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6661456 |
Imaging of pixel defects in digital detectors
A method and apparatus for displaying an image generated by at least one detector of an imaging unit are disclosed herein. The method includes creating a pixel map identifying locations of bad...
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6661866 |
Integrated CT-PET system
A combined emission-transmission imaging apparatus, the apparatus comprising oppositely facing first and second photon detector segments disposed on opposite sides of an imaging area and defining...
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6658080 |
Displaying image data using automatic presets
A computer automated method for setting visualization parameter boundaries in a preset for displaying an image from a 3D data set applicable to magnetic resonance (MR) data, computer tomography...
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6654444 |
Diagnostic imaging method
The invention relates to a diagnostic imaging method for interventional radiology. According to this method layer images ( 1, 2 ) of the examination zone are reproduced in a three-dimensional view...
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6654440 |
Methods and apparatus for computed tomography scanning using a two-dimensional radiation source
A method for collecting computed tomography (CT) scan data includes positioning a gantry at a first position, collecting a partial inverted-cone beam projection at a first detector cell at the...
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6654442 |
Methods and apparatus for weighting projection data
A method for weighting projection data includes selecting a region that includes a plurality of projection data samples, dividing the region into a plurality of equally sized sub-regions, and...
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6649914 |
Scanning-beam X-ray imaging system
An x-ray imaging system according to the present invention comprising a stepped scanning-beam x-ray source and a multi-detector array. The output of the multi-detector array is input to an image...
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6650724 |
Combined 3D angio-volume reconstruction method
In a 3D angio-volume reconstruction method for a three-dimensional subject based on 2D projection exposures, shadowing artifacts are avoided by producing a 3D angio-volume dataset based on 2D mask...
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6650725 |
Method for reducing artifacts in CT images that are caused by high-density structures
A correction method is used for reducing artifacts caused by structures of high x-ray absorption in computer tomography images. By such a method, it is possible for interfering objects to be found...
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6650726 |
Method for producing an image by computer tomography
In a method for producing an image of an examination subject by computed tomography using an x-ray source that moves around the examination subject for producing the image, a number of projections...
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6650727 |
Radiation tomographic imaging apparatus and method
A radiation tomographic imaging apparatus and method are provided in which the slice thickness can be dynamically switched during scanning, and the emission center of radiation can be arbitrarily...
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6647084 |
Method and apparatus for filtering projection data of a helical scan
A method for filtering projection data of a helical scan of an object includes acquiring projection data representing a helical scan of an object, generating a weighting function based on the...
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6643533 |
Method and apparatus for displaying images of tubular structures
A method and an apparatus for displaying a structure of a vessel are disclosed. In one embodiment, the method includes identifying a centerline of the vessel within a portion of the vessel that...
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6631285 |
Fast transform for reconstruction of rotating-slat data
A nuclear medical imaging apparatus receives an associated object ( 18 ). A radiation detector ( 12 ) is equipped with a slat collimator ( 14 ) including a plurality of spaced apart slats ( 114 )...
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6631284 |
Combined PET and X-ray CT tomograph
A combined PET and X-Ray CT tomograph for acquiring CT and PET images sequentially in a single device, overcoming alignment problems due to internal organ movement, variations in scanner bed...
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6628747 |
System and method for dual-beam internal reflection tomography
A methodology and concomitant system for three-dimensional near-field microscopy achieves subwavelength resolution of an object without retrieval of the optical phase. The features of this approach...
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6628749 |
Systems and methods for intensity correction in CR (computed radiography) mosaic image composition
Systems and methods for correcting the image intensity of under-exposed regions of CR (computed radiography) images for mosaic composition. In one aspect, a method for generating a mosaic CR image...
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6628984 |
Hand held camera with tomographic capability
A tomographic imaging system includes a moveable detector or detectors capable of detecting gamma radiation; one or more position sensors for determining the position and angulation of the...
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6628815 |
Computer-aided diagnosis system and method
An x-ray system acquires an initial low-contrast, wide latitude (G=2.5, or G=2 or less) x-ray image of a breast. A processing system automatically finds suspected abnormalities in the breast by...
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6628742 |
Cardiac helical half scan reconstructions for multiple detector row CT
One embodiment of the present invention is a method for reconstructing cardiac images using a computed tomographic (CT) imaging system. The method includes steps of: selecting a helical scanning...
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6625249 |
Method, system and program product for tomographic backprojection using multi-color rendering engine
Method, system and program product are provided implementing a technique for backprojecting an image from a projection data set. The technique includes splitting the projection data set into a...
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6618467 |
Megavoltage computed tomography during radiotherapy
Reduced dose megavoltage CT images are obtained using low flux data resulting from leakage through modulating shutters and/or collected by other means and augmented by incomplete high flux data...
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6618463 |
System and method for single-beam internal reflection tomography
A methodology and concomitant system for three-dimensional near-field microscopy achieves subwavelength resolution of an object via total internal reflection. The features of this approach include:...
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6614871 |
Medical X-ray apparatus
To a supporting frame having an opening portion used to insert a table for mounting thereon an object under examination along a horizontal direction, a rotary member rotated around the opening...
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6609021 |
Pulmonary nodule detection using cartwheel projection analysis
A method for automatic detection of lung nodules in high-resolution multi-slice CT images by using cartwheel projection analysis is disclosed. The projection analysis employs weighted area curves...
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6600801 |
Method for correcting for beam hardening in a CT image
A method for correcting for beam hardening in an initial CT image, which is composed of pixels arranged in a matrix, correction data are determined from the initial image by re-projection of the...
