Dosimetric evaluation of a variable energy superficial X-ray machine with applications for endocavitary radiotherapy techniques.
This investigation presents the beam characteristics of a newly-marketed variable energy superficial X ray machine for radiotherapy. The X ray system hardware, including a high voltage generator, and console software allow for nine independent operator-selected X ray beams from 10-150 kVp. Filament current values are also independently variable; 1.0-13.0 mA for 90-150 kVp, and 1.0-30.0 mA for 10-90 kVp. The HVL's, effective energies, and radiation outputs for the nine combinations of kVp and mA are presented. In addition, percentage depth dose and beam uniformity results are presented as a function of cone size. Radiation output stability and reproducibility results are included. Discussion of adaptation of this X ray system to the Papillon technique for the treatment of rectal cancers is presented.
Coffey
C W
CW
Department of Radiation Medicine, University of Kentucky Medical Center, Lexington 40536.
Morris
R
R
Martin
J
J
Maruyama
Y
Y
D001918:Brachytherapy / Q000295:instrumentation*; D006801:Humans; D011878:Radiotherapy / Q000295:instrumentation*; D011879:Radiotherapy Dosage; D012004:Rectal Neoplasms / Q000532:radiotherapy