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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...
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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...
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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...
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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 range...
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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...
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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,...
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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...
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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...
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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...
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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...
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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,...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 events...
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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...
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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...
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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...
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7753586 |
Radiation imaging apparatus
A grid 3 arranged with a scattered radiation shielding plate 31 for each column is arranged at a front face of a radiation detector 2. The distance between the grid 3 and the radiation detector 2...
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7751525 |
Method for correcting x-ray scatter in projection radiography and computer tomography
The invention relates to a method for correcting x-ray scatter in projection radiography or in x-ray computer tomography, in which, for different observed objects, different scatter-correction...
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7680241 |
Multi-tube imaging system scatter correction
A computed tomography reconstruction method includes concurrently emitting radiation from at least two x-ray sources (14), switching the output state of each of the at least two x-ray sources (14)...
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7660381 |
Scatter compensation in an X-ray system
Scatter compensation is achieved in an X-ray imaging system by providing collimation means in the form of shutters (12) to collimate the primary X-ray beam (1) such that the radiation (8)...
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7636415 |
Method for producing tomographic pictures with the aid of an X-ray computed tomography system with scattered radiation correction
A method and an X-ray CT system are disclosed for producing tomographic pictures with the aid of an X-ray CT system including at least two X-ray sources arranged on a gantry with an angular offset...
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7626174 |
X-ray detector with correction for scattered radiation
The invention refers to X-ray devices, an X-ray detector and a method of correcting intensity signals. An X-ray detector then comprises for determining the intensity of X-rays, which comprise a...
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7623618 |
Method for scattered radiation correction in X-ray imaging, and X-ray imaging system for this purpose
The present invention relates to a method for scattered radiation correction in X-ray imaging, and to an X-ray imaging system for carrying out the method. In the method, measurement signals t from...
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7623617 |
Method for scattered radiation correction of a CT system having at least two focus/detector systems arranged with an angular offset, and a CT system
A method is disclosed for scattered radiation detection and/or for scattered radiation correction. In at least one embodiment, each radiation produced is provided with an individual temporal...
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7580499 |
Coherent-scatter computed tomography
Known reconstruction techniques from coherent scattered x-rays apply non-exact reconstruction techniques. According to the present invention, a relatively wide spectrum of wave-vector transfers q...
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7570732 |
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...
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7564938 |
Scatter rejection for composite medical imaging systems
Scatter effects are reduced in a radiographic imaging device, such as a digital slot scan mammographic imaging device, by reducing detected scatter and processing detector information to compensate...
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7535987 |
X-ray CT apparatus
An X-ray CT apparatus includes a plurality of X-ray tubes, a plurality of X-ray detectors corresponding to the plurality of X-ray tubes, respectively, a support mechanism which supports the X-ray...
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7519143 |
Method and system for generating a scatter corrected X-ray image
A Digital Radiograph (DR) acquisition system for generating a scatter-corrected X-ray image is provided. The DR acquisition system includes a digital detector configured to produce a...
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7502437 |
Focused coherent-scatter computer tomography
Due to the provision of slit collimators an intensity of a fan beam is reduced significantly such that expensive high power x-ray tubes have to be used. According to an exemplary embodiment of the...
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7496171 |
Method for estimating the radiation scattered in a two-dimensional detector
The radiation scattered in a two-dimensional detector (2) by a radiation is estimated by subjecting the detector (2) to at least two irradiations by inserting an array (3) of separated absorbers...
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7493001 |
Waveguide-based detector module for x-radiation or gamma radiation
A detector module, in at least one embodiment, is disclosed for x-radiation or gamma radiation that includes one or more optical waveguide sections that are arranged next to one another in order to...
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7486760 |
Compact systems and methods for generating a diffraction profile
An imaging system for generating a diffraction profile is described. The imaging system includes a gantry including an x-ray imaging system configured to generate an x-ray image of a substance and...
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7486773 |
Megavoltage scatter radiation measurement using beam stop array
A system may include emission of megavoltage radiation from a megavoltage radiation source, acquisition of a first image using an imaging device while first megavoltage radiation is emitted from...
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7474728 |
Computed tomography apparatus
The invention relates to a computed tomography apparatus (CT apparatus) for imaging by means of radiation having traversed an object to be examined (that is, directly transmitted radiation), as...
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7471759 |
Method for estimating the scattered radiation in X-ray tomography
The method is analytical, involves a single irradiation of the object at a plurality of incidences in order to obtain a first three-dimensional image of the total radiation received by the...
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7462832 |
Device and method for computer tomography
A device and a method for computer tomography are described, in which an uncorrected volume image and a correction volume image are overlaid by the user after selection of a weighting function....
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7463712 |
Scatter correction for x-ray imaging using modulation of primary x-ray spatial spectrum
Scatter radiation in an x-ray imaging system including an x-ray source and an x-ray detector is separated by using amplitude modulation to translate the spatial frequency of a detected x-ray beam...
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7443945 |
Method for scattered radiation correction in the case of an X-ray CT, and X-ray CT for applying this method
It is proposed to estimate the scattered radiation on the basis of a sinogram, which is measured in any case. In at least one embodiment, a method includes determining the potential scattering site...
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7440536 |
Method for scattered radiation correction of a CT system
A method for scattered radiation correction of a CT system, including at least two focus/detector systems operated angularly offset from one another, is disclosed. In the method, at at least one...
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7409034 |
Radiation tomography apparatus
An apparatus for improving the tomographic image quality by preventing the tomographic image contrast from degrading and preventing artifact from occurring even if many scattered radiations occur....
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7396162 |
Scatter correction for CT method and apparatus
A method, system, and machine readable media are provided for correcting scatter in an image. The method comprises sequentially emitting radiation from a subset of radiation sources toward a...
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7372936 |
Radiation computed tomography apparatus and tomographic image data generating method
A radiation computed tomography apparatus that includes a radiation detector having a plurality of radiation detector elements arranged in a two-dimensional manner for detecting radiation passing...
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7366279 |
Scatter control system and method for computed tomography
Various configurations for scatter reduction and control are provided for CT imaging. These configurations include an imaging system having a stationary detector extending generally around a...
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