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9001961 Methods of scatter correction of X-ray projection data 1  
Embodiments of the disclosure generally set forth techniques for adjusting an estimate of scattered radiation of a target object. One example method includes generating a plurality of radiographic...
8938045 Method of determining reservoir properties and quality with multiple energy X-ray imaging  
A method of evaluating a reservoir includes a multi-energy X-ray CT scan of a sample, obtaining bulk density and photoelectric effect index effect for the sample, estimation of at least mineral...
8913711 Photon counting type X-ray computed tomography apparatus and method for correcting scattered radiation  
A CT apparatus includes: a tube that produces an X-ray photon whose highest energy is higher than highest peak energy of characteristic X-rays; a detecting material; a unit that produces a first...
8903045 Backscatter system with variable size of detector array  
A variable-geometry backscatter inspection system has a radiation detector array including one or more backscatter radiation detectors. The position of a second backscatter radiation detector is...
8873703 X ray imaging system with scatter radiation correction and method of using same  
A CT scanner with scatter correction device and a method for scatter correction are provided. The method comprises positioning shields for shielding some of the CT detector elements from direct X...
8787520 Radiation imaging device  
Disclosed is an X-ray imaging apparatus in which a correction function used to correct scattered X-rays and a correction function used to correct beam hardening can be simply and precisely...
8774350 X-ray CT device  
Scattered X-rays scattered by an object or a structure enter in a detector (a shift detector) for detecting the positional shift of an X-ray focal point and become a noise source, thereby...
8705827 Scatter correction methods  
Described herein are improved methods for correcting cone beam computed tomography signals to reduce scatter contamination contained therein. Generally, the improved methods involve generating a...
8699659 Systems and methods for focal spot motion correction  
Systems and methods for focal spot motion correction are provided. One system includes a radiation source configured to project radiation from a first focal spot onto an object and a plurality of...
8682055 Methods of scatter correction of x-ray projection data 2  
A system and method for forming an adjusted estimate of scattered radiation in a radiographic projection of a target object, which incorporates scattered radiation from objects adjacent to the...
8649587 Methods, systems, and computer-program products for estimating scattered radiation in radiographic projections  
Several related inventions for estimating scattered radiation in radiographic projections are disclosed. Several of the inventions use scatter kernels of various forms, including symmetric and...
8644577 Method for generating image data of an object under examination, projection data processing device, X-ray system and computer program  
A method is disclosed for generating image data of an object under examination from X-ray projection data of the object under examination, wherein, before a reconstruction of the image data, the...
8630472 Increased temporal resolution in the case of CT images by means of iterative view reconstruction with limiting conditions  
A method is disclosed for the reconstruction of image data of a moving object to be examined from measurement data, wherein the measurement data has previously been established in a relative...
8552858 Simulation and visualization of scattered radiation  
Scattered radiation has non-intuitive properties. A signalling system (28) is presented which provides a perceptible signal (34) being indicative of a predicted or measured spatial distribution of...
8515002 X-ray dark-field imaging system and method  
An x-ray imaging technology, performing an x-ray dark-field CT imaging of an examined object using an imaging system which comprises an x-ray source, two absorbing gratings G1 and G2, an x-ray...
8445851 Radioimaging  
Radioimaging methods, devices and radiopharmaceuticals therefor.
8421038 Methods and systems for protecting critical structures during radiation treatment  
Methods and systems are provided for protecting a critical structure during the administration of radiation treatment to a patient. A register receives proposed positions for one or more radiation...
8415630 Apparatus and methods for determining a boundary of an object for positron emission tomography scatter correction  
Apparatus and methods for determining a boundary of an object for positron emission tomography (PET) scatter correction are provided. One method includes obtaining positron emission tomography...
8391577 Radiation image processing apparatus, image processing method, X-ray radioscopy apparatus and control method thereof  
A radiation image processing apparatus which improves contrast and sharpness of radiation images is provided. According to this radiation image processing apparatus, comparison is made between a...
8326011 Methods, systems, and computer-program products for estimating scattered radiation in radiographic projections  
Several related inventions for estimating scattered radiation in radiographic projections are disclosed. Several of the inventions use scatter kernels of various forms, including symmetric and...
8320519 Multi-source encoded x-ray imaging  
A tomographic apparatus (10) includes at least two x-ray sources (16) that are concurrently driven with different switching patterns to generate uniquely encoded radiation. The tomographic...
8320518 Methods, apparatus, and computer-program products for increasing accuracy in cone-beam computed tomography  
Portions of the radiation source are obscured so that the radiation only passes through the specific areas of the patient related to the regions-of-interest to the doctor. Scattered radiation...
8290116 Imaging apparatus including correction unit for scattered radiation  
The present invention relates to an imaging apparatus for generating an image of a region of interest of an object. The imaging apparatus comprises a radiation source (2) for emitting radiation...
8284893 X-ray computer tomography apparatus and image processing apparatus  
An X-ray computer tomography apparatus includes an X-ray tube, an X-ray detector, a rotating mechanism, a reconstruction unit which reconstructs multislice or volume image data based on the...
8244016 Method for suppressing streak artifacts in images produced with an x-ray imaging system  
A method for reconstructing images from a set of acquired projection views weights the value backprojected into each image voxel depending on whether the backprojected raysum passes through a...
