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6542570 |
Method and system for reconstructing computed tomography images using redundant data
A method and system for reconstructing an x-ray image from a partial orbit through the use of a “virtual” fan angle. The virtual fan angle is determined based upon the range of angular...
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6539074 |
Reconstruction of multislice tomographic images from four-dimensional data
The invention provides tomographic image generation from four-dimensional projection data of an imaged object. The ability is provided to extract implicit information from time dependent aspects of...
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6535572 |
Methods and apparatus for compensating computed tomographic channel ganging artifacts
A CT imaging system and method are provided in which groups of adjacent detector elements of a detector array are ganged in an x-direction; and an object is scanned using the ganged groups of...
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6529574 |
Methods and apparatus for FOV-dependent aliasing artifact reduction
In one aspect, there is provided a method for reducing aliasing artifacts in a computed tomography system. The method includes scanning an object with a computed tomography system to acquire a...
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6529576 |
Method and apparatus for pitch-adaptive reconstruction in multislice helical computed tomographic systems
One aspect of the present invention is a method that includes helically scanning an object at a selected helical pitch to acquire projection data of the object. The acquired projection data...
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6529575 |
Adaptive projection filtering scheme for noise reduction
A method and system for reducing noise in an x-ray image generated by an imaging system using an adaptive projection filtering scheme including generating system information, obtaining original...
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6526117 |
Method and apparatus to minimize phase misregistration artifacts in gated CT images
A method and apparatus for generating an optimally registered working set of two-dimensional CT images in a gated CT system, the method including, where an acquisition period is divided into...
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6522715 |
High density flex interconnect for CT detectors
A detector module includes a photosensor array having a first width, and a flexible cable operationally coupled to the photosensor array, wherein the cable has a width greater then the first width.
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6522712 |
Reconstruction of computed tomographic images using interpolation between projection views
An approach to image reconstruction provides enhanced image quality from limited projection data, particularly when the imaging object (or a portion of interest) is in motion during the tomographic...
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6522713 |
In-room start scan sequence control and method of imaging using same
An apparatus and method that allows an operator to initiate a prep delay sequence from an area adjacent a patient table are provided for use with x-ray emitting scanners. An operator is allowed to...
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6519312 |
System and method for mounting x-ray tube in CT scanner
The present disclosure provides a system for mounting an x-ray tube to a gantry disk of a CT scanner. The system is designed to make lifting and handling a heavy and cumbersome x-ray tube easier...
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6512807 |
Low signal correction for perfusion measurements
A CT scanner ( 10 ) for obtaining a medical diagnostic image of a subject includes a stationary gantry ( 12 ), and a rotating gantry ( 14 ) rotatably supported on the stationary gantry ( 12 ) for...
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6510194 |
Method and apparatus for acquiring transmitted-radiation image data
An entire detection area is divided into a plurality of division areas, and a single line sensor is disposed in each division area so that it is movable within each division area. While each line...
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6510195 |
Solid state x-radiation detector modules and mosaics thereof, and an imaging method and apparatus employing the same
A CT scanner ( 10 ) includes a reconstruction processor ( 32 ) and a mosaic X-Radiation detector ( 20 ). The mosaic detector includes plural detector elements ( 22, 22, 23, 24, 25, 26 ) arranged in...
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6507632 |
Method and apparatus for reducing artifacts in an image
A method for reducing imaging artifacts in at least one image representative of an object with a scanning imaging system is provided. The imaging system has a multislice detector array and a...
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6507633 |
Method for statistically reconstructing a polyenergetic X-ray computed tomography image and image reconstructor apparatus utilizing the method
A method for statistically reconstructing an X-ray computed tomography image produced by a single X-ray CT scan having a polyenergetic source spectrum and an image reconstructor which utilize a...
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6507631 |
X-ray three-dimensional imaging method and apparatus
An X-ray three-dimensional imaging method in which the step of irradiating an object of imaging with X-rays from an X-ray tube so as to obtain a radioactivity density as an X-ray original image is...
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6504892 |
System and method for cone beam volume computed tomography using circle-plus-multiple-arc orbit
Cone beam volume computed tomography (CBVCT) is carried out by taking signals along an orbit having a circle plus two or more arcs. A reconstruction algorithm is provided to add a correction term...
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6504895 |
Method and system monitoring image detection
An image detector monitoring system includes a detector framing node and a host computer having at least one host processor and a host memory. The detector framing node acquires image data, buffers...
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6501818 |
Apparatus and methods for displaying computed tomography fluoroscopy images including data transfer provided over a network
A computed tomography system includes an x-ray source, an x-ray detector aligned with the x-ray source, a processor coupled to the x-ray detector, and a display for displaying reconstructed images....
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6501821 |
Medical device having an arrangement for transmitting data from a data generating unit to a relatively displaceable data processing unit
A medical device which has a data generating unit and a data processing unit that can be displaced relative to each other, as well as an arrangement for transferring the data from the data...
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6501826 |
Method for the presentation of an examination subject upon employment of tomograms
In a method for the presentation of image information of an examination subject, those tomograms in a series or set of tomograms that differ in terms of the position relative to a dimension are...
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6493416 |
Method and apparatus for noise reduction in computed tomographic systems
A method for facilitating a reduction in reconstructed image noise in a computed tomography imaging system. The method includes generating projection data, characterizing a noise distribution of...
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6493415 |
X-ray computed tomography method and apparatus
An X-ray computed tomography method and apparatus for obtaining a panoramic X-ray image seen from a direction of a projection line γ (γ′) of a curved sectional area SA by expanding calculation...
