Measurement of beam-axis displacement from the isocenter during three-dimensional conformal radiosurgery with a micro-multileaf collimator.
We describe the displacement of the beam-axis from the planning isocenter in clinical situations during three-dimensional conformal radiosurgery using an Acculeaf bi-directional micro-multileaf collimator. The displacements were recorded for 64 ports using a video imaging system and a stereotactic arc. The mean displacement was 0.41+/-0.25 mm.
Kunieda
Etsuo
E
Department of Radiology and Neurosurgery, Keio University, 35 Shinanomachi, Shinjuku, Tokyo 160-8582, Japan.
Kawaguchi
Osamu
O
Saitoh
Hidetoshi
H
Fujisaki
Tatsuya
T
Takeda
Atsuya
A
Kawase
Takatsugu
T
Deloar
Hossain M
HM
Shigematsu
Naoyuki
N
Kubo
Atsushi
A
D001932:Brain Neoplasms / Q000601:surgery; D006801:Humans; D021621:Imaging, Three-Dimensional; D016634:Radiosurgery / Q000295:instrumentation*; D020266:Radiotherapy, Conformal / Q000295:instrumentation / Q000379:methods*; D013238:Stereotaxic Techniques