A rapid method for electron beam energy check.
Assessment of electron beam energy and its long term stability is part of standard quality assurance practice in radiation oncology. Conventional depth-ionization or depth-film density measurements are time consuming both in terms of data acquisition and analysis. A procedure is described utilizing ionization measurements at two energy specific depths. It is based on a linear relationship between electron beam energy and its practical range. Energy shifts within the range covered by the two measurement depths are easily resolved. Within a range of +/- 0.50 MeV (+/- 1.30 MeV) around the established mean incident energy of 5.48 MeV (20.39 MeV), the method accuracy is better than 0.10 MeV.
Pisciotta
V J
VJ
Department of Radiation Oncology, University of Miami School of Medicine, Florida 33101.
Wu
X
X
Fiedler
J A
JA
Serago
C F
CF
Calish-Watzich
M L
ML
Schwade
J G
JG
Houdek
P V
PV
D004583:Electrons; D006801:Humans; D010315:Particle Accelerators; D011882:Radiotherapy, High-Energy / Q000592:standards*