73 results about "Respiratory gating" patented technology

Methods, systems and devices are presented that provide improved medical diagnostic and intervention procedures such as magnetic resonance imaging, cardiac imaging, cardiac nuclear scintigraphy, computed tomography, echocardiography, imaging to direct laser ablation, imaging to direct radio frequency radiation ablation, imaging to direct gamma knife radiation therapy, and imaging to direct radiation therapy by respiratory gating. In a preferred embodiment, one or more balloon pressure probes within a catheter are placed into the esophagus and detect pressure within the esophagus to infer respiratory air-flow. Other probes such as those based on fiber optics and other useful materials are described. Many of these devices interact poorly or not at all with magnetic and electromagnetic fields, and are particularly useful for use in respiratory gating of MRI.

The invention relates to a respiratory motion determination apparatus for determining respiratory motion of a living being (3). A raw data providing unit (2) provides raw data assigned to different times, wherein the raw data are indicative of a structure like the apex of the heart muscle, which is influenced by cardiac motion and by respiratory motion, and a reconstruction unit (6) reconstructs intermediate images of the structure from the provided raw data. A structure detection unit (7) detects the structure in the reconstructed intermediate images, and a respiratory motion determination unit (10) determines the respiratory motion of the living being based on the structure detected in the reconstructed intermediate images. This allows determining respiratory motion with high accuracy, without relying on, for example, a stable correlation between a tracking signal of an external respiratory gating device and respiratory phases.

The invention discloses a respiratory gating system and a control method based on three-dimensional vision. The respiratory gating system comprises a target, a three-dimensional vision measuring unit, a data analysis unit, a communication unit and a control unit. The three-dimensional vision measuring unit tracks and positions the target in real time, and a three-dimensional coordinate sequence is obtained. The data analysis unit processes the coordinate sequence, a respiratory movement curve is obtained, and a respiratory gating signal is generated at the position of the set threshold. The communication unit is responsible for conducting interaction with medical image equipment and finishing triggering collecting of the medical image equipment by the respiratory gating signal. The control unit is responsible for controlling the three-dimensional measuring unit, the data analysis unit and the communication unit so as to finish the whole system function coordinately. The respiratory gating system is simple in structure, high in accuracy, high in reliability and easy to operate.

The invention relates to a method for generating digital respiratory gating signals based on an abdominal body surface outline, which comprises the following steps: (1) respectively extracting the abdominal body surface outline in each frame image of a reference abdominal video, and calculating normalized correlation coefficients NCC of the abdominal body surface outline at each moment and a reference outline to obtain an NCC-time curve; (2) arranging a grating window on the NCC-time curve, and providing a grating type label for the each frame image; (3) converting the each frame image of the reference abdominal video into a column vector to form a training set containing the type label; (4) reducing the dimension of the training set to obtain a support vector omega and a classification threshold value b by training; and (5) converting a real-time abdominal video into a column vector, and using the support vector omega and the classification threshold value b to calculate a sorting signal of each column vector to obtain sorting signals, namely, the gating signals. The method can lower cost, cannot bring uncomfortable feeling for a patient, and has good tolerance.

The invention, which belongs to the medical equipment technology field, relates to a respiratory gating indication method used for radiotherapy and an apparatus thereof. The method comprises the following steps that: a remote controller that includes a CPU microprocessor, an arrangement key, control keys, a liquid crystal display, an infrared remote controlled coding circuit and an emitting device of the circuit is arranged; an infrared reception and decoding circuit, a second CPU microprocessor, an auxiliary LED indicating lamp and a nixie tube display are arranged; an indicator comprising a third CPU microprocessor, a drive circuit, a main LED indicating lamp and a sounder is arranged; and a power source is arranged. According to the invention, clear light and sound indication can be provided for a patient; therefore, an influence of a respiratory movement can be effectively reduced; localization precision of thoracic-abdominal tumor radiation therapy target region can be substantially improved; unnecessary irradiation on a normal organ and a normal part can be effectively avoided; and occurrences of phenomena of damage and necrosis of normal cells can be avoided or reduced. Besides, the apparatus is cheap and can be applied conveneitnly. Moreover, the method and the apparatus can be widely applied to radiation therapy of several kinds of tumors like a thoracic tumor, an abdominal tumor, a lung tumor, a liver tumor, a renal tumor and a breast tumor and the like.

The invention discloses a traditional Chinese medical science pulse-taking instrument. The traditional Chinese medical science pulse-taking instrument comprises a pulse-taking pillow, a sensor assembly, a respiratory gating system and a computer. The sensor assembly comprises a structure which is composed of a handle, a screw rod, a fixing frame and a sliding piece and can adjust pulse-taking pressure, an outer packaging barrel and a sensor vector and protective screen; the sensor assembly is connected with the pulse-taking pillow through a fixing belt, connected with a wireless data collection and emitting card through a first data line, and then connected with the respiratory gating system through a second data line; the wireless data collection and emitting card communicates with a data receiving card through a Bluetooth method, and the information collected by the sensor assembly is emitted in a wireless communication mode; the data receiving card is connected with the computer through a third data line, the received information is transmitted to the computer, and the pulse information is displayed after calculation of the computer. Based on the pulse condition analysis of the traditional Chinese medical science, the description dimension, time dimension and range dimension of the pulse condition are determined, and the pulse condition information is accurately obtained through an adaptive sensor structure and parameters.

