52 results about "Respiratory gating" patented technology

The invention discloses a radiotherapy beam output control method, system, device and equipment and a medium, and relates to the technical field of radiotherapy control, and the method comprises the steps: obtaining the spatial position information of a patient body surface marking module in real time; wherein the marking module comprises a fluorescent marking ball, and the fluorescent marking ball is fixed in a breathing movement remarkable area of a patient; performing information conversion processing on the spatial position information according to a time axis direction to obtain target breathing state change information of the patient, and importing the target breathing state change information into a corresponding preset breathing standard normal form to check whether the target breathing state change information meets a radiotherapy treatment condition; and if the target breathing state change information meets the radiotherapy treatment condition, recommending a corresponding breathing gating window threshold value, and dynamically controlling the output of the radiotherapy beam according to the breathing gating window threshold value. The automatic monitoring of the breathing state change is realized, and the output of the radiotherapy beam is accurately controlled according to the monitoring result.

A method for compensating for dynamic changes in a body of a patient during a controlled interaction with the body includes acquiring data from at least one sensing device disposed on the body and detecting a change along at least one optical fiber of the sensing device caused by dynamic changes associated with the body during the controlled interaction. A respiratory gating signal is generated based on the change along the at least one optical fiber of the sensing device measured over time. The method further comprises controlling relative movement between the body and an interactive device in response to the respiratory gating signal to compensate for the dynamic changes associated with the body during the controlled interaction.

A method for compensating for dynamic changes in a body of a patient during a controlled interaction with the body includes acquiring data from at least one sensing device disposed on the body and detecting a change along at least one optical fiber of the sensing device caused by dynamic changes associated with the body during the controlled interaction. A respiratory gating signal is generated based on the change along the at least one optical fiber of the sensing device measured over time. The method further comprises controlling relative movement between the body and an interactive device in response to the respiratory gating signal to compensate for the dynamic changes associated with the body during the controlled interaction.

The embodiment of the invention provides a target area positioning and adjusting method, system and device based on body surface tracking and respiratory gating and a medium, and the method comprises the steps that a breathing time phase is determined based on breathing signal data of a patient; acquiring contour data corresponding to the breathing time phase based on the breathing time phase; the body surface data and the contour data are registered, and the target area position of the patient is determined; in response to the fact that the target area position is not in the target area, pose adjustment is conducted on the patient, and the updated target area position is determined till the updated target area position is located in the target area.

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.

A method and system of compensating for body deformation during image acquisition or external beam treatment includes acquiring image data of a body and peak wavelength data from a plurality of fiber Bragg gratings (FBGs) disposed on the body aligned along a predetermined coordinate system on the body, such as a cartesian coordinate system. The method further comprises detecting effective shifts of the Bragg wavelengths of the FBGs caused by body deformation during image acquisition, and controlling the movement of the body through a cavity in a scanning device and controlling the acquisition of the image data or external beam treatment during body deformation based on the effective shifts of the Bragg wavelengths of the FBGs.

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.

The invention belongs to the technical field of biomedical engineering, and discloses a preoperative human body intelligent positioning system for medical images, which comprises a data standardization unit for setting a sampling frequency based on a preset respiratory gating signal, collecting multi-modal image data of a patient according to the sampling frequency, and storing the multi-modal image data in a database; processing by using a point location matching method to obtain standardized multi-modal image data; the deformation tracking unit is used for carrying out difference operation and squaring on gray values of different position points in the standardized multi-mode image data to obtain different error squares; combining all error squares to obtain an error square matrix, and generating an error distribution thermodynamic diagram based on the error square matrix; inferring tissue deformation through an error distribution thermodynamic diagram, and updating tissue deformation field parameters by adopting an optimization algorithm; the accuracy and individuation level of preoperative planning are improved, the dynamic assistance and real-time compensation capability can be provided in the operation, and finally high-precision, low-risk and intelligent human body preoperative positioning and navigation are achieved.

