Treatment Setup Accuracy in Tomotherapy for Quantitative Assessment of Imaging Frequency

Image guided radiation therapy is turning into the quality of practise for several treatment sites and techniques, particularly those which involving high dose gradients like stereotactic radiosurgery (SRS), stereotactic radiation therapy (SBRT) and intensity modulated radiation therapy (IMRT). The aim of this study is to quantify the setup accuracy for numerous IGRT frequency protocols from tattoo-only setups with no imaging, to imaging each fifth, fourth, third, second fraction, moreover as daily imaging before TomoTherapy IMRT treatment. Total vector shifts were calculated from the lateral, longitudinal and vertical (x,y,z) displacements and therefore themean shift error for the assorted protocols analyzed for 5 treatment sites: bone, head and neck, prostate, prostate bed and respiratory organ…

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