38results about "Tomography" patented technology

A method and apparatus for customizing an intervertebral implant includes the initial step of obtaining a 3D anatomy of a series of vertebrae including an abnormal vertebra in a computer. The 3D anatomy of the series is then repositioned in the computer to eliminate the deformity caused by the abnormal vertebra. It is next determined whether a superior or inferior surface of the abnormal vertebra is an abnormal surface which causes the deformity, whereby an approximate gap between the abnormal surface and a desired normal surface is determined. Using that gap determination, a custom implant is constructed to engage the abnormal surface and fill the determined gap. Thus, when the implant is implanted between the abnormal surface and an adjacent surface of an adjacent vertebrae, the deformity is substantially compensated for. The implant may have articulation between the endplates to allow relative movement therebetween.

Disclosed are methods for reconstructing a three-dimensional image of an object's volume of interest using computed tomography that employs conical-beam, intensity-modulated projections of this object. In one embodiment, a plurality of collimating devices serves to modulate the aperture of the radiation source thereby acting to modulate the intensity of the source upon the object. Also provided are image processing devices, examination apparatus, as well as a computer-readable medium and a program element adapted and configured to perform aspects of the methods disclosed herein.

An X-ray apparatus for image acquisition and a related method. The apparatus comprises a field-of-view corrector (CS) configured to receive a scout image (SI) acquired by the imager with a tentative collimator setting in a pre-shot imaging phase where said imager operates with a low dosage radiation cone causing the detector to register the scout image. The low dosage cone has, in the detector's image plane, a first cross section smaller than the total area of the detector surface. The field-of-view corrector (CS) uses said scout image to establish field-of-view correction information for a subsequent imaging phase where the imager is to operate with a high dosage radiation cone, the high dosage higher than the low dosage.

An ultrasonic imaging method includes activating a transmit aperture within a multi-element transducer array, transmitting one or more ultrasonic beams along scan direction(s) that span the region of interest, for each transmit event, receiving ultrasound echoes from each element of a receive aperture, grouping the receive channel echo data into two or more sets corresponding to different receive sub-apertures, combining each sub-aperture data set to generate partially focused echo-location data for one or more reconstruction lines, and storing all the sub-aperture echo data sets during a storage period in a format that can be retrieved for later analysis. A method includes, during a post-storage period, retrieving stored sub-aperture data, combining the sub-aperture data to form one or more selected reconstruction lines, processing echo data to extract motion information from one or more sample positions along the selected reconstruction lines, and displaying an image representative of the processed motion information.

A method includes performing a three dimensional volume scan of a region of interest located in a portion of an object or subject in an examination region, including dynamically collimating a radiation beam used to perform the scan so that a geometry and/or location of the radiation beam tracks, during the scan, to a geometry and/or location of the region of interest, wherein the region of interest is a sub-region of the portion of the object or subject in the examination region.

The invention discloses a detector ring of a PET (positron emission tomography) detector. The detector ring comprises a body, n detector modules arranged on the body and n limiting structures. Each limiting structure comprises at least one group of radial limiting components and at least one group of tangential limiting components. The radial limiting components are of detachable structures and arranged on a plane perpendicular to the radial direction. The detector modules are fixed on the body by the radial limiting components. The tangential limiting components are used with the body to form radial channels admitting the detector modules to move in. The detector modules are inserted along the radial channels and then fixed on the body by the radial limiting structures, thereby fixedly conveniently fixed in the effective manner. In case that the detector modules are required to be detached, only with the radial limiting structures removed, the detector modules can be pulled out of the radial channels.

The invention relates to a medical image processing method which is characterized in that images formed by three-dimensional fast spin echo imaging collected by a magnetic resonance imaging system in the focus area of a patient and blood vessel images collected by a digital subtraction angiography machine are subjected to reconstruction, color inverting, cutting, 3D-3D fusion and 3D-2D registering through a post-processing work station of the digital subtraction angiography machine, so that three-dimensional blood vessel graphs can be overlapped on a real-time radio-fluoroscopic image. Therefore, by adopting the medical image processing method, real-time imaging guide can be performed during nerve involvement surgeries for blocked blood vessels, the near end and far end of the closed section of the blood vessel can be shown simultaneously through imaging, and physicians can clearly get known of conditions in the focus areas and further can perform operating better.

