34results about How to "Reduce X-ray radiation" patented technology

The invention relates to a catheter device, with a position sensor system, for treatment of a partial or complete vessel blockage under image monitoring, with the catheter device featuring a treatment catheter of a vessel blockage, especially by removal or destruction of plaque and / or expansion of the vessel,, which is embodied as an integrated unit, especially as a combination catheter, with an OCT catheter and an IVUS catheter for image monitoring and with the position sensor system.

The invention provides a fixing and navigating surgery system in a vertebral pedicle based on a structure light image. The system comprises a structure light scanner, an infrared navigating and positioning apparatus, a dynamic standard, a surgery apparatus with a plurality of infrared luminous diodes and a computer, wherein the structure light scanner and the infrared navigating and positioning apparatus are arranged in a positioning way; the surgery apparatus is provided with the plurality of infrared luminous diodes, and the infrared light transmitted from the diodes are captured by the infrared navigating and positioning apparatus to define the relationship between the navigation coordinate system of the infrared navigating and positioning apparatus and the surgery apparatus coordinate system of the surgery apparatus; and the dynamic standard which is clamped on the patient vertebra is also provided with a plurality of infrared luminous diodes for instantly tracking the change of a patient coordinate system to the navigation coordinate system. The invention replaces doctor manual pointing with the structure light image scanning, reduces the manual operation error, and reduces the injure of the X ray to the doctor and the patient; and the dynamic standard also has the characteristics of small volume and good function, can improve the reliability of the surgery and the precision of the nail implantation, and reduces surgical wounds.

DPC (differential phase contrast) images are acquired for each photon energy channel, which are called spectral DPC images. The final DPC image can be computed by summing up these spectral DPC images or just computed using certain ‘color’ representation algorithms to enhance desired features. In addition, with quasi-monochromatic x-ray source, the required radiation dose is substantially reduced, while the image quality of DPC images remains acceptable.

The invention discloses an automatic exposure control method and an automatic exposure control device for an imaging device. The automatic exposure control method includes performing the exposure process twice, processing pre-exposed images, calculating image gray values of tissue areas of portions under test, taking specific value of the mean gray value to the recommended value as the essential foundation for calculating secondary exposure parameter (the mA value or exposure time value), and limiting the regulated image gray value range according to the maximum gray value and the minimum gray value so as to guarantee high-quality images acquired by the secondary exposure and reduce X-ray radiation to people under test. Since the exposure parameters are estimated according to the image gray value statistic which is much direct than the signal to noise ratio, various images can be processed effectively, and automatic exposure control accuracy is improved.

A raw DPC (differential phase contrast) image of an object is acquired. The background phase distribution due to the non-uniformity of the grating system is acquired by the same process without an object in place, and the true DPC image of the object is acquired by subtracting the background phase distribution from the raw DPC image.

The invention discloses a perspective navigation method used for a C-arm type X-ray machine, which utilizes an adapter of an image intensifier and is matched with a C-arm for use. The perspective navigation method comprises the steps of initializing a navigation control system; carrying out perspective navigation puncture positioning; setting a crisscross positioning point set by an X-axis laser head and a Y-axis laser head through a positioning control system, sending information to a command controller and carrying out laser positioning frequency flicker display; carrying out the positioningby an integrated positioning tracking system; judging whether the puncture part of a patient generates displacement or not; amending the original set value according to the actual displacement value;constituting an integrated three-dimension imaging and CT path graph by using information emitted by the command controller and the actual displacement value; and using data of the actual displacement value and the three-dimensional imaging and CT path graph for forming a new coordinate, carrying out puncture according to the new coordinate of the actual displacement value and sending the information to a data acquisition device. The perspective navigation method minimizes the harm of an operation to human body, thereby having very high safety factor.

An x-ray computed tomography apparatus has a stationary device (3) for generating x-ray radiation from an x-ray focus that moves around the examination volume on a target that at least partially surrounds an examination volume of the apparatus in one plane. From the x-ray focus an x-ray beam is directed through the examination volume onto respective, momentarily opposite detector elements of a stationary x-ray detector that at least partially surrounds the examination volume. One or more shaping elements for influencing one or more beam parameters of the x-ray beam are arranged between the target and the detector elements. One or more of the shaping elements is / are arranged on a carrier frame that can rotate around a system axis in synchronization with the movement of the x-ray focus. The shaping elements rotating with the x-ray focus enable an optimal beam shaping and / or suppression of scatter radiation.

