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Evaluation of optically projected x‐ray images from an elastomer‐based ionographic system
Author(s) -
Jani Shirish K.,
Fatouros Panos P.,
Walton Philip W.
Publication year - 1983
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.595277
Subject(s) - materials science , elastomer , foil method , sensitivity (control systems) , image resolution , resolution (logic) , optics , voltage , enhanced data rates for gsm evolution , electrode , deformation (meteorology) , x ray , dielectric , optoelectronics , composite material , physics , computer science , electronic engineering , quantum mechanics , artificial intelligence , engineering , telecommunications
In ionographic imaging, the ions produced in a high‐pressure, high‐ Z gas are normally collected on an insulating foil. If a deformable dielectric gel is used as a collecting electrode, then the electrostatic image can be visualized by optically projecting the get deformation onto a screen. In the present work, we have evaluated the imaging performance of such an ionographic system in terms of its sensitivity and resolution capabilities. X‐ray images of a sharp lead edge formed on a thin silicone elastomer were optically projected and recorded on x‐ray films. The edge profiles were obtained at different values of x‐ray exposure, elastomer thickness, gas pressure, and collecting voltage across the chamber. These profiles were processed to obtain the sensitivity and resolution of the system at different operating conditions. Images of some test objects are shown using this system in order to demonstrate its clinical potential.