Abstract
Optical computed tomography (CT) scanners can measure attenuation in large-volume radiochromic dosimeters. Scattered light within the dosimeters is the major factor limiting dynamic range. Scattered light limits the use of large volume polymerization gels for small field dosimetry with broad-beam scanning geometries. Planar and single ray scanning geometries generate and accept less stray light due to scatter in the dosimeter. Transparent, radiochromic dosimeters provide higher dynamic range for accurate transmission imaging. X-ray CT scanning is applicable for large volume polymerization gel dosimeters.
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