2836 results about "Computed tomography" patented technology

An x-ray scanning imaging apparatus with a rotatably fixed generally O-shaped gantry ring, which is connected on one end of the ring to support structure, such as a mobile cart, ceiling, floor, wall, or patient table, in a cantilevered fashion. The circular gantry housing remains rotatably fixed and carries an x-ray image-scanning device that can be rotated inside the gantry around the object being imaged either continuously or in a step-wise fashion. The ring can be connected rigidly to the support, or can be connected to the support via a ring positioning unit that is able to translate or tilt the gantry relative to the support on one or more axes. Multiple other embodiments exist in which the gantry housing is connected on one end only to the floor, wall, or ceiling. The x-ray device is particularly useful for two-dimensional multi-planar x-ray imaging and / or three-dimensional computed tomography (CT) imaging applications

An x-ray scanning imaging apparatus with a generally O-shaped gantry ring, which has a segment that fully or partially detaches (or “breaks”) from the ring to provide an opening through which the object to be imaged may enter interior of the ring in a radial direction. The segment can then be re-attached to enclose the object within the gantry. Once closed, the circular gantry housing remains orbitally fixed and carries an x-ray image-scanning device that can be rotated inside the gantry 360 degrees around the patient either continuously or in a step-wise fashion. The x-ray device is particularly useful for two-dimensional and / or three-dimensional computed tomography (CT) imaging applications.

The present invention relates to a method of designing an orthopedic implant in which a plurality of samples of the bone are selected and a CT scan of each of the samples of the bone is taken so that the data from the CT scan can be used to generate a 3D graphical solid body model of each of the sample of the bone. The 3D graphical models are placed into a category of one or more of average, small, and large, and the center of mass and an X, Y and Z plane for each model is determined. The 3D graphical models for one category is assembled and aligned at the center of mass to create a categorized composite 3D graphical solid body model of the bone. The categorized composite 3D graphical model is sectioned at a specified interval to create a lofted contoured surface of a selected thickness which is cut to create a categorized implant profile. The categorized implant profile is graphically fit on the categorized composite 3D graphical model and on the 3D graphical model of each of the sample of the bone in a category to check for conformity to the surface of the bone. The categorized implant profile is used to create a design of the implant.

A high spatial resolution X-ray computed tomography (CT) system is provided. The system includes a support structure including a gantry mounted to rotate about a vertical axis of rotation. The system further includes a first assembly including an X-ray source mounted on the gantry to rotate therewith for generating a cone X-ray beam and a second assembly including a planar X-ray detector mounted on the gantry to rotate therewith. The detector is spaced from the source on the gantry for enabling a human or other animal body part to be interposed therebetween so as to be scanned by the X-ray beam to obtain a complete CT scan and generating output data representative thereof. The output data is a two-dimensional electronic representation of an area of the detector on which an X-ray beam impinges. A data processor processes the output data to obtain an image of the body part.

A method and system useful for planning a dental restorative procedure of a patient and for producing at least one dental restoration or product related thereto to be used in said dental restorative procedure are disclosed. Input data from different sources, e.g. 3D data from a CT scan of a patient with a dental impression tray including a previously prepared dental impression of the patient in the patient's mouth, is matched with data from a high resolution 3D scan of the same dental impression. The resulting data is for instance matched by means of fiducial markers arranged at the dental impression tray. Thus reliable planning and production are enabled by means of the same, matched data set. In this manner the dosage to which the patient is exposed to may be reduced in comparison to previous methods.

The present invention provides an endoscope for in vivo imaging the cells, tissue, organs or body cavities of humans or other animals to observe and locate, diagnosis and / or treat disease. Illumination sources, image detectors, sensors may be provided alone or in combination on the removable tip allowing functional alterations or optimization for a particular procedure. Endoscope features such as an instrument channel supporting tissue sampling, suction, treatment, micro-surgery, optical computed tomography, confocal microscopy, laser or drug treatments, injections, gene-therapy, marking, implanting or other medical techniques are maintained.

A system includes a detector and a processing unit. The detector includes multiple pixels configured to detect computed tomography (CT) events and nuclear medicine (NM) imaging events. The CT events correspond to X-rays emitted from a X-ray source through an object to be imaged, and the NM imaging events correspond to gamma rays emitted from a radiopharmaceutical that has been administered to the object. The detector is configured for photon counting detection of the CT events and the NM imaging events. The processing unit includes at least one processor and at least one memory comprising a tangible and non-transitory computer readable storage medium. The processing unit is configured to, based on corresponding energy levels of the CT events and the NM imaging events, identify CT information corresponding to the CT events and identify NM information corresponding to the NM imaging events.

A method and system for physiological gating is disclosed. A method and system for detecting and predictably estimating regular cycles of physiological activity or movements is disclosed. Another disclosed aspect of the invention is directed to predictive actuation of gating system components. Yet another disclosed aspect of the invention is directed to physiological gating of radiation treatment based upon the phase of the physiological activity. Gating can be performed, either prospectively or retrospectively, to any type of procedure, including radiation therapy or imaging, or other types of medical devices and procedures such as PET, MRI, SPECT, and CT scans.

Radiolabeled epidermal growth factor receptor tyrosine kinase (EGFR-TK) irreversible inhibitors and their use as biomarkers for medicinal radioimaging such as Positron Emission Tomography (PET) and Single Photon Emission Computed Tomography (SPECT) and as radiopharmaceuticals for radiotherapy are disclosed.

Computed tomography device comprising an x-ray source and an x-ray detecting unit. The x-ray source comprises a cathode with a plurality of individually programmable electron emitting units that each emit an electron upon an application of an electric field, an anode target that emits an x-ray upon impact by the emitted electron, and a collimator. Each electron emitting unit includes an electron field emitting material. The electron field emitting material includes a nanostructured material or a plurality of nanotubes or a plurality of nanowires. Computed tomography methods are also provided.

A multichannel, contactless power transfer system includes a primary power inverter disposed on a stationary side of the system, and an auxiliary power inverter disposed on the stationary side of the system. A rotary transformer has a primary side thereof disposed on the stationary side of the system and a secondary side disposed on a rotating side of the system. The rotary transformer is configured to couple primary power from an output of the primary power inverter to a primary power voltage output on the rotating side of the system, and is further configured to couple auxiliary power from an output of the auxiliary power inverter to at least one auxiliary voltage output on the rotating side of the system.

A system and method for detecting the aortic valve is provided. The method comprises: (a) casting rays on a slice of a computed tomography (CT) dataset of an aorta; (b) computing a Gaussian model for voxels on the slice, wherein the Gaussian model produces a threshold; (c) growing a circle from a point within the aorta until control points of the circle reach the threshold; (d) computing a repulsion vector for each control point reaching the threshold; (e) repositioning the circle according to an average of the repulsion vectors, wherein if the circle is within the aorta, repeating steps (c-e) until the circle is not within the aorta; (f) calculating a statistical value for the circle; (g) projecting a copy of the circle onto an adjacent slice; (h) reducing the radius of the copy of the circle; and (i) repeating steps (c-h) on remaining CT slices until the aortic valve is detected.

The threat determination process for CT scan of baggage eliminates the need for complete reconstruction the bag. The CT scan data is analyzed during scanning to locate potential threats. The analysis is based upon a lineogram representing objects in the bag. The mass, size, location and atomic number of objects are determined based upon the lineogram data. Any potential threats are further subjected to data modification and reconstruction to enhance the view of the potential threat. Dual energy scanning may also be used to determine density for resolution of potential threats.