TER Radioterapia Practice Questions - TER - Título De Especialista Em Radioterapia (Sociedade Brasileira De Radioterapia AMB) Exam

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In 4-dimensional computed tomography (4D-CT) simulation for thoracic and upper abdominal lesions, how is the Internal Target Volume (ITV) defined according to ICRU Report 62?

ITV = Clinical Target Volume (CTV) + Internal Margin (IM) accounting for physiological tumor motion and shape variations ITV = Gross Tumor Volume (GTV) + Planning Target Volume (PTV) setup margin ITV = Gross Tumor Volume (GTV) + micro-invasion margin only ITV = Total treated volume receiving at least 95% of the prescription dose

Correct Answer:

ITV = Clinical Target Volume (CTV) + Internal Margin (IM) accounting for physiological tumor motion and shape variations

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