Pilot Quality Control Program for Audit RT External Beams at Mexican Hospitals

摘要

A pilot quality control program for audit 18 radiotherapy RT external beams at 13Mexican hospitals is described --for eleven ~(60)Co beams and seven photon of 6, 10 15MV from accelerators. This program contains five parts: a) Preparation of the TLD-100 powder:washing, drying and annealing (one hour 400 °C plus 24 hrs 80 °C). b) Sending two IAEA typecapsules to the hospitals for irradiation at the hospital to a nominal D_w= 2 Gy. c) Preparation at theSSDL of ten calibration curves CC in the range of 0.5 Gy to 6 Gy in terms of absorbed dose towater Dw for ~(60)Co with traceability to primary laboratory NRC (Canada), according to a windowirradiation: 26/10/2007-7/12/2007. d) Reading all capsules that match their hospital timeirradiation and the SSDL window irradiation. f) Evaluation of the Dw imparted by the hospitals.