IMRT 2018

VMAT%vs.%Helical Tomotherapy

• Expected(little(difference(when(large(modulation(is(not(required((for( instance:(non(concave(target)…large(number(of(fields((i.e.:(one(arc)(is( enough:(very(efficient(solution • Differences(should(increase(for(complex(cases(where(more(modulation( is(necessary • In(complex(cases,(differences(should(decrease(when(multiple(arcs(are( used • TradeCoff(between(quality(and(efficiency(…even(with(VMAT((number(of( arcs)…and(Tomotherapy (reducing(modulation(factor….)

Cao et al, 2007 (prostate, brain, HN) Iori et al , 2008 (prostate) [constant dose-rate] Ulrich et al , 2009 (prostate, anal canal, HN) Fogliata et al, 2008 (benign intracranial lesions) Fogliata et al, 2009 (pediatric lesions) Wolff et al, 2009 (prostate)

Tang et al, 2010 (HN, lung, brain) Jacob et al, 2010 (HN, Prostate) Clemente at al, 2010 ( HN) Tsai et al , 2010 (Prostate) Room et al, 2010 (prostate, HN, lung) Wiezoreck et al, 2011 (HN)