Rajesh A Kinhikar et al 2006 Phys. Med. Biol. 51 N263 doi:10.1088/0031-9155/51/14/N01
Rajesh A Kinhikar1, Pramod K Sharma1, Chandrashekhar M Tambe1, Umesh M Mahantshetty2, Rajiv Sarin3, Deepak D Deshpande1,2,3 and Shyam K Shrivastava2
Show affiliationsIn our earlier study, we experimentally evaluated the characteristics of a newly designed metal oxide semiconductor field effect transistor (MOSFET) OneDose™ in-vivo dosimetry system for Ir-192 (380 keV) energy and the results were compared with thermoluminescent dosimeters (TLDs). We have now extended the same study to the clinical application of this MOSFET as an in-vivo dosimetry system. The MOSFET was used during high dose rate brachytherapy (HDRBT) of internal mammary chain (IMC) irradiation for a carcinoma of the breast. The aim of this study was to measure the skin dose during IMC irradiation with a MOSFET and a TLD and compare it with the calculated dose with a treatment planning system (TPS). The skin dose was measured for ten patients. All the patients' treatment was planned on a PLATO treatment planning system. TLD measurements were performed to compare the accuracy of the measured results from the MOSFET. The mean doses measured with the MOSFET and the TLD were identical (0.5392 Gy, 15.85% of the prescribed dose). The mean dose was overestimated by the TPS and was 0.5923 Gy (17.42% of the prescribed dose). The TPS overestimated the skin dose by 9% as verified by the MOSFET and TLD. The MOSFET provides adequate in-vivo dosimetry for HDRBT. Immediate readout after irradiation, small size, permanent storage of dose and ease of use make the MOSFET a viable alternative for TLDs.
87.53.Jw Therapeutic applications, including brachytherapy
Issue 14 (21 July 2006)
Received 17 April 2006, in final form 18 April 2006
Published 23 June 2006
Rajesh A Kinhikar et al 2006 Phys. Med. Biol. 51 N263
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