Provided is an ultrasonic diagnostic apparatus capable of clearly depicting areas of noteworthy hardness. In order to clearly depict 3-dimensional elasticity images of the area of noteworthy hardness, frequency is counted for each magnitude of the elasticity value for the elasticity data configuring the volume data, and elasticity values in a prescribed range which is determined on the basis of frequency, are converted to be large and elasticity values outside the prescribed range are converted to be small. By rendering the post-conversion volume data, the large elasticity values of areas of noteworthy hardness are integrated and 3-dimensional elasticity images are generated.

In an X-ray CT apparatus, an X-ray source and an X-ray detector mounted in a guide arm are freely movable in such a direction as to approach to and separate from a sample. With respect to this movement, the center of gravity of the whole containing respective constituent elements mounted in the guide arm is kept on the rotational axis by a weight balance adjusting mechanism. The weight balance adjusting mechanism contains a movable weight which is freely movable to the guide arm. The movement of the movable weight is controlled so that a difference between the rotational moment around the rotational axis is offset and substantially equal to zero. The moving passage of the movable weight is set on a straight line which is parallel to the moving direction of the X-ray source and the X-ray detector and does not pass through the rotational axis.

Provided are a method and device for ultrasonic imaging by synthetic focusing. The method comprises: exciting a plurality of matrix elements of an ultrasonic probe to transmit plane waves many times, wherein transmitting apodizations at the time of every transmission of the plane waves by the plurality of matrix elements correspond to the respective lines in a measurement matrix in which elements are randomly distributed; after every transmission of the plane waves, exciting all the matrix elements of the ultrasonic probe to receive echo signals, in order to obtain channel data; recovering a synthetic focusing channel data set by use of a compressed sensing reconstruction algorithm according to a channel data set and the measurement matrix; and subjecting the synthetic focusing channel data set to beamforming so as to generate an ultrasonic image.

The invention provides a method of using a multi-energy spectrum X-ray imaging system for the identification of articles and the multi-energy spectrum X-ray imaging system for the identification of articles. The method comprises the following steps: identifying the application scene and/or prior information of the article; selecting a parameter mode suitable for the article from a plurality of parameter modes stored in the multi-energy spectrum X-ray imaging system according to the identified application scene and/or prior information; and identifying the article by using the selected parameter mode, wherein the plurality of parameter modes are acquired by optimizing the system parameters of the multi-energy spectrum X-ray imaging system under specific conditions in virtue of training sample databases targeted to a variety of different articles. The multi-energy spectrum X-ray imaging system provided by the invention is applicable to a variety of different application scenes and realizes the balance between the performance of the system and expenditure.

According to one embodiment, an X-ray detector includes a plurality of detection packs and a plurality of heaters. Each of the detection packs includes a plurality of detection elements that detect X rays having passed through a subject and output a detection signal corresponding to the X rays and is arranged along a predetermined direction. Each of the heaters is provided corresponding to each of the detection packs and individually controls the temperature of each of the detection packs.

An ultrasound breast imaging assembly includes first and second compression plates angled with respect to one another, a breast compression area defined between the first and second compression plates, at least one pivot assembly, and an ultrasound probe. The pivot assembly allows relative motion between the first and second compression plates. The ultrasound probe, which is configured to translate over one of the first and second compression plates, includes an active matrix array (AMA) positioned on one of the first and second compression plates.

The invention relates to the technical field of auxiliary positioning of tumor radiotherapy, in particular to a dual-photosensitive tumor positioning method and an auxiliary device based on laser source and laser shadow, which solve the defects of certain limitation and poor safety of the existing tumor scanning positioning marking equipment, and the auxiliary device comprises a positioning auxiliary device and a positioning auxiliary device carrier; the positioning auxiliary device comprises a device shell, three stepping motors are distributed at the end of the device shell in the circumferential direction, a control device is arranged at the position, located between the stepping motors, of the end of the device shell, a connector is further arranged at the end of the device shell, and output shafts of the stepping motors are connected with guide rods. The positioning auxiliary device can be installed on a CT scanning bed and can also be held by hand, accurate, rapid and convenient marking or later re-drawing deepened marking can be conveniently carried out in cooperation with the CT scanning equipment, and compared with a traditional marking mode, the positioning auxiliary device has the advantages of being accurate, high in automation degree, portable and wide in application scene.

