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5245184 |
Transmission phantom for total performance assessment of scintillation camera imaging and method of manufacture
A transmission phantom for total performance assessment of scintillation camera imaging has a constant thickness and at least two layers of homogenous material each layer having different radiation...
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5245425 |
Method and apparatus for equalizing the gain of multi-channel systems in the presence of noise
Image restoration methods and systems include a comparison of the outputs of two or more adjacent detector element channels in order to determine the relative responsivities or conversion gains of...
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5237173 |
Gain calibration in a scintillation camera
The scintillation camera includes a plurality of individually pulsible light emitting devices associated with a number of the photomultiplier tubes. By pulsing the light emitting device, certain...
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5231461 |
Solar monochromator for filter calibration
A method and system for calibrating color filters employed in polychromatic imaging of a subject includes a scanning mirror (28), telescope (30), filters (104), and a detector array (60) employed...
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5229838 |
Photodetector amplitude linearity
To calibrate a photodetector, a rotating disk with a slot is disposed in a light beam with decreasing speed from a defined maximum rotational speed to a defined minimum speed, while magnitudes and...
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5227627 |
Animal body parts phantom
An animal body parts phantom comprised of a substrate sheet which is shaped in the form of an animal body part e.g. a thyroid, including a radioactive material substantially uniformly deposited on...
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5225979 |
Method and system for calibrating an x-ray scanner from the image of at least one calibration standard
A method and a system for calibrating an x-ray scanner, in which the lengths d ij of x-ray paths are first computed by means of the image of the calibration standard. There are then computed both...
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5221842 |
Self-contained calibrators/irradiators for personal dosimeters
A portable self contained calibrator/irradiator for calibrating large numbers of several types of personal dosimetry equipment includes a generally cylindrical housing having relatively heavy...
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5220840 |
Method of calibrating light output of a multi-lamp light fastness testing chamber
The light output of a multi-lamp lightfastness testing chamber defining a sample testing area in the chamber may be performed by sequentially turning on and off each lamp by itself, while measuring...
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5218202 |
Method for automatic drift stabilization in radiation measurement with a detector
A method for automatic drift stabilization in radiation measurement with a detector, a pulse amplitude integral of measured radiation being produced as a standard for the radiation energy absorbed...
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5218416 |
Irradiance calibration with solar diffuser
The sun's energy is used in combination of movable and fixed diffuser plates, windows and apertures which are positioned in a series of test sequences (modes) for reflectance monitoring and...
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5206511 |
Calibrators for infrared-type gas analyzers
A method of and device for calibrating infrared radiation transducers. A concentration factor representing the ratio of a data signal to a reference signal for a known concentration of a designated...
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5204733 |
Apparatus for calibrating an optical instrument, and applications thereof
To calibrate a radiometric optical instrument by means of a light source, the focal plane of the optical instrument containing photoelectric detectors which convert image brightness into an...
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5200622 |
Self-checked optronic system of infra-red observation and laser designation pod including such a system
A self-check electronic system for infra-red observation includes a hood having a first port transparent to infra-red radiation and a second port which is reflected through infra-red radiation and...
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5185526 |
Optical scene generator for testing infrared detector modules
An optical scene test generator is provided for testing the operation of detector modules designed to be placed in earth orbit. The OSTG includes first and second sources of infrared frequency...
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5184017 |
Method and apparatus for detecting a component gas in a sample
A non-dispersive infrared gas analyzer especially adapted for measuring the concentrations of HC, CO and CO 2 in a vehicle exhaust includes a sample chamber for holding a sample gas, a radiation...
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5183761 |
Method of making calibration solution for verifying calibration and linearity of vertical photometers
A method and device for calibrating or checking the calibration of vertical photometers. The invention may also provide easy and convenient assay results for diagnostic profiles. The invention...
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5182955 |
Borehole formation model for testing nuclear logging instruments
The borehole formation model is built by stacking in a spaced relationship selected glass plates to simulate the formation. Each glass plate has a circular hole in the center to simulate the oil or...
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5180917 |
Self-calibrating proportional counter
The invention relates to a method and an apparatus for qualifying the operation of a radiation (e.g. neutron) detector containing an ionizable gas (e.g. He 3 ), such as a detector disposed in a...
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5175432 |
Infrared detector module test system
A sensor test system is disclosed for testing the operation of infrared detector modules designed to be placed in earth orbit. The system includes an optical scene test generator (OSTG) for...
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5171986 |
Methods and apparatus for calibration of BGO scintillator gamma ray energy spectra
The energy-to-channel response of a bismuth germanate scintillator (BGO) gamma ray spectra measurement system is calibrated by use of the 10.2 MeV gamma ray peak originating from epithermal neutron...
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5166517 |
Method of testing the accuracy of pulse oximeters and device therefor
Device and method for testing the accuracy of pulse oximeters used in estimating arterial blood saturation levels. The device is for use in enabling a pulse oximeter to measure the absorption of...
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5164978 |
Test body and element for a scanning image reconstructing apparatus
The subject invention provides a means for testing the operating characteristics of an image reconstructing apparatus, the means including a high resolution gauge for determining the resolution of...
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5162655 |
Apparatus for calibrating radioactive detection instruments utilizing a beta-ray source within an aluminum mass
Apparatus for calibrating radiation detection instruments retains a beta radiation source, typically strontium 90, providing a known intensity of beta radiation in a safety shielded position within...
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5157255 |
Compact, thermally efficient focal plane array and testing and repair thereof
In a focal plane array sensor hybrid, a focal plane array fabricated in a chip of one semiconductor material and a read out circuit fabricated in one or more chips of a different semiconductor...
