105 results about "Free breathing" patented technology

A method for four-dimensional (4D) image verification in respiratory gated radiation therapy, includes: acquiring 4D computed tomography (CT) images, each of the 4D CT images representing a breathing phase of a patient and tagged with a corresponding time point of a first surrogate signal; acquiring fluoroscopic images of the patient under free breathing, each of the fluoroscopic images tagged with a corresponding time point of a second surrogate signal; generating digitally reconstructed radiographs (DRRs) for each breathing phase represented by the 4D CT images; generating a similarity matrix to assess a degree of resemblance in a region of interest between the DRRs and the fluoroscopic images; computing a compounded similarity matrix by averaging values of the similarity matrix across different time points of the breathing phase during a breathing period of the patient; determining an optimal time point synchronization between the DRRs and the fluoroscopic images by using the compounded similarity matrix; and acquiring a third surrogate signal and turning a treatment beam on or off according to the optimal time point synchronization.

Respiratory support and / or controlled mechanical ventilation of a patient are provided. A ventilation apparatus may include a ventilator, a transtracheal prosthesis, and a respiratory relief device. The transtracheal prostheses and ventilation catheter may be arranged such that the patient can breathe freely through the upper airway and / or the tracheal prostheses. Respiratory sensors may measure a breathing rate, lung pressure, airway pressure, or a combination thereof. Pulses of gas may be provided to the patient through the ventilation catheter during inspiration. The pulses may have a first volume while the patient breathes normal and a second volume when the sensors detect a cessation of breathing or reduction in breathing volume. The second volume may be provided at 1-5 times the normal breathing rate, with a volume 25-500% times the first volume, or both.

The invention is relative to a method and an apparatus for supporting the respiration of a patient and to a tracheal prosthesis. According to the invention the spontaneous respiration of a patient is detected by sensors and at the end of an inhalation procedure an additional amount of oxygen is administered to the lungs via a jet gas current. This improves the absorption of oxygen during inhalation. If required, the exhalation procedure of the patient can be arrested or slowed by a countercurrent in order to avoid a collapse of the respiration paths in this manner. This procedure is realized by an apparatus comprising an oxygen pump that can be connected to an oxygen source and comprising a tracheal prosthesis that can be connected via a catheter. The spontaneous respiration of the patient is detected by sensors connected to a control unit for activating the oxygen pump. The tracheal prosthesis comprises a tubular support body with a connection for the catheter and two of the sensors are associated with the support body. The tracheal prosthesis and the jet catheter that is integrated or can be introduced are dimensioned so that the patient can freely breath and speak without restriction.

A system and method of free-breathing MR imaging saturates an entire navigator profile at the end of an imaging segment of physiological motion cycle, e.g., heart cycle, thereby providing a uniform recovery of longitudinal magnetization for the next imaging cycle. Through use of at least one dephaser gradient following the image acquisition segment and a navigator RF saturation pulse, residual transverse magnetization is dephased and spins within a navigator tracker are saturated to ensure a uniform recovery of longitudinal magnetization for the next imaging period.

Tubular elements inserted for enhanced breathing into the nasal passages of a wearer to increase air flow include a bridge coupling between the elements of a spring-like rigidity to spread the elements towards their quiescent obtuse angle spread before insertion, supplemented by the stretching action afforded by a strap wrapped from opposing outside surfaces of the tubular elements around the wearer's head for added securement in an adjustable fit.

A method for four-dimensional (4D) image verification in respiratory gated radiation therapy, includes: acquiring 4D computed tomography (CT) images, each of the 4D CT images representing a breathing phase of a patient and tagged with a corresponding time point of a first surrogate signal; acquiring fluoroscopic images of the patient under free breathing, each of the fluoroscopic images tagged with a corresponding time point of a second surrogate signal; generating digitally reconstructed radiographs (DRRs) for each breathing phase represented by the 4D CT images; generating a similarity matrix to assess a degree of resemblance in a region of interest between the DRRs and the fluoroscopic images; computing a compounded similarity matrix by averaging values of the similarity matrix across different time points of the breathing phase during a breathing period of the patient; determining an optimal time point synchronization between the DRRs and the fluoroscopic images by using the compounded similarity matrix; and acquiring a third surrogate signal and turning a treatment beam on or off according to the optimal time point synchronization.

