Patient specific dosimetry for intensity-modulated radiotherapy delivered with first helical tomotherapy in India--our initial experience of 50 patients.
Two-dimensional (2D) treatment verifications were performed for fifty patients planned and treated with helical tomotherapy (HT). The treatment verification consisted of an extended dose range (EDR2) film measurement as well as point dose measurements made with an A1SL ion chamber. The agreement between the calculated and the measured film dose distributions was evaluated with the gamma parameter calculated (3 mm and 3%). Good agreement was found between measured and calculated distributions with dose parameter registration using reference marks. The mean percent discrepancy for the point dose measurements was -0.4 (SD 1.4) for the high dose, low dose-gradient region. Thus the treatment verification results confirmed the safe delivery of the planned dose to the patient with helical tomotherapy.
Kinhikar
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RA
Tata Memorial Hospital, Parel, Mumbai, India. rkinhikar@rediffmail.com
Master
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Z
Deshpande
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DD
D001822:Body Burden; D003695:Delivery of Health Care / Q000639:trends*; D005260:Female; D006801:Humans; D007194:India; D008297:Male; D009369:Neoplasms / Q000532:radiotherapy*; D011874:Radiometry / Q000379:methods*; D011879:Radiotherapy Dosage; D020266:Radiotherapy, Conformal / Q000379:methods* / Q000639:trends*; D012062:Relative Biological Effectiveness; D016896:Treatment Outcome