background: inclusion of inhomogeneity corrections in intensity modulated small fields always makes conformal irradiation of lung tumor very complicated in accurate dose delivery. objective: in the present study, the performance of five algorithms via monte carlo, pencil beam, convolution, fast superposition and superposition were evaluated in lung cancer intensity modulated radiotherapy planni...

Historically, clinical response to internal radionuclides has been related to the macroscopic (i.e., whole-tumor or whole-organ) absorbed dose, implicitly assuming uniform distributions of activity and energy deposition (1,2). However, the actual biologic response among cells within a tumor or organ can vary substantially, depending on spatial nonuniformities of these distributions at the multi...

Introduction: Presence of dental filling material (DFM) such as amalgam in treatment patient with nasopharyngeal cancer (NPC) is common. Streaking artifact Arising from this high density material in computed tomography (scan), may lead to perturbation in dose calculation and dose delivery. Widespread performance of intensity-modulated radiotherapy (IMRT) for NPC using anterior...