A 5-dimensional imaging method and system is provided to acquire and display the effect of dynamic physiologic changes (either spontaneous or induced) on cardiac function of a patient's heart to elucidate their effects on diastolic myocardial function. In a patient free-breathing magnetic resonance imaging study, 3-dimensional spatial information is encoded by a non-Cartesian 3-dimensional k-space readout trajectory and acquired concurrently with recordings of cardiac and respiratory cycles. The advantage of using non-Cartesian sampling in this invention compared to, for example, Cartesian sampling is higher scan acceleration, improved robustness to motion / flow effects (incoherent instead of coherent artifacts) and robustness to missing data points in k-space.

A continuous positive airway pressure (CPAP) system provides positive airway pressure therapy. It has been recognized that users generally prefer to breathe freely rather than to fight the pressurized air when possible. A continuous positive airway pressure (CPAP) system provides positive airway pressure therapy when required, but allows the user to breathe freely with the mask on when positive airway pressure is not required. The system has a valve that moves between two positions to open and close the unassisted breathing vent and the outlet from the flow generator.

The invention relates to a water soluble preservative film for fruits and vegetables and a preparation method of the preservative film. The water soluble preservative film for the fruits and vegetables is mainly prepared by the following materials in percentage in weight: 50 to 80% of polyvinyl alcohol with alcoholysis degree of less than 90%; 10 to 30% of polyhydroxy plasticizer, 1 to 5% of auxiliary film forming agent, 3 to 8% of low temperature antifreeze agent, 3 to 10% of adsorbent filling agent and 0.3 to 2% of film-forming adding additive. The preparation method comprises the following two steps of: 1, after metering contents of components of the preservative film in the formula, obtaining a uniform aqueous solution with concentration of 15 to 25% in water; and 2, uniformly casting the prepared solution on a clear steel band, and drying the solution to obtain the film through a dried drying tunnel with temperature of 120 to 180 DEG C. The preservative film has a high barrier property against oxygen, carbon dioxide and nitrogen and the like, and has a high bidirectional permeable exchange capacity for steam, thereby guaranteeing free breathing and water exchange of the fruits and vegetables in a preserving process.

A system and method are disclosed to acquire high temporal resolution free-breathing cardiac MR images. The technique includes monitoring heart rate of a patient just prior to image acquisition to acquire a time period of an R—R interval, and using this time period from the heart rate monitoring to prospectively estimate future R—R intervals. The acquisition of MR data can then commence at any point in an R—R interval and extend for the time period recorded. The data acquisition can be segmented and acquired in successive R—R intervals, then combined to create high temporal resolution images.

In order to make it possible to set the optimal breath-holding imaging conditions according to the subject without extension of an imaging time or the sacrifice of image quality, one scan is divided into one or more breath-holding measurements and free-breathing measurements on the basis of the imaging conditions of a breath-holding measurement, which are input and set according to the subject, and a region of the k space measured in the breath-holding measurement is controlled. Preferably, in the breath-holding measurement, low-frequency data of the k space is measured. Moreover, preferably, imaging conditions of the breath-holding measurement include the number of times of breath holding or a breath-holding time, and the operator can set any of these values.

A method and system for retrospective image combination for free-breathing magnetic resonance (MR) images is disclose. A free-breathing cardiac MR image acquisition including a plurality of frames is received. A key frame is selected of the plurality of frames. A deformation field for each frame to register each frame with the key frame. A weight is determined for each pixel in each frame based on the deformation field for each frame under a minimum total deformation constraint. A combination image is then generated as a weighted average of the frames using the weight determined for each pixel in each frame.

The invention discloses a respiratory motion compensation method for lung percutaneous puncture. The method comprises the following steps: constructing a four-dimensional visualization model by usingpre-operative 4DCT images; extracting a respiratory movement trajectory, selecting a target point and a skin insertion point based on the four-dimensional visualization model and respiratory movementtrajectory, forming a puncture path, and determining an initial position, direction and puncture depth of a puncture needle; and during intraoperative puncture needle insertion, acquiring respiratorysignals of a patient in real time by a respiratory monitoring device, inputting the respiratory signals into a control system of a puncture robot, and analyzing characteristic parameters of the respiratory signals by the control system to guide the puncture robot to iteratively adjust the needle insertion speed to ensure that a needle tip reaches the target point at a specified time, so as to compensate for tumor displacement caused by breathing. The method provided by the invention allows puncture to be performed in a state of free breathing, has a wider application range, and helps to reducepain of the patient and improve the success rate of surgery.

