Semi-automatic delineation using weighted CT-MRI registered images for radiotherapy of nasopharyngeal cancer.

Abstract

PURPOSE To develop a delineation tool that refines physician-drawn contours of the gross tumor volume (GTV) in nasopharynx cancer, using combined pixel value information from x-ray computed tomography (CT) and magnetic resonance imaging (MRI) during delineation. METHODS Operator-guided delineation assisted by a so-called "snake" algorithm was applied on… (More)
DOI: 10.1118/1.3611045

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