively solved, meanwhile, other non-ideal factors are corrected, and the image quality is improved.

The invention relates to the technical field of radiotherapy, and provides a radiotherapy assisting method based on wireless intelligent glasses, which comprises the wireless intelligent glasses, a built-in microprocessor, a micro display, a loudspeaker and a first wireless communication module. The radiotherapy respiratory gating system is provided with a second wireless communication module and is used for outputting real-time respiratory gating parameters; the radiotherapy information management system is used for storing and issuing personalized guide strategies corresponding to the radiotherapy plans of the patients; the first wireless communication module and the second wireless communication module establish a hospital intranet exclusive link, so that the wireless intelligent glasses can receive respiratory gating parameters in real time in the treatment process; the microprocessor synchronously converts respiratory gating parameters into visual graphs and voice instructions, bimodal guide information is projected to a patient through the micro display and the loudspeaker, an interaction mechanism of real-time parameter visualization-patient active adjustment is constructed through the intelligent glasses, and accurate feedback and immediate adjustment of the respiratory state are achieved through bimodal interaction.

The invention relates to the technical field of medical image analysis, in particular to a dynamic DR lung blood flow perfusion diagnosis system based on deep learning, which comprises a dynamic DR imaging module, the dynamic DR imaging module combines a self-adaptive dose, frame rate adjustment and multi-modal motion compensation method, and the dynamic DR imaging module is used for performing dynamic DR lung blood flow perfusion diagnosis by adopting a first acquisition mode evaluation and dynamic parameter calibration strategy. According to the method, the radiation dose can be strictly controlled, meanwhile, the collected dynamic DR image can be processed through infrared respiratory gating, personalized lung field positioning and a non-local mean filtering algorithm combined with attention guidance, it is ensured that the processed dynamic DR image data is free of artifacts, full in coverage and high in fidelity, and the image quality of the dynamic DR is greatly improved. Meanwhile, the problems that the prior art mainly develops in the two directions of static dissection imaging and dynamic function imaging, but has significant shortages and is difficult to meet the clinical requirements of low radiation, high dynamic and full view are solved.

The embodiment of the invention provides a three-dimensional model reconstruction method and device for a medical image, equipment and a medium. According to the embodiment of the invention, a respiratory gating technology is utilized to construct a medical image data set which is acquired in a specified time period and is provided with a shooting angle label. Constructing a three-dimensional model and optimizing the data set by iteration, reconstructing the three-dimensional model based on the current data set in each iteration, and generating a corresponding projection image according to the shooting angle; and identifying and removing the medical images with the error indexes greater than a preset threshold value by calculating the error indexes. And performing reconstruction, projection, comparison and elimination through iteration, and when the error indexes corresponding to all the medical images in the data set do not exceed a preset threshold value, ending iteration and outputting a three-dimensional model. According to the embodiment of the invention, motion artifacts introduced by inconsistent anatomical states represented by the medical images collected in the data set can be eliminated, so that an accurate and reliable three-dimensional reconstruction result is obtained.

To provide a method of correcting body deformation during image acquisition.SOLUTION: A garment for real time detection of body deformation during an image scan includes a front portion, made of a compression material and having a plurality of fiber Bragg gratings (FBGs). The garment includes a plurality of light emitters, each light emitter configured to pulse light waves through a corresponding FBGs and a plurality of light sensors, each light sensor attached to a corresponding FBG and configured to receive pulsed light waves. A processor obtains data through a data acquisition module configured to receive from the light sensors peak wavelengths reflected by the FBG based on the effective shifts of the Bragg wavelengths of the FBGs aligned along the cartesian coordinate system, the processor may correct acquired image data or re-direct an external beam treatment to compensate for body deformation during an image scan.SELECTED DRAWING: Figure 2A

1. Name of the product in this design: Breathing Gated Graphical User Interface for Electronic Devices. 2. Intended use of this design: for use in an electronic device. 3. The key design feature of this product is its graphical user interface. 4. The image or photograph that best illustrates the design's key points: the front view. 5. Electronic devices are designed in a conventional way, so other views are omitted. 6. Purpose of the graphical user interface: It is used to delineate lung windows in images generated from small animal experiments, generate corresponding respiratory waveforms, select appropriate waveforms, and perform amplitude or temporal binning on the waveform data for further offline reconstruction. 7. Human-computer interaction method of graphical user interface: By selecting "Generate Waveform" in the lower right corner of the main view pop-up window, the interface change state diagram 1 is displayed. The interface change state diagram 1 is the waiting interface for waveform generation. After the waveform is generated, the interface change state diagram 2 is displayed.