The invention provides a method, a system and a device for making and implementing a personalized deep-breathing exercise prescription. The method comprises the following steps: defining the personalized deep-breathing exercise prescription; guiding a testee to be subjected to a cardiopulmonary harmony test: guiding the testee to respectively carry out free breathing and breathing guiding when thetestee is in a resting state, and calculating cardiopulmonary harmony series indexes according to synchronously measured electrocardiosignals and breathing signals; making a personalized deep-breathing exercise prescription according to the cardiopulmonary harmony test result of the testee: selecting the optimal guide breath frequency of the cardiopulmonary harmony series index of the testee as abreath frequency parameter of breath exercise, and taking values corresponding to other parameters in the personalized deep-breathing exercise prescription as default values; and guiding the testee to perform breathing exercise according to the personalized deep breathing exercise prescription. The cardiopulmonary harmony state of a testee is evaluated by taking cardiopulmonary harmony series indexes as key indexes, and a personalized deep-breathing exercise prescription is formulated according to the cardiopulmonary harmony state.

The invention relates to an air-permissible sole material and a method for preparing air-permissible soles by the material, relating to a sole material and a method for preparing the soles by the material. The invention provides an air-permissible and water-proof sole material and a method for preparing the air-permissible soles which have good ventilation property and good wear-resistance, twist-resistance and anti-slipping functions. The composition of the sole material is rubber, 1, 2-polybutadiene, polystyrene, a lubricant and filler. The rubber, the 1, 2-polybutadiene, the polystyrene, the lubricant and the filler are mixed and put into an internal mixer for internal mixing; then, the internally mixed mixture is put into a granulator for granulation; and finally, the granules of the mixture are injected into sole moulds for injection molding by an injection molding machine. The sole material can provide passages and media necessary for ventilation; when falling on the ground, the pressure can cause vapor in shoe cavities to flow to the outside; when leaving the ground, the negative pressure causes the outside air to flow into the shoe cavities, therefore, the free-breathing of feet is realized and the soles have good wear-resistance, twist-resistance and anti-slipping performance.

The invention discloses a reestablishing method of a 4D-CT different time phase sequence image. The reestablishing method comprises the following steps: establishing an edge-protected multi-scale space, conducting multi-scale decomposition on a 3D-CT image on a therapeutic day under a free breathing state, determining an optimal time phase based on a maximal similarity measurement criterion, utilizing a free deformation model based on a spline B to realize deformation rectification of a 4D-CT different time phase image on a planned day, and reestablishing the 4D-CT image based on the 4D-CT image on the planned day and the 3D-CT image on the therapeutic day. The reestablishing method of the 4D-CT different time phase sequence image, disclosed by the invention, has the benefits that the 4D-CT image on the therapeutic day can be reestablished based on the 4D-CT image on the planned day and the 3D-CT image on the therapeutic day, so as to acquire the motion change law of tumor and endangered organ of a patient on the therapeutic day, and effectively avoid the damage to the body as the patient receives plenty of X-ray radiation again.

A spinal-length mattress including a means for providing buoyancy to a human torso and abdomen thereon; attached to the mattress at one end, a pelvic support portion; and attached to the mattress at an opposite end, a head rotation stabilization portion having an air passage opening allowing a person to breathe freely when resting in a face down position thereon. By supporting the pelvis and stabilizing the head to substantially limit motions of the neck, a central cushion (preferably dominated by a “shape memory foam” filling) allows the spinal column to passively distribute all directional stresses—including those deriving from body mass and from muscle tension. Thus relieved of stress, disks between spinal bones begin to return to their respective naturally compliant symmetrical shapes; thereby generally providing a long term benefit in exchange for a quarter hour or a half hour of regular prone-oriented engagement with the mattress.

A method and system for magnetic resonance imaging comprises applying at least one radiofrequency magnetization transfer (MT) pulse to a coronary venous region of a subject positioned within a magnetic field, and acquiring magnetic resonance imaging data from the coronary venous region to produce an image of a coronary venous structure. This technique can be utilized as part of a 3D free-breathing, ECG-triggered gradient-echo Cartesian acquisition of the coronary region. One or more magnetization transfer (MT) preparation pulses are used to enhance the contrast between venous blood and myocardium. The MT preparation results in myocardial signal suppression without any significant signal loss in the arterial or venous blood so as to maintain venous blood signal-to-noise ratio while improving contrast between myocardium and veins. The coronary venous structure can comprise one or more of a coronary sinus, a lateral vein and a posterior vein. The image of a coronary venous structure can be acquired in connection with an interventional cardiovascular procedure, such as a cardiac resynchronization therapy.