A method and system of compensating for body deformation during image acquisition or external beam treatment includes acquiring image data of a body and peak wavelength data from a plurality of fiber Bragg gratings (FBGs) disposed on the body aligned along a predetermined coordinate system on the body, such as a cartesian coordinate system. The method further comprises detecting effective shifts of the Bragg wavelengths of the FBGs caused by body deformation during image acquisition, and controlling the movement of the body through a cavity in a scanning device and controlling the acquisition of the image data or external beam treatment during body deformation based on the effective shifts of the Bragg wavelengths of the FBGs.

The invention relates to a CT-guided thoracic and abdominal puncture guiding method for reducing the influence of respiratory movement. The method comprises the following steps that S1, a respiratory movement curve of a target object in a free breathing state is obtained; s2, in the free breathing state of the target object, according to the breathing motion curve, controlling CT imaging equipment to scan the target tissue through breathing gating in the curve area of the target object, and obtaining a CT scanning image of the target object; s3, the CT image in the S2 is matched with the respiratory movement curve in the S1, and the marked curve serves as a reference curve of the puncture moment; s4, determining a body surface needle insertion position of the puncture target tissue according to the CT image obtained in S2; and S5, monitoring the respiratory movement of the target object during puncture, obtaining a respiratory movement curve, and when the respiratory movement curve is located at the target tissue image identification point in the reference movement curve in the S3, determining the puncture moment for the target tissue. According to the invention, the puncture accuracy can be improved.

For example, a magnetic resonance imaging (MRI) system uses a magnetic field and radio frequency waves to generate anatomical images of a biological organism, such as a human body. Example MRI systems may implement prospective gating techniques, such as electrocardiographic gating and / or respiratory gating, to provide some examples to improve image quality of anatomical images. Prospective gating techniques utilize one or more physiological events of a biological organism to trigger an example MRI system to image the biological organism at a particular time to improve image quality of anatomical images, compensate for interference that may be introduced by magnetic fields and / or radio frequency waves.

The invention belongs to the technical field of puncture, and particularly discloses a respiratory gating device for assisting puncture and a control method thereof.The respiratory gating device comprises a mechanical airbag unit and a control measurement unit; the control method comprises the steps that the processor receives a user instruction of the console to control the air pump to inflate and deflate the arched elastic inflatable air bag through the electromagnetic valve, the breathing state of a user is detected through the pressure sensor, and meanwhile waveform display is provided through the waveform displayer. The mechanical air bag unit and the control measurement unit are arranged, and the mechanical air bag unit is effectively integrated on a sickbed, so that waveform display is provided, meanwhile, the device can be placed in the working visual field of a doctor, and meanwhile, the needle inserting time is prompted in an acousto-optic mode; in addition, a gating signal provided by the device can also be used as a triggering signal of CT exposure, so that the breathing state corresponding to puncture and the breathing state corresponding to an image are completely consistent.

The invention discloses a CT real-time 4D gating imaging method based on projection data. The method comprises the following steps: 1) acquiring a CT projection of a target to be detected and dividing the CT projection into a plurality of groups according to an acquisition angle; carrying out pixel combination on each CT projection and then adopting an n-dimensional vector for representation; an original matrix is constructed according to the vectors corresponding to the same angle group, principal component information is extracted from the matrix based on a PCA method, and superposed signals containing respiration and heartbeat are obtained; 2) separating breathing and heartbeat signals from the superposed signals; performing respiratory gating processing on the CT projection according to the respiratory signal, and performing gating division on the CT projection in the respiratory movement period; carrying out heartbeat gating processing on the CT projection in the breathing stationary period according to the heartbeat signal; and 3) reconstructing the CT projection groups after breathing and heartbeat gating processing to obtain a 4D gating image of the to-be-detected target. The real-time performance of CT gating imaging is achieved, and meanwhile the gating information extraction precision is improved.

A method for compensating for dynamic changes in a body of a patient during a controlled interaction with the body includes acquiring data from at least one sensing device disposed on the body and detecting a change along at least one optical fiber of the sensing device caused by dynamic changes associated with the body during the controlled interaction. A respiratory gating signal is generated based on the change along the at least one optical fiber of the sensing device measured over time. The method further comprises controlling relative movement between the body and an interactive device in response to the respiratory gating signal to compensate for the dynamic changes associated with the body during the controlled interaction.