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5149965 |
Precision radiography scaling device
At least one radiopaque sphere of known dimensions with means for positioning same in a radiographic image field and a method for scaling radiographic images including straight AP and lateral views...
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5150394 |
Dual-energy system for quantitative radiographic imaging
A dual photon bone densitometry apparatus uses an area scanning technique to minimize scanning time. X-rays are generated by an x-ray source which pass through a region of a subject's body, forming...
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5149025 |
Detection of overheated railroad wheel and axle components
Overheated railroad journal bearings, wheels, and other wheel components on a moving or stationary railroad train are detected by amplifying the current signal from an infrared radiation sensor...
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RE34070 |
Method and system for transferring calibration data between calibrated measurement instruments
The present invention provides a method and system which is useful on instruments requiring experimentally determined calibration curves by which calibration data can be transferred to a plurality...
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5148233 |
Optical attenuator and optical power meter calibration systems with optical-pulse conversion and averaging
The invention is designed to calibrate a low-level optical power by a substitution method using a pulse generating section in which a light-shielding disk having a sectorial opening, as a component...
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5136165 |
Method and device for compensating for differences in sensitivities to incident radiation of a luminescent layer and a transducer
A luminescent layer is exposed to X-rays or gamma rays and whose luminescence is converted into an electric signal by a photo-electric transducer. Sensitivity variations of the combination formed...
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5128884 |
Black body calibration using image processing techniques
Techniques for calibrating differential temperature sources including the use of a calibrated infrared imaging sensor having an associated calibrated temperature function that is expressed as a...
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5122661 |
Method and apparatus for testing infrared radiation detectors
A unit for testing infrared radiation detection units which incorporate relay contacts that are readily rendered defective by increasing resistance through use, thereby rendering the infrared...
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5118943 |
Device for correcting the faults of a sequence of images analyzed by an integrating matrix infrared sensor
A device for correcting the faults of a sequence of images analyzed by an integrating matrix infrared sensor has a first part that determines a correction signal that is variable as a function of...
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5103092 |
Method and apparatus for detecting X-ray radiation
A method of and apparatus for radiation detection including temperature control so that the temperature of the radiation detector, which includes a photodiode with a leakage current of 0.4-18 pA,...
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5101271 |
Image restoration and faulty sensor detection and compensation system and process
A scene-based image restoration system, method and apparatus calculates a plurality of restoration signals to be combined with a plurality of input signals to produce resultant signals that are...
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5090576 |
Method and apparatus for sorting a flow of objects as a function of optical properties of the objects
Method and apparatus for sorting objects dependent on optical characteristics thereof. The objects are conveyed through a longitudinal sorting zone. Light reflected from the objects passing the...
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5089749 |
Method and apparatus for measuring output of a heat lamp for an optical TLD reader
A method and apparatus for measuring and adjusting output of a heat lamp for an optical TLD reader includes an optical system which matches the optical system of the TLD reader, means for...
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5089706 |
Method and apparatus for producing a quench calibration function for a liquid scintillation counter
To produce a quench calibration function for a liquid scintillation counter having stored a basic correlation between a quantity to be quench calibrated and a quench index, the value of the...
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5073712 |
Light scanner web profile measurement apparatus and method
A method and apparatus provide for determining properties of a web of traveling sheet material by scanning light including at least selected wavelengths such as IR and/or visible wavelengths across...
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5072115 |
Interpretation of mass spectra of multiply charged ions of mixtures
A chemical mixture is conveyed to a multiple charging apparatus, where multiply charged ions are formed. The multiply charged ions are then conveyed to a mass spectrometer which generates...
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5070239 |
Night vision goggle ambient illumination testing
A night vision goggle capability evaluation apparatus useful in assessing the degree of illumination present in a proposed NVG operating environment is disclosed. The evaluation apparatus includes...
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5068536 |
Method for providing custom calibration for near infrared instruments for measurement of blood glucose
A method is disclosed for easily and reliably custom calibrating near-infrared quantitative analysis instruments including obtaining a plurality of blood samples and blood glucose level...
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5056130 |
Computerized tomography calibrator
A set of interchangeable pieces comprising a computerized tomography calibrator, and a method of use thereof, permits focusing of a computerized tomographic (CT) system. The interchangeable pieces...
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5055687 |
Single photon emission CT apparatus
A single-photon emission computed tomography (SPECT) apparatus for detecting gamma rays emitted from a radioisotope given to a body to be examined, including three focus collimators and...
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5051583 |
Atmospheric pressure ionization type mass spectrometer
An atmospheric pressure ionization type mass spectrometer comprises an ionization section opened to the atmosphere including a desolvation chamber, an ionization chamber, and a corona discharge...
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5050196 |
Radiation gauge
An X-ray aligner provided with a radiation gauge for detecting an intensity of the X-ray radiation. The sensitivity of the radiation gauge is influenced by the passed exposure, the passed...
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5043586 |
Planarized, reusable calibration grids
An improved structure for electron beam lithography grids and a method of fabricating such grids yields calibration grids having grid lines coplanar with the surface of a the grid body and...
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5034606 |
Method and apparatus for calibrating line spectrum irradiance
A method and apparatus for measuring a single-wavelength irradiance employ (1) a reference photosensor unit combining a photodiode having an absolute response at a given wavelength calibrated by a...
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5032719 |
Source range field calibration fixture
A portable dosimeter calibration device has a shielded container with a cover, and providing a cavity in which dosimeters may be spaced about a central shielded compartment. An elongated carrier...
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