Narrow photon beam dosimetry for linear accelerator radiosurgery.
The dosimetric characteristics of linear accelerator radiosurgery for 10-MV X-ray were measured. Measurement of the relative output factor and tissue maximum ratio with a microchamber produced results equivalent to those of measurement with X-ray film. The 80% isodose level width measured with the microchamber was significantly smaller than that measured with the X-ray film. For the measurement of relative output factor and tissue maximum ratio, a microchamber seems to be the more appropriate choice. X-Ray film was found to be suitable for beam profile measurement.
Gotoh
S
S
Division of Radiological Technology, Nagasaki University School of Medicine, Japan.
Ochi
M
M
Hayashi
N
N
Matsushima
S
S
Uchida
T
T
Obata
S
S
Minami
K
K
Hayashi
K
K
Matsuo
T
T
Iwanaga
M
M
Yasunaga
A
A
Shibata
S
S
D019047:Phantoms, Imaging; D011829:Radiation Dosage; D016634:Radiosurgery / Q000295:instrumentation; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy