摘要:
In one embodiment, a method is provided for performing computed tomography (CT) imaging. The method includes obtaining EKG gating information from an object and obtaining attenuation measurements from the object utilizing a detector that is rotated in a scan plane around the object. The method further includes performing a first reconstruction based on a first portion of the attenuation measurements that are collected by a first region of the detector, where the first reconstruction is performed independent of the EKG gating information to obtain a first reconstruction data set. A second reconstruction is performed based on a second port of the attenuation measurements that are collected by a second region of the detector, where the second reconstruction is performed based on the EKG gating information to obtain a second reconstruction data set.
摘要:
A method for reconstructing images of structures undergoing physiological motion comprises acquiring a first volume of data over a first motion cycle. The first volume comprises a first overlap volume. A second volume of data is acquired over a second motion cycle and comprises a second overlap volume. The first and second overlap volumes comprise like anatomical regions with respect to each other. A reconstructed volume of data is formed based on temporal data within the first and second overlap volumes.
摘要:
A method and system for filtering medical images is described. The described method of filtering medical images includes receiving image data including a plurality of images from an image scan, determining a number of interpolation elements based on a slice thickness of the plurality of images, and filtering the image data using the determined interpolation elements.
摘要:
A method for combining images acquired using helical half-scan imaging comprises identifying an image plane within an overlap region comprising data from first and second view streams representative of first and second cycles of acquired image data. The image plane comprises the same anatomical structure. First and second weighting functions are calculated for first and second images based on first and second tube positions of an x-ray tube. The first and second images correspond to the image plane and are from the first and second view streams, respectively. The first and second tube positions also correspond to the image plane. A weighted image is then formed based on the first and second weighting functions and the first and second images.
摘要:
Methods and apparatus for x-ray imaging with focal spot deflection are provided. The apparatus includes an x-ray tube having a cathode configured to emit electrons and an anode having a target with a target surface defining a target angle. The emitted electrons are deflected onto the target surface with the target surface substantially aligned with a z-axis parallel to a gantry rotation axis.
摘要:
Methods and apparatus for x-ray imaging with focal spot deflection are provided. The apparatus includes an x-ray tube having a cathode configured to emit electrons and an anode having a target with a target surface defining a target angle. The emitted electrons are deflected onto the target surface with the target surface substantially aligned with a z-axis parallel to a gantry rotation axis.
摘要:
A method for obtaining data includes acquiring Computed Tomography (CT) scout data at a Z location with a first x-ray spectrum, and acquiring CT scout data at the Z with a second x-ray spectrum different from the first x-ray spectrum.
摘要:
A CT Fluoro system which, in one embodiment, includes an integrated controller, image reconstruction algorithms for increasing the speed of image display, and an enhanced image display, is described. The integrated controller enables the radiologist to maintain control of the system throughout the fluoro scan. The image reconstruction algorithms are generally directed to increasing the image frame rate or reducing image artifacts, or both, in the CT fluoro scan. The image display generally provides enhanced images and control to the radiologist during a scan procedure.
摘要:
The present invention, in one form, is a method for generating depth information images of an object using a computed tomography system by performing multiple scout scans of the object, generating a scout image for each scout scan, and displaying the scout images from each scout scan at least once. As a result, the multiple scout images contain depth information of anatomical objects and 3D images are rapidly generated without increasing the cost of the system.
摘要:
A system, method, and apparatus includes a computed tomography (CT) detector array having a central region with a plurality of central region detecting cells configured to acquire CT data of a first number of slices during a scan, a first wing along a first side of the central region, and a second wing along a second side of the central region opposite the first side. The first wing includes a plurality of first wing detecting cells configured to acquire CT data of a second number of slices during the scan. The second wing includes a plurality of second wing detecting cells configured to acquire CT data of a third number of slices during the scan. The second and third number of slices are less than the first number of slices. The first wing detecting cells are of a different type than the central region detecting cells.