Calibration of strontium-90 eye applicator using a strontium external beam standard.
Four techniques for measuring the dose rate from Sr-90 concave eye plaques are presented. The techniques involve calibrating a concave eye plaque against a Sr-90 teletherapy unit using X-Omat film, radiochromic film, black LiF TLD discs and LiF chips. The mean dose rate predicted by these dosimeters is 7.5 cGy s(-1). The dose rate quoted by the manufacturer is 33% lower than this value, which is consistent with discrepancies reported by other authors. Calibration against a 6 MV linear accelerator was also carried out using each of the above dosimetric devices, and appropriate sensitivity correction factors have been presented.
Siddle
D
D
Medical Physics Department, Addenbrooke's Hospital, Cambridge, UK.
Langmack
K
K
D001918:Brachytherapy / Q000295:instrumentation* / Q000379:methods*; D002138:Calibration; D005123:Eye; D006801:Humans; D010315:Particle Accelerators; D019047:Phantoms, Imaging; D011879:Radiotherapy Dosage; D013326:Strontium Radioisotopes / Q000008:administration & dosage* / Q000627:therapeutic use; D014867:Water; D014962:X-Ray Film
D013326:Strontium Radioisotopes; D014867:Water