21 results about "Free breathing" patented technology

The application discloses an old person free breathing coronary artery scanning image lesion analysis system and relates to the technical field of scanning image lesion analysis. In order to solve the problem that the accurate condition of a patient cannot be obtained according to a scanning image. The application adopts a diameter method, an area method and a contrast agent filling condition to judge the stenosis degree and the hemodynamic change, analyzes the lesion from the morphological and functional double angles, provides comprehensive information for clinical decision-making, identifies the R wave peak value and divides the cardiac phase, matches the respiratory signal and the projection data in time, can accurately capture the characteristics of the heart in different motion states and the respiratory stage, effectively avoids the interference of the artifacts caused by the heart beat and the respiratory motion, makes the reconstructed image clearer and more accurate, sets the CT and the injector parameters in sequence from the scanning type confirmation, each link is closely related and the target is clear, improves the work efficiency, and is convenient for quality control and process management.

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 provides a CT imaging control method and a CT imaging control system, and relates to the technical field of medical imaging. By introducing the double X-ray sources and the two flat panel detectors and combining with the 3D optical camera to obtain breathing signals of a patient, CT imaging of the patient in a free breathing state is achieved. In the scanning process, based on real-time breathing signals, the two X-ray sources are triggered in sequence at different rotation angles for exposure, and the double-angle projection data obtained by the corresponding flat panel detectors are read. And reconstructing an organ mask image sequence from the double-angle projection data by using a pre-trained deep neural network, further analyzing the sequence to quantify the amplitude and phase of respiratory movement, distributing respiratory phase values for the projection data with different rotation angles, and classifying the respiratory phase values as gating data frames. And performing image reconstruction on each gating data frame to obtain four-dimensional CT images of different breathing phases. The problem of motion artifacts of the CT image in the free breathing state is solved, so that the image quality and the diagnosis accuracy are improved.

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.

This utility model provides a free-breathing device for a bearing housing of an induced draft fan, relating to the field of induced draft fans. The device includes an induced draft fan and a bearing housing disposed inside the fan. A first breathing valve is provided at one end of the bearing housing. The exhaust end of the first breathing valve is connected to and passes through a connecting pipe. The connecting pipe passes through the induced draft fan and extends to the outside of the fan. The end of the connecting pipe away from the first breathing valve is connected to and passes through a storage unit for storing the fumes generated in the bearing housing. This free-breathing device for the bearing housing, by adding a first breathing valve and a connecting pipe to the bearing housing, allows fumes generated inside the bearing housing to be guided to the outside of the induced draft fan through the connecting pipe. The fumes are then post-treated by the external storage unit, thereby preventing fumes from accumulating inside the induced draft fan and reducing the risk of combustion of fumes inside the fan.

The invention discloses a PET / CT (positron emission tomography / computed tomography) respiratory movement compensation method based on Sim3 free scaling group convolution. The method comprises the following steps: firstly, performing SUV conversion, intensity normalization, isotropic resampling and lung region cutting on a fixed image and a moving image to establish a consistent input space; and then, constructing a free scaling convolution kernel acting on the Sim3 group, and simultaneously expressing scale change, rotation attitude and local displacement under a unified framework, so as to extract multi-scale features with equivariant characteristics for respiratory movement. According to the method, image similarity, scale stability constraint and SUV quantitative deviation suppression items are introduced in loss design, and system errors of functional parameters are reduced while the model is guided to be aligned in structure. The method does not need additional hardware gating, can be suitable for free breathing PET / CT, gating PET / CT and breathing motion compensation of a dynamic PET sequence, and has application value for chest tumor quantitative evaluation and mediastinal focus boundary recognition.