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6600802 |
Image space correction for multi-slice helical reconstruction with z-smoothing
A method for facilitating a reduction of artifacts includes generating a first image of an object with a scanning system in native mode, generating a second image of the object with the scanning...
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6600803 |
Computed tomography apparatus and method for operating same
In a computed tomography system equipped with a data-acquisition system and a method for operating such a computed tomography system, the computed tomography system has a radiation detector with at...
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6597803 |
Hybrid reconstruction for high pitch multi-slice helical cardiac imaging
In one aspect, the present invention is a method for scanning an object with a multi-slice CT imaging system having multiple detector rows each having an isocenter. The method includes steps of...
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6597761 |
Log evaluation using cylindrical projections
A three-dimensional density distribution of a log is reduced to a two-dimensional structure that provides a convenient image or visualization of defects like knots or voids in a log, to facilitate...
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6591004 |
Sure-fit: an automated method for modeling the shape of cerebral cortex and other complex structures using customized filters and transformations
A method for reconstructing surfaces and analyzing surface and volume representations of the shape of an object or structure corresponding to image data, in which the structure has been modeled as...
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6590960 |
Computed tomography apparatus with integrated unbalanced mass detection
A computed tomography apparatus has a gantry that is rotatable around a rotational axis and a detector permanently disposed relative to the gantry, for determining an unbalanced mass of the gantry...
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6587540 |
Apparatus and method for imaging objects with wavefields
This invention describes a method for increasing the speed of the parabolic marching method by about a factor of 256. Firstly, to form true 3-D images or 3-D assembled from 2-D slices. Secondly,...
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6587538 |
Detector unit, X-ray computer tomographic photographing device, X-ray detector, and X-ray detector manufacturing method
A detector unit for detecting X rays passed through a collimator having a plurality of collimator single plates, includes a substrate attached to a collimator support for supporting the collimator,...
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6587537 |
Methods and apparatus for multi-slice image reconstruction
A method for generating an adaptively interpolated projection of an object with an imaging system includes generating a first projection using a first interpolation kernel, generating a second...
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6584167 |
Methods and apparatus for increasing scanning modes
A method for transmitting a scan mode to an imaging system includes loading a least significant nibble into a first latch register and loading a most significant nibble into a second latch register...
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6584165 |
Scan data correction view weighting of computed tomographic images
One aspect of the present invention is a method for reconstructing computed tomographic (CT) images. The method includes generating a plurality of projection data, calculating a plurality of base...
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6580853 |
Optical high speed communications for a computed tomography x-ray machine
An optical transmission line is provided that includes optical deflectors disposed within the transmission line. The deflectors are adapted to deflect an optical data signal such that a portion of...
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6577700 |
Neural network based multi-criteria optimization image reconstruction technique for imaging two- and three-phase flow systems using electrical capacitance tomography
A new image reconstruction technique for imaging two- and three-phase flows using electrical capacitance tomography (ECT) has been developed based on multi-criteria optimization using an analog...
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6577701 |
Section reconstruction method and radiographic apparatus
An X-ray tube (X-ray focus) and an X-ray detector opposed to each other across an object synchronously scan the object to acquire radiographic data in each scan position. A section reconstruction...
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6574298 |
Cone beam scanner using oblique surface reconstructions
Data collected from a cone beam scanner is reconstructed into a volumetric image representation by defining a plurality of oblique surfaces which are reconstructed into a cylinder. An interpolator...
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6574296 |
Computer tomography unit and method for operating same
In a computed tomography and a method for operating a computed tomography unit, in order to scan an object under investigation a radiation source emits a pyramid-shaped X-ray beam, which penetrates...
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6574356 |
Method for three-dimensional image reconstruction of basal ganglion
The present invention relates to a method for three-dimensional image reconstruction of basal ganglion. A novel geometrical algorithm has been developed to calculate the correction coordinates of...
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6570953 |
Method for making and reproducing a tomogram of an object, said tomogram pertaining to a section roentgenogram
In a method and x-ray apparatus for making and reproducing a radiological tomogram of a subject, the subject is irradiated with radiation emanating from a focus disposed at a known distance from a...
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6568851 |
X-ray CT scanner
An X-ray CT scanner includes an X-ray tube which irradiates an object, a variable X-ray limiting device which limits the X-ray beam thickness, an X-ray detector which detects X rays transmitted...
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6570951 |
Image space compensation scheme for reducing artifacts
A method and system for reducing artifacts in an x-ray image generated by a computed tomography imaging system using an image space compensation scheme including obtaining reconstructed image data...
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6570952 |
Memory efficient shear-warp voxel projection algorithm
A method is provided for generating an image of a three-dimensional (3D) volume from a plurality of slices corresponding to a scan of the 3D volume, each of the plurality of slices comprising slice...
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6560308 |
Method and system for approximating missing data in cone beam x-ray CT reconstruction
A method and system for computed tomography. Data is collected along a circular trajectory of an x-ray source. Data missing from the circular data is approximated. This may be accomplished by...
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6560307 |
X-ray CT apparatus
A memory includes a collected projection data storage area having, set thereto, a ring buffer area with a storage capacity for storing projection data for angles necessary to reconstruct at least...
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6553094 |
Method of determining a content of a nuclear waste container
A method and apparatus are provided for identifying contents of a nuclear waste container. The method includes the steps of forming an image of the contents of the container using digital...
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