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Magnetic enhancement of electron dose distribution in a phantom
Author(s) -
Whitmire Daniel P.,
Bernard Davy L.,
Peterson Mary D.,
Purdy James A.
Publication year - 1977
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594309
Subject(s) - imaging phantom , dosimetry , electron , physics , materials science , medical physics , nuclear magnetic resonance , optics , nuclear medicine , medicine , nuclear physics
We have measured the effect of a 10‐kG magnetic field on the dose distribution of electrons in a polystyrene phantom. Isodensity plots and depth‐dose curves are presented for 22‐ and 28‐MeV electron beams with and without the magnetic field applied. The measurements show that magnetic fields as low as 10 kG can produce a substantial modification of the absorbed dose distribution. When compared with the zero‐magnetic‐field distribution of the same energy, the magnetic field significantly improves the D max ‐surface dose ratio and increases the fall off in dose past the D max region.