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6310938 |
Methods and apparatus for calibrating CT x-ray beam tracking loop
The present invention is, in one embodiment, a method for determining tracking control parameters for positioning an x-ray beam of a computed tomography imaging system having a movable collimator...
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6307912 |
Methods and apparatus for optimizing CT image quality with optimized data acquisition
A method is described for optimizing signal-to-noise performance of an imaging system, including the steps of scout-scanning an object to obtain scout scan data; determining a plurality of...
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6307911 |
Fast hierarchical backprojection for 3D Radon transform
Data representing a three-dimensional (3D) sinogram (array of numbers) is backprojected to reconstruct a 3D volume. The transformation requires N 3 log 2 N operations. An input sinogram is...
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6307910 |
Methods and apparatus for reduced radiation coronary computed tomography imaging
Methods and corresponding apparatus for imaging a portion of a patient's body with a computed tomographic imaging system configured to scan the patient's body at a cyclically varying view angle, in...
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6307909 |
Method for image reconstruction in a computed tomography device
In a method for image reconstruction in a computed tomography (CT) device, which picks up projections of a region located in a measuring field of an examination subject having an extent which...
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6307908 |
System and method for data interpolation in a multislice x-ray computed tomography system
The present invention comprises a system and method for producing images of an object utilizing an x-ray computed tomography (CT) system. Detector elements within the CT system provide raw...
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6304627 |
Radiographic diagnostic device with a computed tomography system having a line detector, and a positionable additional radiation detector
Radiographic diagnostic device has a projection unit that is formed as a computer tomography system with a radiation emitter and a line detector, which are constructed such that they can be rotated...
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6304626 |
Two-dimensional array type of X-ray detector and computerized tomography apparatus
A two-dimensional array type of X-ray detector, incorporated into an X-ray computerized tomography apparatus, has a plurality of X-ray detecting elements arranged in the X and Y directions for...
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6304625 |
Dose instrumentation methods and apparatus for collimated CT imaging systems
One embodiment of the present invention is a method for measuring a radiation dose of a patient applied by a computerized tomography (CT) imaging system having a radiation source emitting a...
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6302580 |
Apparatus for solid state digital imager tracking radiography
A radiographic imaging system including a solid state x-ray imager is disclosed. An x-ray tube is supported in a vertical x-ray tube support system alternately or in addition to a overhead...
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6301324 |
RF slipring receiver for a computerized tomography system
A computerized tomography (CT) system having an apparatus and method for receiving high data rate communication is disclosed herein. The apparatus includes a controlled variable attenuator for...
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6298112 |
Methods and apparatus for helical multi-frame image reconstruction in a computed tomography fluoro system including data communications over a network
A method for producing a base tomographic image and a subsequent tomographic image of an object using projection data acquired in a scan with a system which includes an x-ray source and a detector...
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6298110 |
Cone beam volume CT angiography imaging system and method
Only a single IV contrast injection with a short breathhold by the patient is needed for use with a volume CT scanner which uses a cone-beam x-ray source and a 2-D detector for fast volume scanning...
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6298109 |
X-ray imaging system
An x-ray imaging system provides automatic adjustment of x-ray tube voltage and current as deduced from two exposures at different voltages. Real-time image distortion removal and image rotation...
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6295464 |
Apparatus and method for dynamic modeling of an object
A method and apparatus for dynamic modeling of an object having material points. The method includes receiving signals from a sensor which correspond to respective material points; providing a...
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6295331 |
Methods and apparatus for noise compensation in imaging systems
A method and apparatus for image reconstruction in an imaging system having an x-ray source, an x-ray detector module having a plurality of detector channels, a data acquisition system coupled to...
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6292578 |
System and method for restoring, describing and graphically displaying noise-corrupted boundaries in tomography images
Noise-corrupted boundary information in tomographic images is restored using a data structure, called a "boundary envelope". Both the restored boundary information and a measure of the precision of...
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6292527 |
Method for operating a computed tomography (CT) device
In a method for operating a computed tomography (CT) device, having a detector system formed by an array of detector elements that are arranged in rows that extend substantially in the direction of...
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6292526 |
Methods and apparatus for preprocessing volumetric computed tomography data
The present invention is in one embodiment a method of processing projection data collected in a helical scan performed along a helical trajectory relative to an object being scanned. The method...
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6292525 |
Use of Hilbert transforms to simplify image reconstruction in a spiral scan cone beam CT imaging system
A method and apparatus for three dimensional (3D) computerized tomography (CT) imaging wherein a reconstructed image is developed by calculating along line segments L formed in cone beam data. The...
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6289074 |
X-ray computed tomography method and system
An X-ray computed tomography (CT) method of producing sectional images and panoramic images while reducing the exposure dose and time. The method includes producing an X-ray projection image on a...
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6289073 |
X-ray CT apparatus
An X-ray CT apparatus includes a frame 1 and a radiographic unit accommodated in the frame 1. The upper portion of the frame 1 is shaped to be generally semicircular. In this X-ray CT apparatus,...
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6285733 |
Computed tomography method utilizing a conical radiation beam
The invention relates to a computed tomography method in which the examination zone is scanned along a circular path by means of a conical radiation beam. The computation required for the...
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6285732 |
Methods and apparatus for adaptive interpolation reduced view CT scan
In one aspect, the present invention is a method for computerized tomographic (CT) imaging of an object, the method including steps of scanning an object with a CT imaging system to acquire views...
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6282257 |
Fast hierarchical backprojection method for imaging
A process for backprojecting a sinogram to a tomographic image includes the steps of subdividing the sinogram into a plurality of subsinograms, preferably in a recursive manner, until each...