In the acquisition of magnetic resonance imaging or spectroscopic data, 2D PACE is employed to identify an acceptance window within which the magnetic resonance data are acquired, and to trigger the acquisition of the magnetic resonance data at the same position of the patient's diaphragm in each respiratory cycle. The patient is thereby allowed to freely breath during the data acquisition procedure, but the acquisition of the magnetic resonance data is always able to take place with the patient's diaphragm in the same physical position in each respiratory cycle.

A system and method for delaying the start of the continuous positive air pressure therein making it easier for a user to fall asleep. The system delivers pressurized gas to the airway of a patient. The system has a gas flow generator for providing a flow of gas and a mask for delivery of gas flow to an airway of a patient. The mask has an exhaust port being continuously open and having suitable flow resistance for maintaining a pressure in the cavity. The mask has a breathing port adaptable to open when no flow of pressurized air for allowing free breathing by the user. A hose extends between the gas flow generator and the mask for providing a flow of gas. The system has a mechanism for turning the flow of gas on at a time distinct from turning on the apparatus.

The invention relates to a free breathing intelligent integrated ceiling system comprising a keel and a buckling plate buckled under the keel, wherein the buckling plate also at least comprises a grid panel with a shape of the buckling plate and an aluminum profile panel in a shape of the buckling plate; the grid panel is matched with a ventilator; the surface of the aluminum profile panel is provided with a ventilating groove; the grid panel is fixedly provided with a display circuit fixing box with a digital code indicating plate; a Figaro Japan 2600 integrated air sensor and a temperature and humidity sensor are fixed on the digital code indicating plate; the grid panel is connected with a power plate of a driving box on a device by a connecting cord; and the back of the aluminum profile panel is fixedly provided with at least one layer of scale aluminum mesh relative to the ventilating groove. The invention has the advantages of simple structure, convenient use, high intelligent degree, wide application range and the like.

A method for acquiring image data from a subject during a scan with a Magnetic Resonance Imaging (MRI) system comprising the steps of acquiring a reference data set of a region of interest, acquiring a plurality of free-breathing data sets, and, selectively processing the plurality of free-breathing data sets in comparison with the reference data set to be used in creating an image of the region of interest. The reference data set comprises breath-held data set or, alternatively, free-breathing data.

Systems and methods for producing motion-corrected MR images that include an MRI scanner with a plurality of coils in which the plurality of coils is configured to detect a plurality of MR imaging datasets are provided. Each MR imaging dataset includes a plurality of MR signals detected by one coil of the plurality of coils. The system further includes a controller operatively coupled to the MRI scanner that includes at least one processor and a non-volatile memory. The controller further includes an image processing unit configured to receive the plurality of MR imaging datasets associated with the plurality of coils, identify a motion cycle using an automated motion detection method, and to partition the plurality of MR imaging datasets into a plurality of image groups, in which each image group comprises a portion of the plurality of MR imaging datasets associated with one of the phases of the motion cycle.

The invention relates to a new natural plant inorganic environment-friendly paint, comprising the following components in percentage by weight: 20.0%-50.0% of water glass, 4.0%-10.0% of silica solution, 2.0%-5.0% of condensed phosphate, 10.0%-25.0% of colored filler, 10.0%-25.0% of natural plant powder, 0.3%-0.7% of dispersing and wetting agent, 0.1%-0.2% of organic silicon defoamer, 0.1%-3.0% of thickening agent and 10.5%-20% of water. The invention also provides a preparation method of the new natural plant inorganic environment-friendly paint. According to the new natural plant inorganic environment-friendly paint and the preparation method thereof, the paint is endowed with the outer wall decoration and protection function, also has the feature of inorganic matter, is excellent in temperature-tolerance performance, meanwhile has the characteristics of being tasteless, green and environment-friendly, and is also waterproof and high in free-breathing performance; furthermore, the preparation method is simple in process, nonhazardous in production, green and environment-friendly, and applicable to large scale industrial production.

A multi-purpose protection mask for protecting the human face and head against viruses, bacteria, dust or environmental harsh impacts is presented. It has four elements. A face shield transparent sheet covers comfortably the user's face providing adequate space for freely breathing and wearing glasses. A removable and replaceable filter mask element which is a multi-layer filter piece of a proper material affixed over an opening window in the face shield. A ventilator for draining and filtering the exhalation air and humidity before dumping into the atmosphere and it consists of exhaust fans, suction tubes, suction vents, and exit filters. The ventilator prevents condensation of fogging on the face shield and glasses. Another element is a head cover mask made of a fabric material affixed to the face shield element. Fastener strips means are provided for keeping the face shield comfortable and stable on the wearer's face.