An optical common-mode rejection for improving the sensitivity limit of a radiochromic imaging film

Hiroko Ohuchi, Ken Abe

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)576-579
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume558
Issue number2
DOIs
Publication statusPublished - 2006 Mar 15

Keywords

  • Common-mode
  • Dosimetry
  • Radiochromic
  • Scanner
  • Sensitivity

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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