The utility model relates to the technical field of nursing, in particular to a protection device for preventing a non-invasive ventilator from causing mechanical pressure injury to a nose, which comprises a base body, and a bonding layer, a buffer layer and a clamping layer which are arranged on the base body. Compared with the prior art, the protective device has the advantages that the through holes in the base body ensure that the mouth and the nose of a patient can breathe freely, the bonding layer ensures that the protective device can be tightly attached to the face of the patient, the placing stability is improved, and the air holes in the buffer layer are beneficial to keeping the skin dry and comfortable. The clamping layer is made of flexible materials, the comfort degree of the device is increased, meanwhile, the breathing mask can be clamped more stably and is not prone to sliding off, due to the design of the arc-shaped groove and the water absorption layer on the clamping layer, the stability of the breathing mask is improved, moisture generated by breathing can be absorbed, and the breathing effect is improved. And the interior of the mask is kept dry and comfortable.

The invention discloses a path planning method for a puncture robot in a lung free breathing state, which comprises the following steps: firstly, analyzing the interaction force between a flexible needle and multi-layer soft tissues of a human body in different puncture stages, and establishing a kinematics model for interaction between the flexible needle and the multi-layer soft tissues by introducing a single-wheel vehicle model; then, a needle point position prediction model is built based on the nonlinear rod model, and the actual deflection posture of the flexible needle in the body is calculated in real time through force and torque parameters obtained by a force sensor at the tail end of the puncture mechanical arm. According to the method, a curve path generated by a flexible needle and a tissue interaction model is used for replacing a linear path in a traditional rapid search tree algorithm, and meanwhile, dynamic position changes of a target spot and an obstacle in a free breathing state are considered, so that dynamic obstacle avoidance is realized, and the puncture precision of a robot is improved. And finally, a lung puncture robot experiment platform in a free breathing state is constructed, and high-precision and high-efficiency puncture robot path planning can be realized in a free breathing environment.

Embodiments of the present application disclose a kind of vascular reactivity evaluation method, device, electronic equipment and storage medium, wherein the method comprises: obtaining the first magnetic susceptibility weighted imaging of brain region of target object in free breathing state and the second magnetic susceptibility weighted imaging in breath-holding state;Determine the vascular distribution map of brain region;According to the first magnetic susceptibility weighted imaging and vascular distribution map, determine the first oxygen uptake fraction of target blood vessel in free breathing state;According to the second magnetic susceptibility weighted imaging and vascular distribution map, determine the second oxygen uptake fraction of target blood vessel in breath-holding state;According to the first oxygen uptake fraction and the second oxygen uptake fraction of target blood vessel, determine the evaluation index of vascular reactivity of target blood vessel, and evaluate the vascular reactivity of target blood vessel based on evaluation index.It can achieve the effect of simply, quickly and accurately evaluating vascular reactivity through oxygen uptake fraction in free breathing state and breath-holding state.

The embodiment of the invention discloses a liver elasticity detection method and device in magnetic resonance imaging and a magnetic resonance imaging system. The method comprises the steps that a single MR sequence is adopted to conduct multiple times of scanning on a coronal plane of the liver, MR images of multiple phases of the liver are obtained, the total scanning duration of the multiple times of scanning is larger than one complete respiratory movement duration, and the coronal plane is the coronal plane containing the maximum contour of the liver; wherein in the whole scanning period, respiration of the user corresponding to the liver is free respiration; according to the MR images of the multiple phases of the liver, displacement of the liver in the head and foot direction in the whole scanning process is determined, and the change value of the size of the liver in the head and foot direction or the left-right direction in the whole scanning process is determined; according to the displacement of the liver in the head and foot direction in the whole scanning process and the change value of the size of the liver in the head and foot direction or the left-right direction in the whole scanning process, the elasticity coefficient of the liver is determined. According to the embodiment of the invention, the accuracy of liver elasticity detection is improved.

