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4315157 |
Multiple beam computed tomography (CT) scanner
A multiple beam computed tomography (CT) scanner formed of plural interspaced groups of small, densely packed radiation detectors provided in a stationary ring around a body. The ring defines the...
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4306155 |
Gas-filled x-ray detector with improved window
A multicell x-ray detector of the gas-filled ionization type includes a metal body in which the front, rear, end and bottom walls together with a sealed cover define a channel in which there is a...
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4303863 |
Tomographic scanning apparatus with ionization detector means
An axial tomography system is disclosed which includes an assembly rotatable about an axis extending along a central opening defined therein, and means for positioning the body portion to be...
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4301368 |
Ionizing radiation detector adapted for use with tomography systems
An improved ionizing radiation detector functioning in a proportional chamber mode, for use with X-ray tomography systems, is disclosed. The detector includes an elongated housing enclosing a...
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4298800 |
Tomographic apparatus and method for obtaining three-dimensional information by radiation scanning
Apparatus for scanning a part or all of a patient by X-rays or gamma rays to obtain two or three dimensional information. The apparatus comprises a fan beam source of radiation which is moveable...
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4297576 |
Device for the interconnection of conductive terminals located within a demountable enclosure and conductive terminals located outside said enclosure
Conductive terminals located within a casing constituted by two separable portions and conductive terminals located outside the casing are interconnected by means of conductors which pass through...
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4292525 |
Diagnostic radiology apparatus for producing layer images of an examination subject
In an exemplary embodiment, a measuring arrangement comprises a radiation source emitting a radiation beam which penetrates the body layer to be examined, and a radiation receiver which supplies...
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4292524 |
Examining device for determining local absorption values in a slice of a body
In transversal tomography devices in which the X-ray beam and the array of detectors are such that they cover the higher slice to be examined, a very large array dynamic range (the ratio between...
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4289969 |
Radiation imaging apparatus
Radiation imaging apparatus especially suited for use in a computerized tomographic (CT) scanner employs an array of discrete X-ray sources, each being a cold cathode diode and an adjacent fixed...
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4288264 |
Detector construction
Methods for constructing radiation sensitive detectors are described. In one method, distinct layers of optical cement and plastics material are disposed between a semiconductor photodiode and a...
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4286156 |
Device for determining the spatial absorption distribution in a plane of examination
The device in accordance with the invention comprises detectors, a first part of which is not struck by radiation during measurement of the useful signal, whilst a second part which is struck...
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4278889 |
Current amplifier with automatic drift correction for tomographic scanners
The current amplifier with automatic drift correction is designed for use in conjunction with computerized tomographic scanners or other apparatus. The amplifier comprises a differential amplifier...
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4277685 |
Adjustable collimator
In a rotating fan beam tomographic scanner there is included an adjustable collimator and shutter assembly. The assembly includes a fan angle collimation cylinder having a plurality of different...
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4274005 |
X-ray apparatus for computed tomography scanner
In an X-ray apparatus for a computed tomography scanner, a plurality of combined X-ray tube segments are arranged round the central axis of the apparatus on which a subject to be examined is...
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RE30644 |
X-ray detector
An ionization chamber for use in determining the spatial distribution of x-ray photons in tomography systems comprises a plurality of substantially parallel, planar anodes separated by parallel,...
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4262202 |
Scintillator detector array
A scintillator detector array particularly useful in computerized tomography comprises a housing including a plurality of walled cellular chambers, said housing having a front wall member...
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4260891 |
Radiation detectors
In gas detectors, such as may be used in computerized tomographic (CT) apparatus, it is necessary to provide electrical connections into the pressure vessel. Conventionally, these are by ceramic...
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4260894 |
Optimum dose tomography scanning system
A tomography scanning system in which the intensity of radiation for each exposure is adjusted to obtain at the system detectors a minimum signal which results in a desired minimum signal-to-noise...
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4260895 |
Radiation diagnostic apparatus for generating tomographic images
In an exemplary embodiment, a radiation source emits a radiation beam for penetrating the layer to be examined from different directions. A radiation receiver supplies electric output signals...
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4259584 |
Apparatus for transmitting signals
In the exemplary embodiments, a ring made of light-conductive material curved around the center of rotation is provided, onto the surface of which a light source radiates, which emits light signals...
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4255659 |
Semiconductor radiation detector
An electrical charge amplifier including a filter circuit is AC coupled to a semiconductor (CdTe) detector and generates a voltage pulse in response to an electrical charge generated in the...
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4253024 |
Radiation detection device
A radiation detection device comprising a housing which comprises an entrance window and in which at least one ionization chamber detector is arranged. The detector comprises a flat high-voltage...
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4247774 |
Simultaneous dual-energy computer assisted tomography
A dual-energy detector system for use in computer assisted tomography. This system produces two independent sets of information from one scan, namely, high-energy and low-energy data. The system...
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4241404 |
Device for computed tomography
For determining the absorption distribution in a plane of a body by means of a fan of radiation beams from an approximately point-shaped radiation source and in different positions of the body with...
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4236080 |
X-ray apparatus for computed tomography
X-ray apparatus for computer tomography. Strip-shaped visible images which correspond to the individual X-ray exposures in one image plane are transferred to the light-sensitive input of an image...