An economical X-ray apparatus that allows a rapid exposure of comparatively large-format digital X-ray images has an exposure unit, with which a predetermined surface segment of an exposure plane can be exposed with X-ray radiation, and a digital X-ray detector that is moved in the exposure plane, with the X-ray detector being continuously periodically driven.

The invention discloses an X ray human body fluoroscopy security check system capable of performing partial scanning, which comprises an X ray generator (10), an X ray detector (20), a collimator (30), a movable platform (40) and an imaging device (50), wherein the movable platform (40) is arranged between the collimator (30) and the detector (20) and does reciprocating motion; an optical shutter device (60) is arranged in an X ray passage of the collimator (30) and comprises an optical shutter core (61) for defining a scanning region, a bearing (62) for supporting the optical shutter core, a motor (63) for driving the optical shutter core to rotate and a short shaft (64) for supporting and fixing the optical shutter core; and a plurality of X ray windows (65) corresponding to different parts of a human body are arranged at different positions on the optical shutter core (61), so that X ray irradiates the whole human body or a partial detection part of the human body through the X ray windows (65). According to the system, partial scanning can be performed aiming at a specific part of the human body, and the scanning coverage range can be adjusted, so that the radiation of X ray to the human body can be effectively reduced.

The invention discloses a closed reduction device for unstable pelvic fracture minimally invasive surgery. The closed reduction device for unstable pelvic fracture minimally invasive surgery comprises a first lateral outer frame, a second lateral outer frame, a connecting outer frame, guide rails, a guide rail sliding clamp, an outer frame sliding clamp, screws and a screw clamp, wherein the second lateral outer frame is smaller than the first lateral outer frame and arranged inside the first lateral outer frame, and the first lateral outer frame and the second lateral outer frame are fixed to the guide rails through the guide rail sliding clamp; the connecting outer frame is of the structure that the arc part is connected with transverse straight rod parts, the arc part and the transverse straight rod parts are not arranged on the same plane, and the transverse straight rod parts at the two ends of the arc part are coaxially arranged in the same plane; the connecting outer fame is connected with the second lateral outer frame through the outer frame sliding clamp; the screw clamp is used for clamping the screws and fixed on the connecting outer frame. The guide rails are arranged on two sides of an operation bed. The closed reduction device for unstable pelvic fracture minimally invasive surgery can recover an unstable pelvic fracture according to a specific route, a specific angle and specific parameters, the reduction effect is good, and pain of a patient is small.

The invention discloses a control method and a control system for heart CT (computed tomography) and a CT machine. The method comprises the steps of determining the image scanning range of the heart; performing image data acquisition on each scanning segment in the image scanning range in a preset scanning viewing angle range in at least one heart quiescent period, wherein scanning viewing angles of image data in different heart quiescent periods corresponding to single scanning segment are not coincided and are equal to the preset scanning viewing angle range after being accumulated. By adopting the technical scheme disclosed by the invention, the image quality can be improved, and unnecessary X-ray radiation is reduced.

A computer-implemented method of processing 2D images of an asymmetrical object, includes:a) generating a 3D surface reconstruction of the object from 2D images of the object obtained from different perspectives;b) generating data specifying a point of interest in at least one 2D image used to generate the 3D surface reconstruction;c) generating data specifying an area of interest in the object, wherein the specified point of interest lies within the specified area of interest;d) identifying a plane containing view directions with reduced foreshortening for the specified area of interest;e) determining a 3D point corresponding to the specified point of interest on the 3D reconstruction of the object; andf) generating data representing at least one particular view direction corresponding to the 3D point and contained with the identified plane.A corresponding apparatus and computer program are also disclosed.

The invention relates to an apparatus and a system for visualizing an image object relating to an instrument (3), partitularly a medical instrument, in an extracorporeal image. The image object may comprise a representation of the instrument (3) or an intracorporeal image (40) acquired using the instrument (3). The system comprises an extracorporeal image acquisition device (1) for acquiring extracorporeal images with respect to an extracorporeal image frame and a tracking arrangement (2) for tracking the instrument (3) independent of the extracorporeal images with respect to a tracking frame. Further, the invention relates to a method carried out in the system.

The invention relates to a surgical navigation method and system, in particular to a method and a system for realizing surgical navigation by using a real-time structured light technology. According to the method, real-time structured light is used for scanning a structured light coverage area of an operation area in real time to obtain three-dimensional point cloud data, and then registration is carried out through unmarked registration and preoperative images; meanwhile, the surgical instrument in the space is recognized through structured light, then the surgical instrument in the space is positioned, real-time 3D point cloud reconstruction and preoperative image superposition are synchronously carried out, and finally the purpose of precise navigation surgery is achieved. The invention further provides the system for implementing the method. The system comprises a DICOM module, a preoperative planning module, a three-dimensional scanning module, an unmarked registration module, a display module, a computer aided design (CAD) module and a computer vision enhancement module. According to the method and the system, the space relation between the focus and the operation instrument can be directly obtained, one-time space conversion is reduced, errors are reduced, and accurate positioning is achieved.