The invention discloses a breathing free hemostasis orthopedic nasal ventilation tube, and relates to the technical field of nasal ventilation tubes, the breathing free hemostasis orthopedic nasal ventilation tube comprises a nasal ventilation tube main body, and the outer side walls of the top and the bottom of the nasal ventilation tube main body are each provided with an inflation assembly; the inflation assembly comprises a first air bag and a second air bag. The first air bag is installed on the outer side of the bottom of the nasal ventilation tube body and used for pressing swollen mucosa or hemorrhagic spots or bent nasal septum in the outer side area of the nasal cavity, achieving hemostasis and correction and assisting in unobstructing the nasal cavity. The second air bag is installed on the outer side of the top of the nasal ventilation tube body. After proper medicine is smeared or sprayed on the surfaces of the nasal ventilation tube main body, the first air bag and the second air bag, the nasal ventilation tube is slowly inserted into the nasal cavity of a patient; the second air bag located at the top of the nasal cavity is inflated to be expanded so as to fix the position of the nasal ventilation tube and prevent mucus from flowing back; and then the first air bag located at the bottom of the nasal cavity is inflated, so that the first air bag compresses the swollen mucous membrane or the bleeding point or the bent nasal septum in the outer side area of the nasal cavity, and hemostasis and correction are achieved.

A mouthpiece device and method for helping human users with congested sinuses breathe freely through their mouths while sleeping while minimizing the risks of dry mouth and drooling. The device fits between the user's jaws and is configured to apply a gentle jaw and lip opening pressure sufficient to at least partially open a sleeping user's jaw and lips while the jaw and lip muscles are relaxed. At the same time, the device is configured to so that when the user, while still sleeping, activates their jaw or lip muscles to swallow, this action overcomes the gentle opening force, allowing the user to easily swallow without conscious effort. Methods of configuring the device shape and opening forces are also taught. These include using implanted sensors, processors, and actuators configured to optimize the opening forces according to user physiology; and / or wireless connection to external sensing and control devices.

This application relates to a head fixation support device for prone positioning, comprising: a height-adjustable support frame, one end of which is connected to a support plate, the support plate having a through groove; a head support member, mounted on the support plate, the head support member having a ventilation groove facing the through groove, a tube insertion groove on the head support member communicating with the ventilation groove, and a neck placement area with a tube insertion rope fixed thereto. The height-adjustable support frame allows adjustment of the final support height of the support plate. The head support member, mounted on the support plate, allows for patient head placement. When the patient's face is supported on the head support member, the face can breathe freely through the through groove and ventilation groove. The ventilator tubing is passed through the tube insertion groove and then inserted into the patient's mouth, and the endotracheal tube is connected to the patient via the tube insertion rope. This solves the problem in related technologies where ventilation stents are inconvenient for ventilator tubing and endotracheal tubes to pass through, thus limiting the use of the stent.

The application provides a motion self-correcting kidney chemical exchange saturation transfer imaging method and system, belongs to the CEST imaging technical field, and the imaging method comprises the following steps: collecting an original image, dividing a respiratory state, reconstructing an image, image registration and fusion, data post-processing and signal quantification, and the imaging system comprises various modules for realizing the imaging method; through CEST sequence design of 112.5° radial sampling, k-space reading of fast field echo (TFE) is utilized, the signal of 0.1-0.5 Hz at the center of k-line is extracted as a respiratory signal, the respiratory state is divided by using the respiratory signal and k-space data is split, the images corresponding to different respiratory states are reconstructed, finally, the final CEST-MRI image is obtained through image registration and average fusion of the images of different respiratory states, the signal-to-noise ratio, saturation efficiency and signal accuracy are ensured, and the problem that the respiratory motion influences CEST signal quantification when chemical exchange saturation transfer imaging (CEST-MRI) of the kidney is performed under free breathing is solved.

The utility model relates to the technical field of pet supplies, and discloses an anti-struggling pet chest strap which comprises an anti-struggling mechanism and a traction mechanism arranged above the anti-struggling mechanism, the anti-struggling mechanism comprises a breathable neck elastic sleeve, and a first zipper used for opening and closing is arranged on the breathable neck elastic sleeve. The breathable neck elastic sleeve is combined with the first zipper, tightly attached to the neck of the pet, stretched along with the action of the pet and matched with the connecting band to prevent the head from struggling off, the first staylace and the second staylace are flexibly adjusted according to the size of the abdomen through the male buckle and the female buckle, the struggling force of the abdomen is effectively restrained, the foot sleeve band, the foot sleeve ring and the second zipper restrain the action of the legs, and all-directional falling prevention is achieved. During wearing, due to the breathable neck design and the adjusting function of the first staylace and the second staylace, free breathing of the neck and comfort of the belly of the pet are ensured, during use, wearing and taking-off are convenient due to the double zippers, all the parts are stably installed and easy to operate, and an efficient and practical auxiliary tool for pet walking is provided for a pet owner.