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4234792 |
Scintillator crystal radiation detector
A radiation detector, particularly suitable for use in computerized tomographic scanning systems, comprising a scintillator crystal having one window surface optically connected with a...
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4227082 |
Detector for detecting ionizing radiation
The detector comprises at least one plate of an electrooptical material having good photoconduction properties and high absorption of X- or γ-rays, preferably materials comprising bismuth oxide....
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4220860 |
Tomographic scanner with cadmium tungstate scintillation crystals
A radiation detector suitable for use in tomographic scanners comprising at least one cadmium tungstate scintillation crystal optically coupled with a silicon photodiode or other photoelectric...
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4220863 |
Data channel multiplexing system for CT scanner with rotating source
A CT scanner has an outer circular array of stationary radiation detectors for an inner concentrically revolving source of radiation emitted in a fan pattern subtending a number of the detectors. A...
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4206362 |
Medical radiographic apparatus
In a computerized tomography (CT) apparatus, in which a fan-shaped X-ray distribution is rotated around the body of a patient, it is possible to use a ring of non-rotating detectors disposed to...
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4204124 |
Device for measuring radiation absorption in a three-dimensional object
A device for reconstructing the absorption distribution in a three-dimensional body. The body to be examined is imaged from two groups of radiation source positions. Each group of radiation source...
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4196352 |
Multiple purpose high speed tomographic x-ray scanner
A multiple source, rotating, tomographic x-ray scanner includes x-ray sources adaptably configurable to operate in two modes. The first mode of operation, in which the sources are planarly...
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4193000 |
Radiation detector adapted for use with a scanner
A compact single- or multi-channel radiation detector capable of sending forth a large and stable output signal by being operated in a proportional region which comprises a single or a plurality of...
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4193001 |
Tomographic apparatus for producing transverse layer images
A computer-tomograph having a fan-shaped x-ray beam and two detector arrays. The two detector arrays are arranged in parallel with one another and side by side. Their lengths are dimensioned such...
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4190771 |
Radiation detection element
A radiation detection element comprises an insulating base frame having a pair of leg portions with a spacing left therebetween, a pair of electroconductive members each disposed on one surface of...
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4187430 |
Tomograph for the production of transverse layer images
A computer tomograph with a fan-shaped x-ray beam and two detector arrays. The two detector arrays are arranged in parallel and adjacent one another. Their lengths are dimensioned such that one...
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4187427 |
Structure for collimated scintillation detectors useful in tomography
Structures for containing and supporting scintillator bodies are disclosed in which the optical output of the scintillator body is channeled by light reflective means to photoelectrically...
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4185195 |
Construction of collimators and/or detectors for penetrating radiation
A method of constructing arrays of collimators and/or detectors for penetrating radiation is described. A tape or foil is wound alternatively over and under rods provided in upper and lower sets to...
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4181856 |
Arrangements for detectors of radiation
An ionizing radiation detector arrangement includes scintillator crystals and respective photodiodes of elongate form and mountings to assemble these in sub-arrays of, for example, four, units. The...
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4180737 |
X-ray detector
A solid state x-ray detector has a scintillator element converting x-ray flux to fluorescence photons, a photosensor detecting the x-ray induced fluorescence of the scintillator, and collimator...
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4179100 |
Radiography apparatus
Radiography apparatus including radiation generating means, collimator means interposed between the radiation generating means and an object to be exposed to radiation, scintillator means disposed...
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4176280 |
Tomographic x-ray apparatus for producing transverse layer images
In the illustrated embodiments, detectors for receiving a fan-shaped beam are arranged in one row with dimensions to resolve a layer of maximum extent, while further detectors of the same...
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4176279 |
Tomograph for producing transverse layer images
In an illustrated embodiment, the fan shaped beam of penetrating radiation has a central ray directed offcenter relative to a row of detectors e.g. by a distance corresponding to one-fourth the...
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4166957 |
Apparatus and method for producing a sectional view of a body
An improved apparatus and method for producing a sectional view of a body in a short time in which rays such as X-rays or gamma rays are directed in a fan shaped beam through a cross section plane...
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4164657 |
Apparatus for tomography
An apparatus for tomography, comprising an X-ray or gamma-ray source, at least one detector, and an image reconstruction apparatus. The detector is a spatially two-dimensional, continuous detector...
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4163152 |
Pencil-shaped radiation detection ionization chamber
A radiation detection ionization chamber comprising an elongated cylindrical pencil-shaped tubing forming an outer wall of the chamber and a center electrode disposed along the major axis of the...
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4161655 |
Multi-cell detector using printed circuit board
An array of electrode plates are arranged in parallel and spaced apart relationship to define ionization cells in a channel within a housing that is occupied by high pressured gas. A broad beam of...
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4160911 |
Fan beam CT apparatus the interbeam angle of which varies with position across the fan
A computerized tomographic apparatus is described in which the source produces a fan-shaped distribution of X-rays and the detectors extend across the distribution so as to respectively receive...
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4160167 |
Device for measuring the absorption of radiation in a slice of a body
In third generation computer tomography apparatus, wherein radiation behind the object is measured by means of a large number of detection elements, a detection device comprises a number of...
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4160165 |
X-ray detecting system having negative feedback for gain stabilization
An X-ray detecting system includes a number of X-ray detectors mounted on the periphery of a vertical ring rotatable about a patient to be scanned diametrically opposite from an X-ray tube, slit...
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