Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1988-09-30
1991-06-04
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
25036301, 25036302, 25036304, 25036306, 25036309, G01T 1163, G01T 1167
Patent
active
050216678
ABSTRACT:
A movable calibration collimator for a radionuclide emission tomography camera, and a calibration system using same, having a wall of material which is opaque to radionuclide emissions and is movable in a first direction relative to the camera. One or more patterns of openings are defined by the wall to pass radionuclide emissions. The openings of each pattern are aligned in a direction transverse to the first direction to provide an array of camera images upon movement of the wall relative to the camera. The number of images generated for the array are greater than the number of openings. A method of using such a calibration collimator to perform linearity correction involves installing the calibration collimator and a line source of radionuclide emissions, acquiring a camera image of the pattern of openings, and incrementing the calibration collimator for a desired number of increments. Each camera image, collected at each position of the collimator, has a position image for each opening. The camera images are combined to produce an array having a greater number of position images than the numbers of openings. Position estimation made by the camera is corrected based on the correlation between the location of the position images and the position of the openings.
REFERENCES:
patent: 4095107 (1978-06-01), Genna et al.
patent: 4228515 (1980-10-01), Genna et al.
patent: 4408124 (1983-10-01), Paras
patent: 4507733 (1985-03-01), Blum
patent: 4584478 (1986-04-01), Genna et al.
patent: 4593198 (1986-06-01), Pang et al.
patent: 4873632 (1989-10-01), Logan et al.
"Acquisition and Colibration Principles for ASPECT," IEEE Transactions on Nuclear Science, vol. 35, No. 1, 2/88 by Smith & Genna.
"Spectral-Spatial-Sensitivity Distortion Trands and an Accurate Correction Method in Scintillation Gamma Cameras", King et al., IEEE, Feb. 85, pp. 870-874.
Genna Sebastian
Smith Andrew P.
Digital Scintigraphics, Inc.
Eisenberg Jacob M.
Hannaher Constantine
Iandiorio Joseph S.
LandOfFree
Movable calibration collimator and system and method using same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Movable calibration collimator and system and method using same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Movable calibration collimator and system and method using same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1028462