Response of the FBX system to a carbon beam: its potential as a dosimeter in heavy particle radiotherapy.
The FBX aqueous chemical dosimeter contains 0.2 mol m(-3) ferrous ammonium sulphate, 5.0 mol m(-3) benzoic acid and 0.20 mol m(-3) xylenol orange in 40.0 mol m(-3) sulphuric acid. The dosimeter can measure photon and electron doses in the range 0.1 to 3000 cGy in radiotherapy. The response of this dosimeter was measured for a 53.2 MeV carbon beam in the present work. Our initial result indicates that the sensitivity of the FBX system to the carbon beam as compared to cobalt-60 gamma rays is 25.5%, and thus we believe that the FBX system could be a useful dosimeter for carbon beams and similar heavy ions considered useful in radiotherapy.
Department of Radiotherapy, Army Hospital Research and Referral, New Delhi, India. manojsemwal@yahoo.co.in
M K
MK
Semwal
Milan
M
Banerjee
Asiti
A
Sarma
P B
PB
Vidyasagar
D019817:Benzoic Acid / Q000737:chemistry; D002244:Carbon / Q000737:chemistry*; D003037:Cobalt Radioisotopes; D004307:Dose-Response Relationship, Radiation; D004867:Equipment Design; D005296:Ferrous Compounds / Q000737:chemistry; D010636:Phenols; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D012680:Sensitivity and Specificity; D013454:Sulfoxides; D014992:Xylenes / Q000737:chemistry
D003037:Cobalt Radioisotopes; D005296:Ferrous Compounds; D010636:Phenols; D000644:Quaternary Ammonium Compounds; D013454:Sulfoxides; D014992:Xylenes; D002244:Carbon; D019817:Benzoic Acid; C038178:ammonium ferrous sulfate; C016833:xylenol orange