Investigation of the relative conformity and efficiency for ... - Wcenter.de
Investigation of the relative conformity and efficiency for ... - Wcenter.de
Investigation of the relative conformity and efficiency for ... - Wcenter.de
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Results• The results from <strong>the</strong> lung phantom plan QI scores are reported in <strong>the</strong> Tablebelow.• Beam σ from 3-12 mm were capable <strong>of</strong> providing QI scores between 1-3.• However, to achieve this result, a higher total number <strong>of</strong> beams wererequired as sigma increased.• Because 2-3 proton beams are commonly used in clinical lung treatments,<strong>the</strong>re<strong>for</strong>e this was not consi<strong>de</strong>red to be problematic.Lung Phantom Con<strong>for</strong>mity OAR Hit QI3mm - 1 Field 1 1.0 16mm - 1 Field 2 1.3 26mm - 2 Field 1 1.0 19mm - 1 Field 4 1.6 29mm - 2 Field 3 1.1 29mm - 3 Field 2 1.1 212mm - 1 Field 7 1.7 412mm - 2 Field 5 1.2 512mm - 3 Field 5 1.4 3Right: Axial dose difference<strong>of</strong> single 3 <strong>and</strong> 12 mm σbeams surrounding target(interior dashed line).Right: 2 fields <strong>of</strong>6 mm σ<strong>de</strong>livered to aspherical target(gray) within anorgan at risk(green)