The application discloses a free breathing fast three-dimensional heart magnetic resonance imaging method and system, and belongs to the three-dimensional imaging field, and comprises the following steps: acquiring undersampled K-space data of a heart under different breathing states; constructing a motion solving network and an image reconstruction network based on implicit neural representation; according to the sampling K-space data under different breathing states, the motion solving network and the image reconstruction network are iteratively updated and iteratively reconstructed through a loss function comprising a motion compensation data fidelity term, a motion field smoothness term, an image smoothness term and an image edge sharpness term, so as to obtain a breathing motion field estimation result and a heart nuclear magnetic resonance motion compensation reconstruction image; by means of implicit neural representation, the breathing motion field and the three-dimensional heart magnetic resonance image are directly reconstructed from the undersampled K-space data, and in combination with various regular term constraints, the imaging time is reduced, the image signal-to-noise ratio is improved, the image reconstruction quality can be guaranteed, and no additional training data is needed.

The invention discloses an integrated pipeless respirator based on a coreless brushless axial flow fan, and relates to the technical field of respirators.The integrated pipeless respirator comprises a mask body, an adjusting device is arranged at the top of the mask body, an airflow channel is fixedly connected to the mask body, an air inlet of the airflow channel is communicated with the outside, and an air outlet of the airflow channel is communicated with the inside of the mask body; an air outlet hole of the air flow channel is fixedly connected with the mask body, the air flow channel and the mask body are integrally formed, the air flow channel is divided into an axial flow air channel and a ventilation channel through an interlayer, a hollow cup brushless axial flow fan is arranged in the axial flow air channel, and an air leakage hole is formed in the ventilation channel. The problems that a traditional breathing machine is large in size, high in noise, high in pipeline dependence and the like are solved, integration of the draught fan and the breathing mask is achieved, and the portability and the use comfort of equipment are remarkably improved.

A dynamic pulmonary magnetic resonance imaging method, including: with an ultrashort echo time sequence, acquiring pulmonary magnetic resonance signals in a free-breathing condition; during data acquisition, monitoring a respiratory condition, obtaining a respiration curve; with the respiration curve, performing motion-resolved reconstruction on the acquired pulmonary magnetic resonance data, obtaining motion-resolved lung images; performing motion field estimation on the motion-resolved lung images; performing motion-state weighted motion-compensated reconstruction on results of the motion field estimation, obtaining dynamic pulmonary magnetic resonance images; performing ventilation map estimation on the dynamic pulmonary magnetic resonance images, obtaining a pulmonary ventilation.

The invention discloses a lung puncture robot digital twinning system facing a free breathing state. The system belongs to the technical field of digital twinning and is composed of a physical space, a digital space and a virtual-real synchronization module. The physical space is composed of a cooperative mechanical arm, a six-dimensional force sensor, a flexible puncture needle, a human lung respiration model and a vision measurement module; the vision measurement module is composed of a body surface marker, a vision camera and a vision algorithm. The digital space is a mapping model of the physical platform in the virtual environment. And the virtual-real synchronization module is used for realizing data interaction and state synchronization between the physical space and the digital space. According to the method, virtual and real synchronization of the robot puncture process can be achieved in the free breathing state of the human body, real-time monitoring, prediction and online compensation control are conducted on the dynamic positions of the lung target spot and the puncture needle, and therefore the puncture positioning error is controlled within the range of + / -2 mm, and the precision and safety of lung puncture under the free breathing condition are remarkably improved.