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6490333 |
Methods and apparatus for cone-tilted parallel sampling and reconstruction
A method for reconstructing a computed tomographic (CT) image of an object is provided. The method includes initializing a CT imaging system in a step-and-shoot mode, scanning an object to generate...
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6490476 |
Combined PET and X-ray CT tomograph and method for using same
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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6490335 |
Helical segment image reconstruction
A method and apparatus for performing image reconstruction using data obtained by an N beam helical scan, the method including generating projection data arrays for each of the N rows in a CT...
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6487432 |
Method and system for selecting and displaying medical image data
A CT system acquires a succession of 2D slice images which are combined to produce a 3D image data set. A projection image is produced from the 3D image data set and serves as an index which...
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6487267 |
X-ray diagnostic device for producing computed tomography and radioscopic exposures
An x-ray diagnostic apparatus allows computed tomography exposures to be prepared in a first operating mode, and radioscopic exposures in a second operating mode.
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6477221 |
System and method for fast parallel cone-beam reconstruction using one or more microprocessors
Cone-beam reconstruction is performed within a practically acceptable time on a computer having one or more microprocessors. The calculations involved in the reconstruction are divided into...
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6477224 |
Radiation detector, particularly of a computed tomography apparatus
Radiation detector, particularly for a computed tomography apparatus has at least one measuring electronics board that at least amplifies the electrical signals generated by a radiation transducer...
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6471400 |
Adaptive CT monitor correction system and method
Monitor detectors can be obstructed by the patient and/or the table, leading to image artifacts in a CT scanner. An algorithm for adaptive monitor correction is therefore provided, in which the...
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6471399 |
X-ray examination device and method for producing undistorted X-ray images
In an X-ray examination device and a method for generating distortion-free X-ray images the imaging properties are calculated and distortions are corrected by providing at least one calibration...
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6470071 |
Real time data acquisition system including decoupled host computer
A real time data acquisition system includes a personal computer and a detector framing node cooperating to control generation of radiation and control radiographic detection. Data is acquired by a...
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6470065 |
Apparatus for computer tomography scanning with compression of measurement data
A CT scan system with a compressing unit that compresses the data acquired by means of an X-ray source, before the data is being transmitted to a central processing unit. The data compressing unit...
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6466638 |
Image mapping method and system
A method and system for reconstructing an x-ray image through mapping. The system rotates an x-ray source and an x-ray detector in an irregular path. A calibration factor matrix for each position...
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6466640 |
Computed tomography system and method
Method and system for computed tomography. Data is collected by irradiating a subject with x-rays. The data is interpolated and then weighted based upon the data collection time. The interpolated...
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6463115 |
Projection data correction method and apparatus, and radiation tomographic imaging method and apparatus
In order to provide a projection data correction method and apparatus that prevents artifact generation in the direction which provides a low count of penetrating radiation, and a radiation...
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6459754 |
Methods and apparatus for cone beam multislice CT correction
The present invention is, in one embodiment, a method for multi-slice, computed tomography imaging. The method includes steps of moving an x-ray source through a trajectory; projecting an x-ray...
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6459757 |
X-ray detector array with phase change material heat system
Disclosed is an X-ray detector assembly for use in a computed tomography system. The X-ray detector assembly comprises an array of detector cells coupled between two rails. A phase change material...
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6457861 |
Method and apparatus for correcting electronic offset and gain variations in a solid state X-ray detector
A method and apparatus for correcting electronic offset and gain variations in solid state x-ray detectors includes dedicating rows at the end of an x-ray detector scan. The dedicated rows may be...
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6459755 |
Method and apparatus for administering low dose CT scans
The present invention is directed to a method and apparatus for administering computed tomography (CT) imaging scans with reduced radiation dosage. The present invention includes an algorithm that...
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6453004 |
Radiology system with data transmission and associated method
Radiology system and method for data transmission comprising emission of an X-ray beam, reception of the X-ray beam after it has crossed an organ to be studied, reception control, an image former,...
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6452997 |
Method for use in tomographic imaging
This invention relates to tomographic imaging, and particularly to producing complex motion or spiral tomography images in medical X-ray imaging. According to the invention, a curved path is...
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6449330 |
Methods and apparatus for artifact reduction in computed tomographic imaging
A method for reducing artifacts in computed tomographic (CT) images is provided that is particularly useful for CT applications requiring higher gantry rotation rates. The method includes selecting...
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6444986 |
Method and apparatus for detecting an object within a heating sources's radiating beam
A method and apparatus for detecting for detecting an object within a radiating beam of a radiating source. The method receives reflected and radiated radiation directly from the object to provide...
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6442229 |
Computed tomography apparatus involving a conical radiation beam and a helical relative motion
The invention relates to a computed tomography apparatus wherein the start position and/or the stop position for a helical relative motion between the radiation source, generating a conical...
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6442235 |
Method of imaging the blood flow as a function of time in an object to be examined
The invention relates to a method of imaging the blood flow as a function of time in an object ( 3 ) to be examined, which method includes the following steps: a) acquisition of a series of X-ray...
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6438196 |
EKG driven CT image reconstruction for cardiac imaging
A method for reconstructing an image of a beating heart includes decomposing at least one electrocardiogram (EKG) RR interval, tagging projection data with cardiac phase information based on the...
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6438194 |
Method of and device for forming X-ray images
The invention relates to a method of forming X-ray images (B) from at least two series of projection data sets (P 1 , P 2 ) successively acquired along different trajectories (T 1 , T 2 ), a...
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