Dosimetric Characteristics of the KCCH Neutron Therapy Facility.
- Author:
Seong Yul YOO
1
;
Sung Woo NOH
;
Hyun Woo CHUNG
;
Chul Koo CHO
;
Kyoung Hwan KOH
;
Joo Shik BAK
;
Juri EENMAA
Author Information
1. Laboratory of Cyclotron Korea Cancer Center Hospital, Korea.
- Publication Type:Original Article
- Keywords:
Neutron Beam;
Dosimetry;
cyclotron;
Tissue equivalent chamber;
Depth dose;
Build-up;
profile;
Isodose curve;
Output
- MeSH:
Cyclotrons;
Neutrons*
- From:Journal of the Korean Society for Therapeutic Radiology
1988;6(1):85-92
- CountryRepublic of Korea
- Language:English
-
Abstract:
For the physical characterization of neutron beam, dosimetric measurements had been performed to obtain physical data of KCCH cyclotron-produced neutrons for clinical use. The results are presented and compared with the data of other institutions from the literatures. The central aixs percent depth dose, build-up curves and open and wedge isodose curve values are intermediate between that of a 4 and 6 MV X-ray. The build-up level of maximum dose was at 1.35 cm and entrance dose was approximately 40%. Flatness of the beam was 9% at Dmax and less than+/-3% at the depth of 80% isodose line. Penumbra begond the 20% line is wider than corresponding photon beam. The output factors ranged 0.894 for 6 x 6 cm field to 1.187 for 30 x 30 cm field. gamma contamination of neutron beam was 4.9% at 2 cm depth in 10 x10 cm field.
