[R50 and Rp in electron beam dosimetry].
The practical range Rp and the half-value depth R50 are relevant parameters in clinical dosimetry of electron beams. The aim of this study was to determine a relation between Rp and R50, as well as between Rp and the mean energy at the phantom surface Eo. A total of 135 depth-absorbed-dose curves from 20 different accelerators were analyzed. The relation between Rp and R50 could be fitted by a linear equation. This equation was compared with the equation calculated in the literature by means of Monte Carlo simulation. The prevailing data confirm that a linear relation exists between Rp and Eo.
Landesklinik für Radiotherapie und Radio-Onkologie, St. Johanns-Spital Salzburg.
Hassan
H
Rahim
D004583:Electrons / Q000627:therapeutic use*; D009010:Monte Carlo Method; D010315:Particle Accelerators; D019047:Phantoms, Imaging; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods