Abstract
Methods Fractionated total body irradiation (FTBI) before bone marrow transplantation (BMT) was performed in 15 patients with different proliferative diseases. Common regimen of 12 Gy in 8 fractions (four days) was applied with the reduction of dose to lungs to 9.4 Gy. Results Midline dose discrepancies ranged from −15.9% to +9.9% and exceeded ±10% of prescribed dose in one patient. Outside midline dose discrepancies ranged from −16.5% to +19.8% and exceeded ±10% of prescribed dose in six patients. Dose determination error was estimated for between 2.8% and 5% depending on the body part. Conclusions Estimated error of the dose determination increased dose deviations from prescribed values from between −1.6% and +4.8% to between −5.2% and +9.3% in midline and from −8.4% and +19.8% to between −12.0% and +24.8% across transverses.
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