The invention belongs to the field of medical apparatus and instruments and discloses a guider for fixing dynamic hip screws for proximal femoral fractures. A base plate is arranged at one end of the guider; a connection post is connected to the base plate; a handle is arranged at one end of the connection post; a plurality of parallel needle guide tubes are connected to the base plate and the connection post; needle guide holes are formed in two ends of the needle guide tubes and opened on the base plate and the connection post. When using, a guide needle is drilled into an optional needle guide hole firstly and then the required needle guide holes are selected according to the actual requirement. The guider is simple in structure, accurate and reliable in guide and location, good in use effect and capable of shortening operation time and reducing hemorrhage during operation and medical X-ray radiation.

A master-slave same structure teleoperation fracture reduction mechanism includes a frame assembly, two parallel platform assemblies, a top platform connecting plate (9), an operating handle assembly, two fixing assemblies, a controller (15), six movement assemblies and 24 hydraulic pipes (26). The operating handle assembly is located in the middle of the upper platform (5), and the two fixing assemblies are located on the top of the parallel platform assembly. The two parallel platform assemblies are disposed on the frame assembly; the controller (15) and the six movement assemblies are disposed on the frame assembly; A top platform connecting plate (9) is connected to the fixing assembly parallel platform assembly. The hydraulic pipes (26) is in communication with motion hydraulic cylinders (7a) and the other end of the hydraulic pipes is in communication with one of platform hydraulic cylinders (7b). The invention assists a doctor to achieve fracture reduction.

The invention provides a mobile X-ray machine device and a X-ray image acquisition method. The mobile X-ray machine device comprises a X-ray machine device, the X-ray machine device comprises a car body, an upright column, a cantilever, an ox head,, and a beam limiting device, the X-ray machine device also comprises a portable flat panel, which is detachably connected with the ox head, the portable flat panel and the X-ray machine device communicate through a wireless way in a divided state, and communicate through a wireless / wire way in undivided state; a locking device, wherein the locking device is used to realize locking / unlocking between the cantilever and the car body; a first camera, wherein the first camera is used to collect images in front of the upright column. According to the technical scheme, the mobile X-ray machine device and the X-ray image acquisition method intelligentize the X-ray shooting process of the mobile X-ray machine device, improve the shooting efficiency, and enhance the user experience.

The invention discloses a bone age tester capable of scattering low-dose X-rays, which comprises a tester rack, an X image generator, a control module, a scanning module, a driving module, a detectionmodel, and a marking device, the X image generator is arranged on the tester rack and connected to the scanning module, the control module is connected to the X image generator, the driving module and the detection module, the marking device is arranged on a detected human tissue, the detection module is arranged on the X image generator, and the detection module is used for identifying the marking device. According to the bone age tester disclosed by the invention, as the detection module moves along with the scanning module, linear X-ray scanning is formed; moreover, only after the markingdevice is detected by the detection module can signals being fed back to the control module, the control module makes a judgment, if the detected human tissue is already completely scanned, then the scanning module makes a returning movement, returning to the initial position, consequently, the dose of X-rays is reduced, and X-ray radiation is decreased.

The invention discloses an adjustable guiding device for imbedding a pedicle screw, and belongs to the technical field of the orthopedic surgery instruments, and is used for accurately imbedding the pedicle screw. The technical solution is as follows: a spinous process screw is vertically and fixedly connected with the center of the rear part of the centrum, and used as the criterion for imbedding the pedicle screw. An arc sliding plate is symmetrically distributed at two sides of the spinous process screw. A guiding sleeve is a slender circular rod. The center of the circular rod is provided with a guiding hole. The aperture of the guiding hole is matched with the outer diameter of the pedicle screw. The rod body of the guiding sleeve is perpendicular to the arc sliding plate. The upper part of the guiding sleeve is slidably connected with the arc sliding plate. The pedicle screw is pushed into the centrum along the inner hole of the guiding sleeve. The adjustable guiding device is capable of ensuring two pedicle screws 2 imbedded to two sides of the same centrum to be symmetrically imbedded to the vertebral pedicle of the centrum 1 in the same angle, finally enabling the vertebral fracture block to obtain the firm and symmetrical holding strength, greatly reducing the operation time at the same time, and reducing the X-ray radiation suffered by doctors and patients.