The invention discloses a full automatic inner retrospective CT respiratory gating system. The procedures for using the system include automatic positioning of interested regions for respiratory gating signal extraction, respiratory gating signal acquisition and processing, and synchronization and selection of projection images and respiratory waveform. The system is capable of implementing inner retrospective respiratory gating on the basis of an existing small animal micro computed tomographic imaging system, the motion artifact introduced by respiratory during CT scanning for small animals can be reduced, and the image spatial resolution is improved significantly; meanwhile, additional hardware added to an existing CT system is omitted, hardware complexity is lowered, the entire cost of equipment is reduced, and economic cost is saved.

In various embodiments, the present application discloses systems and methods for magnetic resonance imaging (MRI) of coronary arteries. In various embodiments, the invention allows for motion corrected, simultaneously acquired multiple contrast weighted images with whole-heart coverage and isotropic high resolution. In some embodiments, the invention teaches using interleaved preparatory pulses, a 3D radial golden angle trajectory and 100% respiratory gating efficiency.

The application relates to a magnetic resonance image reconstruction method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring a magnetic resonance signal, and obtaining K space data according to the magnetic resonance signal; distributing the K space data to one or multiple time phase, and computing the time resolution of each time phase and the data line number of each time phase of the K space data; adjusting the time phase of the K space data according to the time resolution of each time phase and the data line number of each time phase; and performing image reconstruction to obtain a medical image. The time phase of the K space data is adjusted through the time resolution of each time phase, so that the time phase can be properly adjusted for the opportunity of entering the organ by the contrast medium. The condition that the continuous sampling condition is damaged due to respiratory gating technology can be reduced as much aspossible through the data line number of each time phase.

The invention discloses a respiratory gating training device, which comprises an abdomen bandage, a data acquisition module and a display module. A cavity is formed in the abdomen bandage, and the cavity can switch between a systolic state and a diastolic state; the data acquisition module communicates with the cavity of the abdomen bandage, and the data acquisition module is capable of generating pneumatic data in accordance with a switching process of the cavity between the systolic state and the diastolic state an drawing an oscillogram in accordance with the pneumatic data and/or generating a respiratory gating signal; and the display module is used for receiving the pneumatic data which is acquired by the data acquisition module and the oscillogram which is drawn by the data acquisition module and for displaying the pneumatic data and the oscillogram. The training device disclosed by the invention is capable of effectively training the precision of breathing movement; and the training device is low in overall cost, small in overall size, light in weight, convenient to carry and easy for using.

The invention discloses a living body CT scanning control method based on segmented speed regulation. The same tested object is scanned twice, so that twice of scanning obtain complementary respiratory phases at the corresponding positions of a tomography device, and accordingly a reconstructed image with respiratory artifacts removed is obtained through projection image screening. In order to make the respiratory phases sampled twice to be complementary at the same angle and take the situation that respiratory of the tested object changes into consideration, each time of scanning is divided into multiple sections, and a motion cycle obtained through calculation of the last section and the current phase are is used for controlling start time and rotation speed of scanning of the later section. Compared with existing retrospective respiratory gating, the limitation that multiple circles of scanning are needed is eliminated, scanning time is greatly shortened, and radiation dose of the tested object are greatly reduced; meanwhile, by means of the design of segmented scanning and variable-speed rotation, dynamics and self-adaptation of a CT scanning system are improved.

The invention discloses a neonatal DR respiration synchronous exposure control processing method and device thereof. The method comprises the following steps: respiratory signal acquisition; respiratory signal processing and analysis; establishment of a respiratory gating signal; DR system gated the synchronous exposure control. The device comprises a respiratory signal acquisition device, a respiratory signal processing and analyzing module, a respiratory gating signal establishing module and a DR system gating synchronous exposure control module. The newborn cannot control breathing to workwith the doctors' instruction, and breathing can affect chest X-ray imaging. The Neonatal DR respiration synchronous exposure control processing method and device adopts a neonatal DR respiration synchronous exposure control processing method, and the respiration gating is designed according to the respiration signal by collecting the neonatal respiration signal to control the DR exposure synchronization mechanism. The Neonatal DR respiration synchronous exposure control processing method and device have the advantages that the DR image of the respiratory end of the newborn can be acquired, the exposure shooting result is improved, the waste film rate of the clinical X-ray photography of the newborn is reduced, the repeated photography is reduced, the radiation dose of the newborn is reduced, and better quality for neonatal chest photography is assured.

