Experimental and Monte Carlo-based determination of the beam quality specifier for TomoTherapyHD treatment units

Implementation and challenges of international atomic energy agency/american association of physicists in medicine trs 483 formalism for field output factors and involved uncertainties determination in small fields for tomotherapy

“…Determination of these additional correction factors requires tissue maximum ratio and normalized peak-scatter factor for the field size S at 85 cm SSD,[ 19 ] which are not available. As reported by Howitz et al .,[ 12 ] the beam quality calculated by Monte-Carlo simulation was 0.628 and 0.631 from two different calculation methods and the experimental mean value of 0.635, all agreed within 1.28% to our measured value of 0.627.…”

“…determined both the experiment and Monte-carlo based beam quality index TPR 20,10 (10) at hypothetical 10 cm × 10 cm field size for the TomoTherapyHD machine. [ 12 ] Caprile et al . measured and calculated the output factors (OF) on the TomoTherapy machine with the smallest field size of 1.25 cm in the X-direction and fixed 5 cm jaw opening.…”