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6493646 |
High order primary decay correction for CT imaging system detectors
Degradation in reconstructed medical images is reduced by a method for calibrating a primary decay correction for a radiation detector having a decay curve that can be characterized by a plurality...
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6490334 |
Methods and apparatus for high pitch helical computed tomography image reconstruction
There is therefore provided, in one aspect, a method for imaging an object utilizing a computed tomographic (CT) imaging system having a rotating gantry, a multislice detector array on the rotating...
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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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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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6480562 |
Apparatus and method of converting electromagnetic energy directly to electrons for computed tomography imaging
The present invention provides a detector for a multi-slice CT system. The detector includes a scintillator for receiving and converting high frequency electromagnetic energy directly to electrons....
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6477222 |
Getter for atmospheric gases in optical switch working fluid
An optical switch includes a core and a fluid reservoir. The core includes a base, a matrix controller substrate, and a planar lightwave circuit. The planar lightwave circuit has a plurality of...
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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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6473486 |
System and method of computed tomography imaging using a focused scintillator and method of manufacturing
The present invention provides a detector for a CT imaging system. The detector includes a focused scintillator for receiving and converting high frequency electromagnetic energy to light energy....
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6466645 |
Methods and apparatus for tube-spit correction
In one aspect, the present invention relates to tube-spit detection and correction. In an exemplary embodiment, and once a sample of projection data has been collected, the projection data is...
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6463117 |
Methods and apparatus for tilted helical image reconstruction in CT imaging
To reduce the computational load in comparison to the iso-center shift described above, instead of selecting the z-axis of the coordinate system as the iso-center for reconstruction, the gantry...
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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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6449331 |
Combined PET and CT detector and method for using same
A combined positron emission tomography (PET) and computed tomography (CT) detector mounted on a single support on the same gantry of a combined PET and CT scanner. The common detector includes an...
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6445764 |
Multi-slice X-ray CT apparatus and method of controlling the same
For the purpose of reconstructing a plurality of X-ray tomographic images having a plurality of practical slice thicknesses while reducing the number of X-ray detector arrays and simplifying...
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6445763 |
Methods and apparatus for application specific computed tomographic radiation detection
One aspect of the present invention is a detector array for an imaging system, the detector array having a plurality of electrically conductive busses, a plurality of detector elements arranged in...
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6438198 |
Computed tomography method
A computed tomography method in which novel compromise is reached between transmission bandwidth and image quality. The method includes combining the signals of at least two neighboring detector...
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6438197 |
X-ray computed tomography apparatus with correction for beam hardening
In an X-ray computed tomography apparatus having a radiation filter, a patient attenuation value representative of the linear beam attenuation by a patient under examination is determined in an...
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6429718 |
Computer tomograph with a multi-stage charge-integrated read amplifier
The invention relates to a computer tomograph provided with a charge-integrating read amplifier having a plurality of gain factors for a data acquisition system as well as a control circuit for the...
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6426991 |
Back-illuminated photodiodes for computed tomography detectors
A CT scanner ( 10 ) includes a reconstruction processor ( 32 ) for reconstructing an image from digital signals from detector arrays ( 20 ). Each detector array includes scintillation crystals ( 22...
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6426992 |
Computed tomography apparatus involving a conical radiation beam and a helical relative motion
The invention relates to a computed tomography apparatus whose radiation source emits a conical radiation beam and is capable of scanning the examination zone along a trajectory in the form of a...
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6424692 |
Medical image processing with controlled image-display order
A diagnostic system is provided to display images in an image-display order complying with a desired scan direction in performing a multi-scan. The system is realized by, by way of example, an...
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6422749 |
Imaging system with X-ray beam angulation compensation
In an X-ray imaging system, an arrangement is provided for readily aligning the system detector with the X-ray beam field, i.e., the projection of the X-ray beam into the plane of the detector. The...
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6421411 |
Methods and apparatus for helical image artifact reduction
Methods and apparatus are provided for reducing image artifacts from a computed tomography (CT) image generated using a CT system. A plurality of projection views of an object are obtained and a...
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6421413 |
Methods and apparatus for interactively displaying curved reformation images
One embodiment of the present invention is a method for interactively rotating a sampling surface of a reconstructed computed tomographic (CT) image. The method includes steps of: scanning a volume...
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6421412 |
Dual cardiac CT scanner
The present invention, in one form, is an imaging system for generating images of an entire heart. In one embodiment, projection data is collected for a field of view containing only the heart so...
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6418185 |
Methods and apparatus for time-multiplexing data acquisition
A single-slice data acquisition system (DAS) for a CT imaging system is time-multiplexed to measure more than one signal over the DAS standard sampling time interval. In one embodiment, a detector...
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6418183 |
Methods and apparatus for two-pass CT imaging
One aspect of the present invention is a method for imaging a volume of a patient with a computed tomographic (CT) imaging system. The method includes steps of: scanning a volume of a patient with...
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6418186 |
X-ray image pickup device
In an X-ray imaging apparatus in which X-ray beams are irradiated on a subject ( 4 ) and a tomogram of the subject is reconstructed from helically scanned X-ray images and displayed, reconstructing...
