A microdosimetric characterization of a cyclotron-produced therapeutic neutron beam
- 1 November 1987
- journal article
- research article
- Published by Wiley in Medical Physics
- Vol. 14 (6) , 1015-1019
- https://doi.org/10.1118/1.595979
Abstract
The therapeutic neutron beam of the Cyclotron Corporation''s CP-42 negative-ion cyclotron is generated by protons of 42 MeV bombarding a thin beryllium target. Microdosimetric measurements were made for this neutron beam in a full-scatter water phantom at nine positions inside and outside the useful beam. The linear energy distributions and the variations of dose-mean, frequency-mean, and saturated lineal energy are compared for these positions. The dose fraction due to gamma rays is also calculated at each of these positions, based upon previously published techniques. A theoretical relative biologic effectiveness, based upon the dual radiation action model of Kellerer and Rossi [Curr. Top. Radiat. Res. 8, 85 (1972)] is also shown for the positions of measurement.Funding Information
- National Cancer Institute (CA-06294, CM-N01-2531)
This publication has 4 references indexed in Scilit:
- Correlation of microdosimetric measurements with relative biological effectiveness from clinical experience for two neutron therapy beamsMedical Physics, 1986
- Neutron dose equivalent next to the target shield of a neutron therapy facility using an LET counterMedical Physics, 1981
- Microdosimetric investigations on collimated fast-neutron beams for radiation therapy. I. Measurements of microdosimetric spectra and particle dose fractions in a water phantom for fast neutrons from 14 MeV deuterons on berylliumPhysics in Medicine & Biology, 1981
- Microdosimetric Measurements of Ionization by Monoenergetic PhotonsRadiation Research, 1978