Energy response of agar-alanine free radical dosimetry to therapeutic electron beams.
Calculations of the energy response of an agar-alanine phantom dosimeter (AAPD) to electrons in the energy range of 0.15-20 MeV together with experimental results at 16 MeV are presented. It is shown that the sensitivity of the EPR dosimeter (EPR signal/Gray) is independent of alanine crystal size and varies less than 2%, in the electron energy range indicated. Thus, the measured free radical density distribution may be used directly as an indication of the absorbed dose distribution in an irradiated phantom.
Ciesielski
B
B
Brookhaven National Laboratory, SUNY-SB, Radiation Therapy Facility, Upton, New York 11973.
Reinstein
L E
LE
Meek
A G
AG
Wielopolski
L
L
D000362:Agar; D000409:Alanine; D055592:Biophysical Phenomena; D001703:Biophysics; D005609:Free Radicals; D006801:Humans; D008961:Models, Structural; D009369:Neoplasms / Q000532:radiotherapy; D011874:Radiometry / Q000706:statistics & numerical data; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000706:statistics & numerical data; D011882:Radiotherapy, High-Energy; D012680:Sensitivity and Specificity
D005609:Free Radicals; D000362:Agar; D000409:Alanine