A bearing arrangement for a medical device in which a rotating component is supported relative to a stationary housing includes a bearing with an inner ring and an outer ring. The inner ring is connected to the component which is to be supported and the outer ring is connected to the housing by way of at least one damping element. To increase quiet running of the rotating component, both the inner ring and also the outer ring are made as integral elements and have an essentially hollow cylindrical base contour, with an extension of the outer ring in the radial direction being at least twice the extension of the inner ring in the radial direction.

A method for determining a predicted risk level of a clinical endpoint for a predetermined time period for a patient is provided by the present disclosure. The method includes receiving video frames of a heart, the video frames being associated with the patient, receiving electronic health record data including a number of variables associated with the patient, providing the video frames and the electronic health record data to the trained neural network, receiving a risk score from the trained neural network, and outputting a report based on the risk score to at least one of a display or a memory.

A determination processing unit determines a disease region in a medical image including an axisymmetric structure. A first determination section of the determination processing unit generates a feature amount map of the medical image from the medical image. A second determination section second inverts the feature amount map with reference to a symmetry axis to generate an inverted feature amount map. A third determination section superimposes the feature amount map and the inverted feature amount map on each other and determines the disease region in the medical image using the feature amount map and the inverted feature amount map superimposed on each other.

An ultrasound diagnostic apparatus includes a determining unit adapted to determine a depth position of a boundary of the intima-media complex at the clear boundary sound ray, and ascertain a depth position of the boundary of the intima-media complex at the unclear boundary sound ray; and an calculator adapted to calculate an intima-media complex thickness based on the depth positions of the boundary of the intima-media complex, wherein the determining unit performs pattern matching on a sound ray signal corresponding to the unclear boundary sound ray by using a sound ray signal corresponding to a clear boundary sound ray lying adjacent to the unclear boundary sound ray as a reference signal, thereby ascertaining the depth position of the boundary of the intima-media complex at the unclear boundary sound ray.

The invention discloses an airway morphological parameter quantitative acquisition method and a device, and an airway stent design method, and the method comprises the following steps: carrying out the section cutting of a chest CT image, segmenting a bronchial tree into a plurality of cross sections, carrying out the center line fitting of the plurality of cross sections, determining the three-dimensional center line of each bronchial, establishing a bronchial tree model according to the three-dimensional center line and the cross section, selecting measurement points on the three-dimensional center line, obtaining morphological parameter values at the measurement points, determining a far-end point and a near-end point on the bronchial tree, determining lumen inner diameters and lumen area values of orthogonal cross sections corresponding to a plurality of measurement points between the far-end point and the near-end point, determining the lumen area values, determining a branch included angle and a lumen volume value of the bronchial tree, and calculating a stenosis rate of a corresponding measurement point. According to the method, chest CT is segmented, a bronchial tree model is established, quantitative parameters of the model are measured, and quantitative parameters such as the lumen inner diameter, the lumen area, the branch included angle, the length and the lumen volume value are obtained.

The embodiment of the invention provides a heat dissipation device of a CT detector and a CT machine, and relates to the technical field of device heat dissipation. The heat dissipation device of the CT detector comprises a base, a shell, a guide rail, an X-ray prevention structural part and a fan assembly. The shell is fixedly installed on the base, a circuit board installation groove and a plurality of air outlets are formed in the side face of the shell, and the base is fixedly installed on a rotor of the CT machine; the guide rail is mounted on the base, and the guide rail, the shell and the base form a closed structure; the X-ray preventing structural member is mounted on the air outlet of the shell; the fan assembly is installed on the shell. The heat dissipation device of the CT detector can realize the technical effect of X-ray protection on the basis of ensuring the heat dissipation efficiency.