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6275562 |
Apparatus and methods for performing scalable multislice computed tomography scan
A scalable multislice system which, in one embodiment, includes a scalable multi-slice detector, a scalable data acquisition system (SDAS), scalable scan management, control, and image...
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6275561 |
Computer tomagraphy method with helicoidal scanning of an examination area
The invention relates to a CT method which involves helical scanning of an examination zone by means of a cone beam. Measuring data for the three-dimensional tomographic imaging of objects of...
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6275559 |
Method and system for diagnosing faults in imaging scanners
A system is provided for identifying faults in a non-OEM computed tomography system having components in connection with the detectors to reconstruct an image. Then, correlation values are derived...
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6272230 |
Apparatus and method for optimizing detection of objects in computed tomography data
A method of and apparatus for detecting objects in computed tomography (CT) data includes the ability to define the types of objects to be detected, and at least one algorithm related to the...
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6272201 |
Methods and apparatus for efficient data acquisition in CT scanners
In one aspect, the present invention is a method for imaging an object utilizing a multi-slice CT imaging system having an x-ray source, a detector array, and a data acquisition system coupled to...
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6269141 |
Computer tomography apparatus with a conical radiation beam and a helical scanning trajectory
The invention relates to a computer tomography apparatus in which the scanning trajectory is shaped as a helix and a conical radiation beam traverses the examination zone. According to the...
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6269139 |
Methods and apparatus for pre-filtering weighting in image reconstruction
Methods and apparatus for weighting data collected in a computed tomography scan using a digital flat panel are described. In one embodiment, the method includes the steps of selecting a weighting...
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6266387 |
Command sequencer for a CT imaging system
A CT imaging system employs a command sequencer to control the operation of the x-ray source and the data acquisition system. The command sequencer stores a set of commands in a FIFO memory that...
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6264364 |
Medical x-ray system suited for angiography
A medical x-ray system, such as an angiography system has an x-ray tube that emits and a radiation receiver, which are arranged at a C-arm, a stand supporting the C-arm, which has an arm that is...
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6263040 |
Methods and apparatus for cone-tilted parallel sampling and reconstruction
In one aspect, the present invention is a method for generating an image using a digital flat panel detector wherein a pre-defined delay triggering sequence is utilized to acquire a set of parallel...
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6256370 |
Method and apparatus for performing tomosynthesis
A method and an apparatus are provided that enable x-ray projection data acquired by a tomosynthesis system to be transformed into a form as if it had been acquired by a computed tomography (CT)...
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6256366 |
Apparatus and method for reconstruction of volumetric images in a computed tomography system using sementation of slices
A system for reconstructing image data for a region includes a radiation source and an array of detectors located on opposed sides of the region used to generate scan data for the region from a...
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6256365 |
Apparatus and method for reconstruction of images in a computed tomography system using oblique slices
An apparatus and method for reconstructing image data for a region are described. A radiation source and an array of detectors located on opposed sides of a region are used to generate scan data...
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6256364 |
Methods and apparatus for correcting for x-ray beam movement
The present invention, in one form, is a system which, in one embodiment, corrects for position errors of an x-ray beam caused by dynamic movement and thermal drift of the imaging system. More...
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6252925 |
System and method for performing computed tomography with fiber waveguides
A system and method for performing computed tomography without having to use a complicated mechanical device to move an x-ray source about an object being scanned. Instead, this invention uses...
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6249563 |
X-ray detector array maintained in isothermal condition
X-ray detector apparatus is provided for use in a CT imaging system having a rotatable gantry. The apparatus comprises a selected number of X-ray detector cells and two curved rails, which hold the...
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6243438 |
Multi-slice detector array
Apparatus for producing multiple image slice data responsive to incident radiation passing through an object. The apparatus includes a detector array having a plurality (p) of parallel rows of...
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6243436 |
CT device for imaging slices that are inclined toward the system axis
A CT device for imaging slices that are inclined toward the system axis has an input unit for the entering the position of at least one slice that is to be imaged and that is inclined toward the...
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6240157 |
Technique and arrangement for tomographic imaging
Complete helical cone-beam scanning and non-redundant data acquisition are obtained for three-dimensional tomographic imaging of arbitrary long objects. The minimum sized two-dimensional detector...
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6236704 |
Method and apparatus using a virtual detector for three-dimensional reconstruction from x-ray images
Compensation can be provided for rotational and translational motion of a detector relative to the X-ray source in a C-arm X-ray device by warping the image on the detector plane to a virtual...
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6233308 |
Methods and apparatus for artifact compensation with variable angular sampling
The present invention, in one form, includes an imaging system having a x-ray source and a digital detector array. The system alters an angular spacing between samples of projection data as a...
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6233303 |
Method and apparatus for reducing X-ray dosage in a spiral scan cone beam CT imaging system
A scanning and data acquisition method and apparatus for three dimensional (3D) computerized tomography (CT) imaging of an ROI in an object, wherein a reconstructed image is developed by...
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6231802 |
Rapid prototyping method
A volume sequential technique allows the production of prototypes from a liquid photopolymer precursor without requiring the CAD model to be decomposed into slices. Inverse Tomographic Construction...
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6229870 |
Multiple fan beam computed tomography system
A CT scanner includes a stationary gantry (A) defining an examination region (12) and a rotating gantry (C) which rotates about the examination region. Multiple fan beam generators (B), each...
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6229869 |
Tilted gantry image correction for a multislice computed tomography system
The present invention allows for accurate reconstruction of images based on multislice CT system scans using a tilted gantry. The present invention comprises a system and method for shifting the...
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