The invention provides a respiration monitoring method, a gating control method, a positioning method, a system and equipment, and belongs to the technical field of medical equipment. The method comprises the following steps: sending near-infrared random speckles to a measured target through a near-infrared speckle projection module; acquiring a plurality of body surface images of the measured target subjected to near-infrared random speckle projection in real time through a binocular image acquisition module; determining a body surface three-dimensional point cloud of the measured target according to the plurality of body surface images; and according to the body surface three-dimensional point cloud, determining a respiration curve of the measured target. The near-infrared random speckles are projected to the body surface of the detected target, so that non-contact measurement and sensing are realized, additional devices do not need to be added on the body of the detected target, and the comfort of the detected target in the whole detection process is improved. Near-infrared random speckles and binocular stereoscopic vision are fused, so that the reliability of the body surface three-dimensional point cloud of the measured target is enhanced, and an accurate respiratory gating signal is provided for medical imaging equipment or radiotherapy equipment.

Presented herein is an imaging technique named nonstop gated cone-beam computer tomograph (CBCT), for guiding free-breathing respiratory gating radiotherapy of thoracic and abdominal cancer patients (e.g., lung, liver, pancreas). The nonstop gated CBCT technique reduces the data acquisition time to 1 minute and decreases the imaging dose by >40% while simultaneously retaining high quality images was developed. This is done by allowing the gantry to rotate continuously and having the kV x-ray beam on when the patient breathing signal is within the respiratory gate and the x-ray beam off when it is out of the respiratory gate. A machine learning model can be used to reconstruct high-quality CBCT images from the acquired data.

The invention relates to the technical field of medical monitoring equipment, in particular to a visual respiratory gating indicating system which comprises a rack, and a perspective unit, a path planning unit and an image processing unit are arranged on the rack; the perspective unit has a perspective function and forms a real-time picture; the path planning unit shoots a static perspective image and accurately positions a target on the static perspective image; the image processing unit processes images output by the perspective unit and the path planning unit through an image processing technology, and provides indication for the real-time position of the target through the prompting unit; compared with the prior art, a positioner and a sensor structure do not need to be embedded in the target position of a patient, the image processing unit is used for processing and recognizing the difference between a real-time image and a static perspective image so as to directly judge the breathing condition, calculation processing through a rigorous algorithm is not needed, the respiratory gating processing efficiency is greatly improved, and the system is suitable for popularization and application. And accurate positioning of a target point can be realized while the pain of a patient is reduced.

The utility model discloses a respiratory gating device for X-ray shooting, which belongs to the technical field of medical equipment and comprises a working plate, an equipment box is fixedly connected to the upper surface of the working plate, a patch is placed on the upper surface of the working plate, connecting plates are fixedly connected to the left side and the right side of the patch, a mounting groove is formed in the surface of the equipment box, and the mounting groove is fixedly connected with the equipment box. And the equipment box is connected with the patch through an external lead. According to the respiratory gating device for X-ray shooting, in the using process, a patch is attached to the human body through a binding belt, when a wire connector is in butt joint, the connector is inserted into a mounting groove in the surface of an equipment box, at the moment, a limiting rod is pulled, the tail end of the limiting rod does not make contact with a clamping plate, and then the clamping plate is clamped by the clamping plate under the action of a first spring and the limiting plate; and finally, the clamping plates on the left side and the right side clamp the wire joint, so that the condition that the wire joint accidentally falls off during working is avoided, and the stability is ensured.

The utility model provides a respiratory gating test simulation device and an emission computed tomography system, which are used for respiratory gating test of the emission computed tomography system, and comprise a cavity for accommodating an air bag for collecting physiological movement signals; the point source device is connected with the air bag and is used for placing a radiation point source; the movement mechanism is connected with the air bag and / or the point source device; and the driving source is connected with the movement mechanism and is used for driving the movement mechanism to move, so that the air bag and the point source device synchronously and periodically move under the driving of the movement mechanism. The respiratory gating test simulation device and the emission computed tomography system replace experimental animals to simulate respiration, use of the experimental animals is reduced, use of drugs is reduced, time for operators to make contact with radioactive sources is shortened, and occupational protection is facilitated. Simulation of different breathing cycles and breathing depths can be carried out, the stability is higher, and the cost is lower.