TY - JOUR
T1 - An optical common-mode rejection for improving the sensitivity limit of a radiochromic imaging film
AU - Ohuchi, Hiroko
AU - Abe, Ken
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/3/15
Y1 - 2006/3/15
N2 - We found out that the dosimetric sensitivity limit of a radiochromic film can be much improved through use of a set of color components, e.g. red R and green G, outputs from an RGB color scanner. The two light component lights suffer a common fate, with the exception of wavelength-dependent events, having passed together along common attenuation paths. The mathematical operation of creating a ratio of the two components (R:G) is analogous to the 'common-mode rejection' (CMR) in electronics. In the case of the GAFCHROMIC films, HS-14 and MD-55-2, the detection limit was found to be greatly improved with optical CMR, and the lowest detectable dose attained was 20 mGy for HS-14 and 50 mGy for MD-55-2.
AB - We found out that the dosimetric sensitivity limit of a radiochromic film can be much improved through use of a set of color components, e.g. red R and green G, outputs from an RGB color scanner. The two light component lights suffer a common fate, with the exception of wavelength-dependent events, having passed together along common attenuation paths. The mathematical operation of creating a ratio of the two components (R:G) is analogous to the 'common-mode rejection' (CMR) in electronics. In the case of the GAFCHROMIC films, HS-14 and MD-55-2, the detection limit was found to be greatly improved with optical CMR, and the lowest detectable dose attained was 20 mGy for HS-14 and 50 mGy for MD-55-2.
KW - Common-mode
KW - Dosimetry
KW - Radiochromic
KW - Scanner
KW - Sensitivity
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U2 - 10.1016/j.nima.2005.11.253
DO - 10.1016/j.nima.2005.11.253
M3 - Article
AN - SCOPUS:33644548935
SN - 0168-9002
VL - 558
SP - 576
EP - 579
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 2
ER -