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6415013 |
Backprojection methods and apparatus for computed tomography imaging systems
There is therefore provided, in one embodiment of the present invention, a method for reconstructing a volume image of an object. The method includes steps of scanning an object with a multislice...
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6411672 |
Radiation detector and X-ray CT apparatus
An X-ray CT radiation detector includes a heat insulating case mounted on a rotating base, a radiation incident window formed in the heat insulating case, a detection panel on which detection...
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6411671 |
Method for reducing line artifacts in a CT image and device for implementing the method
In a method and apparatus for reducing line artifacts in a CT image D 1 , which is acquired during a scan by a CT device with a detector system having a number of proper detector channels and at...
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6411673 |
Sampling rate scaling of calibration vectors in x-ray CT machines
Time consuming calibration of a multi-element x-ray detector for an x-ray computed tomography machine that has multi-sample rate capabilities is reduced by determining through the use of air-scans,...
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6408042 |
Methods and apparatus for cone beam artifact suppression in scanning imaging systems
One embodiment is a method for reconstructing at least one image representative of an object utilizing a scanning imaging system having a multislice detector array and a radiation source. The...
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6404841 |
Image thickness selection for multislice imaging system
Scalable multislice systems which, in one embodiment, includes a scalable multislice detector, a scalable data acquisition system (SDAS), scalable scan management, control, and image reconstruction...
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6404842 |
Method and apparatus for image reconstruction in twin helical computed tomographic systems
A method for weighting projection data is provided. The method includes helically twin beam scanning an object at a selected pitch to acquire a first data sample from a first detector row and a...
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6400793 |
Detector for an X-ray computed tomography apparatus
A detector for an X-ray computed tomography apparatus has a number of detector elements separated from one another be septa forming a detector line. For improving the efficiency of the detector,...
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6400792 |
Method for measuring speed and high resolution information of moving object by high-speed X-ray CT, and its device
A single detector module is used both for CT imaging of two sections to measure the velocity of a moving object, and high spatial resolution measurement of a single section. A large number of...
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6393092 |
X-ray detection device and X-ray CT apparatus
In an X-ray detection device having an X-ray detection element array of photo diodes for multi channels arranged with a predetermined pitch on a substrate, a plurality of scintillators adhered onto...
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6389097 |
Multi-plate volumetric CT scanner gap compensation method and apparatus
A method and apparatus for configuring a large CT detector using a plurality of smaller X-ray type detector panels wherein the panels are sized and arranged in side by side fashion to extend across...
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6389096 |
Methods and apparatus for providing additional computed tomography imaging modes
In one aspect, the invention is a method for changing at least one of a number of image slices and in-plane resolutions available in an existing imaging system. The method includes steps of:...
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6385476 |
Method and apparatus for intracardially surveying a condition of a chamber of a heart
A condition, such as an electrical property, of a chamber of a heart is surveyed with a catheter having a condition sensor at its distal tip. A method for surveying the chamber includes the steps...
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6381298 |
Method of combining reconstruction images
Method and device for forming a 3D image of an object to be examined by combining at least two reconstruction images, acquired by an X-ray device, by weighted addition. Specifically, each...
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6370219 |
Self-modulated, filament-based, solid state laser
A self-modulated solid state laser comprises an intracavity optical waveguide that supports a multiplicity of lasing filaments each at a different optical frequency. At least two of the filaments...
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6370218 |
Methods and systems for determining x-ray beam position in multi-slice computed tomography scanners
Focal spot position determination systems having a high sensitivity to focal spot movement for use in connection with multi-slice computed tomography imaging systems are described. In one...
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6366638 |
Methods and apparatus for CT scout image processing
Methods and Apparatus for reducing image artifacts when reconstructing an image with a multislice computed tomographic (CT) imaging scanner are provided. Scout images are generated by obtaining a...
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6366637 |
Methods and apparatus for generating thin-slice imaging data on a multi-slice imaging system
A method for reducing slice thickness of a computed tomography imaging system including a source configured to direct an x-ray beam through an object toward a plurality of rows of detector elements...
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6362480 |
Radiation detector, particularly for a computed tomography apparatus
A radiation detector, particularly for a computed tomography apparatus, has a scintillator as well as a photodiode array allocated thereto, these being connected to measuring electronics via an...
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6359958 |
Methods and apparatus for Z-positioning an X-ray beam on a multi-slice detector
In one embodiment, the present invention is a method for positioning an x-ray beam on a multi-slice detector array of an imaging system in which the detector array has rows of detector elements and...
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6359955 |
Twin asymmetric scan slice thickness setting method and apparatus and radiation tomography method and apparatus
In order to allow slice thicknesses to be set for a twin asymmetric scan in which a scan is performed with a first slice thickness in a first detector row of a multi detector and with a second...
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6359957 |
Fet switching method and apparatus for multi-slice CT detector
A method and processor for running a pulse sequencing program to perform the method for use with a multi-slice CT system wherein the system includes detector elements arranged in rows for...
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