To improve the workflow related to the respiratory gating.SOLUTION: A nuclear medicine diagnosis apparatus according to an embodiment includes: a control unit configured to generate a feature vector for each of the mini frames from list mode data acquired by performing a nuclear medicine scan and to calculate a Euclidean distance between each of the feature vectors corresponding to frames and a reference phase vector; a determination unit configured to calculate, on the basis of the Euclidean distances, a mean Euclidean distance for a plurality of conditions obtained by varying a percentage of counts to be used in a reconstructing process, and to determine the percentage on the basis of a relationship between the percentage and the mean Euclidean distance; and a reconstruction unit configured to generate a gated image by carrying out an image reconstruction while using the determined percentage as a gating condition.SELECTED DRAWING: Figure 2

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.

The invention is applicable to the technical field of medical instruments, and provides a respirator for patient radiotherapy, which comprises an electronic device casing, a notebook computer rack, a network connection assembly, a patient respiratory system and an oxygen uptake system, the notebook computer rack is mounted at the top of the electronic device casing, the patient respiratory system is connected with the notebook computer rack through the network connection assembly, and the oxygen uptake system is connected with the notebook computer rack through the network connection assembly. The oxygen uptake system is arranged on a respiratory system of a patient, and the respiratory system is worn on the head of the patient; a monitor, a keyboard and a mouse disc are arranged on the same side of the top of the electronic device shell from top to bottom, the keyboard is connected with the mouse disc through a mechanical arm, the monitor and the keyboard are electrically connected with the mouse disc, a main power supply switch is further installed on the side face of the electronic device shell, and ON / OFF keys are arranged on the main power supply switch. The respirator can improve tolerance and increase breath-holding time, so that treatment time is shortened, comfort of a patient is improved, compliance is improved, applicable people of respiratory gating are increased, and radiotherapy efficiency is improved.

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 invention discloses a respiratory gating training system, method and equipment based on visual guidance and a medium, and relates to the technical field of radiotherapy equipment, and the respiratory gating training system comprises a first camera collection unit which is used for collecting face information of a current patient so as to carry out identity verification on the current patient; the second camera acquisition unit is used for acquiring the body surface feature information change of the current patient during breathing after the identity verification is passed; the respiratory gating workstation is used for carrying out information conversion processing on the body surface feature change information to obtain respiratory feature information and selecting a corresponding respiratory training mode; the signal transmission unit is used for transmitting the breathing characteristic information to the visual display unit; the visual display unit is used for displaying the breathing feature information in real time, so that the current patient adjusts current breathing based on the breathing feature information and the breathing training mode, and the second camera collection unit is informed of collection of body surface feature information changes during breathing till the breathing feature information meets breathing training stopping conditions. The autonomous respiration training of the patient is realized.

An exemplary magnetic resonance imaging (MRI) system uses a magnetic field and radio frequency to generate anatomical images of a biological organism such as, for example, the human body. The exemplary MRI system may implement prospective gating techniques, such as cardiac gating and / or respiratory gating to name a few, to improve the image quality of the anatomical images. The prospective gating techniques utilize one or more physiological events of the biological organism to trigger the exemplary MRI system to image the biological organism at a specific point in time, and to compensate for, for example, interference that may be introduced by the magnetic field and / or radio frequency, in order to improve the image quality of the anatomical images. TIFF2025519068000002.tif88170

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.

The invention relates to the technical field of biosensors, in particular to a high-reliability biosensor based on a ReS2 / PVP nano composite material, a manufacturing process and application. The biosensor is prepared by taking an LCP (Liquid Crystal Polymer) copper interdigital electrode as a basic electrode and depositing a sensing layer on the basic electrode; the prepared biosensor has the advantages of being small in size, wearable, high in reliability, sensitive in reaction, simple in detection technology and low in production cost, has selectivity on adenosine triphosphate (ATP), has a wide application prospect, and particularly has a good application prospect when being applied to a tumor radiotherapy respiratory gating system. The real-time continuous respiration monitoring can be carried out.