The invention provides a determining method and device of a gate control signal. The determining method comprises the steps that projection data obtained in each sub-period of the detecting time through positron emission computed tomography (PET) scanning are collected, and the projection data include TOF information; according to the projection data including the TOF information, annihilation point position information is determined, and the annihilation point position information is used for representing three-dimensional space coordinates of an annihilation point; according to the annihilation point position information, annihilation point gravity center positions corresponding to all the sub-periods are determined; and according to the annihilation point gravity center positions corresponding to all the sub-periods, the gate control signal is obtained. According to the determining method and device of the gate control signal, externally-arranged respiratory gating equipment can benot used any longer, and the gate control signal can be obtained directly by processing the projection data, so that the cost is saved.

The invention provides an SPECT and PET image correction method and device and electronic equipment, relates to the technical field of image processing, and can solve the technical problem that the accuracy of SPECT and PET images is relatively low due to blurring caused by the breathing movement in the generation process of the SPECT and PET images. The method comprises the specific steps that CTdata at the end of expiration and CT data at the end of inspiration are acquired through an active respiratory control method; according to the CT data at the end of expiration and the CT data at theend of inspiration, several pieces of interpolation CT data are obtained; the several pieces of interpolation CT data are utilized to perform attenuation correction on respiratory gating SPECT and PET images.

The invention discloses a puncture assisting guide support. A support body comprises a support seat and a mounting frame, a slide rail is arranged on the support seat, a sliding seat is mounted on theslide rail in a sliding manner, the mounting frame is mounted on the sliding seat, a positioning mechanism is mounted at one end, away from the sliding seat, of the mounting frame, and a puncture guide part is arranged on the positioning mechanism. By optimized design of the puncture assisting guide support and guide of needle enter direction of puncture by the positioning mechanism, the punctureaccuracy and stability are improved, meanwhile, the positioning mechanism is mounted on the support seat through the mounting frame in a sliding manner, the relative position of the positioning mechanism slides in a reciprocating manner with respiration of a patient to realize self-sliding position adjustment of the puncture needle with respiration of the patient and play a respiratory gating role, the positioning mechanism cannot cause traction to free respiration of the patient, and meanwhile, secondary injury caused by the respiratory puncture needle to organs is avoided in the puncture process.

The present disclosure relates to a method for generating a respiration gating signal of an X-ray micro-computed tomography scanner. The respiration cycle of repeating inhalation and exhalation of an experimental animal is acquired by imaging the abdomen or chest of the experimental animal respiring under anesthesia fixed on a couch disposed between an X-ray irradiator and an X-ray detector fixed to a rating gantry, and then a respiration gating signal that is synchronized at the point of time when the respiration is judged to stop.

The invention relates to the technical field of computed tomography systems and discloses a CT system with CT respiratory gating. The CT system comprises a bed body, a CT gantry, a sensor terminal, a loading unit and a detection probe for inner ear pressure. The signal output end of the detection probe for inner ear pressure is connected to the input end of the CT gantry. The advanced ear pressure measuring mode is adopted for reflecting respiratory motion and chest motion and combined with CT chest examination to guide control over scanning time and a scanning position. While the CT system plays an effective role in respiratory gating, influences on a patient and image quality are reduced, and the CT system not only is convenient to operate, but also reduces the uncomfortable degree of the examined patient and meanwhile guarantees detection accuracy.

A respiratory gating phantom device includes a first airbag, a second airbag, a first catheter, a second catheter, a fixture, and an air pressure gating device. The first catheter and the second catheter are respectively installed in the first airbag and the second airbag. The fixture is provided with a phantom tumor and adjustably installed in the first catheter or the second catheter, thereby installing the phantom tumor in the first catheter or the second catheter. The air pressure gating device, connected to the first airbag and the second airbag, inflates and deflates the first airbag and the second airbag to simulate breathing. The first catheter and the second catheter respectively move along three-dimensional direction and two-dimensional direction in response to motions of the first airbag and the second airbag.

The invention discloses a high-power high-intensity focused ultrasound driving system based on STM32F334. The high-power high-intensity focused ultrasound driving system is composed of an ARM controlunit, a UI control unit, a digital power supply unit, a radio frequency driving unit, a fan control unit and a respiratory gating unit, all the units are controlled and coordinated by a same chip of STM32F334. Compared with a classic MCU plus FPGA control scheme, the high-power high-intensity focused ultrasound driving system is high in integration and good in reliability, high-precision timer resources in the STM32F334 chip is fully used, frequency division can be carried out downwards from 4.608GHz, the highest resolution can reach 217ps, and the precision of PWM driving signals of a phase shift full bridge of the digital power supply unit and an H bridge of the radio frequency driving unit is ensured; and meanwhile, the respiratory gating unit uses high-speed ADC in the STM32F334 chip to collect respiratory signals, and during the treatment process, the synchronization between the radio frequency driving unit and the respiratory gating unit is further improved.