8218718 Radiotherapy and imaging methods and apparatus  
The present invention provides a method and an apparatus for reconstructing images from data acquired during radiotherapy. The approach is based on summing the imaging data acquired while both...
8199873 Methods of scatter correction of x-ray projection data 2  
A system and method for forming an adjusted estimate of scattered radiation in a radiographic projection of a target object, which incorporates scattered radiation from objects adjacent to the...
8199879 Methods of scatter correction of x-ray projection data 1  
A system and method for forming an adjusted estimate of scattered radiation in a radiographic projection of a target object, which incorporates scattered radiation from objects adjacent to the...
8184766 X-ray computer tomograph and method for investigating an object by means of X-ray computer tomography  
In an X-ray computer tomograph and a method for investigating an object by means of X-ray computer tomography, to improve the image quality, a first intensity of the X-ray radiation between an...
8184767 Imaging system and method with scatter correction  
An imaging technique is provided for acquiring scatter free images of an object. The technique includes acquiring a plurality of projection images of the object using a source and a detector...
8144829 Cone-beam CT imaging scheme  
A general imaging scheme is proposed for applications of CBCT. The approach provides a superior CBCT image quality by effective scatter correction and noise reduction. Specifically, in its...
8121249 Multi-parameter X-ray computed tomography  
The present invention relates to the field of x-ray imaging. More particularly, embodiments of the invention relate to methods, systems, and apparatus for imaging, which can be used in a wide...
8107589 Radiotherapeutic system and radiotherapeutic dose distribution measuring method  
A detector having a collimator in a position at a specific angle with respect to a therapeutic X-ray beam is mounted to selectively detect only scattering radiation in the direction. To...
8081732 Correcting transverse scattering in a multi-emitter CT scanner  
A multi-emitter computed tomography scanner is disclosed, including a plurality of x-ray emitter/detector arrangement pairs arranged offset at an angle to one another. In at least one embodiment,...
8077826 CT scanner with scatter radiation correction and method of using same  
A CT scanner with scatter correction device and a method for scatter correction are provided. The method of correcting CT images from artifacts caused by scattered radiation comprises affixing to...
8045676 Radiation imaging apparatus and processing method therefor  
A radiation imaging apparatus acquires information on a scattered radiation distribution at each rotation angle preliminarily determined for a rotation unit, based on images respectively obtained...
8009794 Methods, apparatus, and computer-program products for increasing accuracy in cone-beam computed tomography  
Disclosed are methods, systems, and computer-product programs for increasing accuracy in cone-beam computed tomography (CBCT) by obscuring portions of the radiation source so that the radiation...
8000435 Method and system for error compensation  
A method includes generating a plurality of scatter distributions based on geometric models having different object to detector distances, determining an imaged object to detector distance, and...
7957502 Method for scaling scattered ray intensity distribution in multi bulbs X-ray CT and multi bulbs X-ray CT apparatus  
A method for scaling a scattered ray intensity distribution in a multi bulbs X-ray CT apparatus configured to irradiate a subject with X-rays from a plurality of X-ray generation sections,...
7940885 Methods and apparatus for obtaining low-dose imaging  
In one aspect, A method of imaging an object of interest positioned in an exposure area is provided. The method comprises obtaining projection data of the object by providing radiation to the...
7920672 X-ray detector gain calibration depending on the fraction of scattered radiation  
It is described a gain calibration for a two-dimensional X-ray detector (315), in which the gain coefficients for scattered radiation (307b) and direct radiation (307a) are measured or estimated...
7916829 Computed tomography method  
The invention relates to a computed tomography method. The airgap associated with a projection direction is determined by determining, in the projection images, edge pixels which map object edges...
7912180 Scattered radiation correction method and scattered radiation correction apparatus  
Scattered radiation is estimated by using a reduced image generated from a projection image, and the scattered radiation image of the projection image is acquired by enlargement processing. The...
7907697 System to estimate X-ray scatter  
A system may include determination of a first scatter kernel based on a first energy, a material-equivalent radiological thickness and a first diameter, wherein the first scatter kernel is not a...
7860208 Scatter radiation correction in radiography and computed tomography employing flat panel detector  
In a method for correction of scatter radiation errors in radiography and computer tomography, using flat panel detectors, initially an estimation of a scatter radiation distribution Scor(y,z) is...
7835485 Method for scattered radiation correction in x-ray imaging devices  
A method is disclosed for scattered radiation correction in x-ray imaging devices having a number of x-ray sources that can be moved around an examination object in at least one scanning plane...
7820975 Achieving accurate time-of-flight calibrations with a stationary coincidence point source  
A method for calibrating an imaging system includes coincident detecting scatter radiation events from a calibration source located within a bore of the imaging system. The scatter radiation...
7807981 Data processing device, tomography apparatus for examination of an object of interest, method of examining an object of interest, computer-readable medium and program element  
A data processing device, comprising a plurality of emitter antennas arranged on a movable data acquisition device and adapted to emit electromagnetic radiation including data acquired by the...
7801266 Method for speeding up the scattered radiation correction in a computed tomography system  
The invention relates to a method for speeding up the scattered radiation correction in a computed tomography system with a radiation source and a detector constructed in large-area format with a...
7778384 Direct measuring and correction of scatter for CT  
Cone-beam CT scanners with large detector arrays suffer from increased scatter radiation. This radiation may cause severe image artefacts. An examination apparatus is provided which directly...
Matches 1 - 50 out of 173 1 2 3 4 >