Radiant energy – Source with recording detector – Using a stimulable phosphor
Patent
1995-10-24
1999-02-23
Glick, Edward J.
Radiant energy
Source with recording detector
Using a stimulable phosphor
250581, 250587, G01T 129, G03B 4202
Patent
active
058747435
ABSTRACT:
A method for verifying the modulation depth of a digital radiographic read out system. The system reads a radiation image by line-wise scanning a photostimulable phosphor screen that has been exposed to the radiation image. The radiation image includes an image of a phantom that has at least one x-ray opaque grating with parallel lines and a stepwise evolving spatial frequency. SWR values are determined by analyzing the x-ray image of the phantom. These SWR values are compared with acceptance values and the results of the comparison are used to adjust the scanning read out system.
REFERENCES:
patent: 3849650 (1974-11-01), Patten
patent: 5140418 (1992-08-01), Rivamonte
patent: 5420441 (1995-05-01), Newman et al.
Medical Physics, vol. 19, No. 4 Jul. 1992 NY, NY Dobbins, et al--"Direct Digitzation of Optical Images Using A Photostimulable Phosphor System" pp. 1071-1080 p. 1072, right col Ln 39, p. 1073--Left col Line 31.
Fernesh Und Kino Technik, vol. 43, No. 12 Dec. 1989 Heidelberg, DE--pp. 671-688. H. Malvedy--p. 671, right column, Ln 21 p. 672, lef col, Ln 21.
Jacobs Walter
Vuylsteke Pieter
AGFA-GEVAERT
Birch Richard J.
Glick Edward J.
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