Open AccessSimplified method for creating a density-absorbed dose calibration curve for the low dose range from Gafchromic EBT3 film
Author(s) -
Tatsuhiro Gotanda,
Toshizo Katsuda,
Rumi Gotanda,
Tadao Kuwano,
Takuya Akagawa,
Nobuyoshi Tanki,
Akihiko Tabuchi,
Tetsunori Shimono,
Yasuyuki Kawaji
Publication year - 2016
Publication title -
journal of medical physics/journal of medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.292
H-Index - 24
eISSN - 1998-3913
pISSN - 0971-6203
DOI - 10.4103/0971-6203.195192
Subject(s) - absorbed dose , calibration curve , dosimeter , calibration , dosimetry , materials science , range (aeronautics) , ionization chamber , optics , ionization , nuclear medicine , physics , mathematics , statistics , detection limit , medicine , ion , quantum mechanics , composite material
Radiochromic film dosimeters have a disadvantage in comparison with an ionization chamber in that the dosimetry process is time-consuming for creating a density-absorbed dose calibration curve. The purpose of this study was the development of a simplified method of creating a density-absorbed dose calibration curve from radiochromic film within a short time. This simplified method was performed using Gafchromic EBT3 film with a low energy dependence and step-shaped Al filter. The simplified method was compared with the standard method. The density-absorbed dose calibration curves created using the simplified and standard methods exhibited approximately similar straight lines, and the gradients of the density-absorbed dose calibration curves were -32.336 and -33.746, respectively. The simplified method can obtain calibration curves within a much shorter time compared to the standard method. It is considered that the simplified method for EBT3 film offers a more time-efficient means of determining the density-absorbed dose calibration curve within a low absorbed dose range such as the diagnostic range.