Improvement in dose homogeneity in a patient with sinonasal cancer using nasal accessory

摘要

Many treatment regimens for sinonal malignant neoplams remain empirical and controversial because of a lack of sufficient clinical data. This article discusses the considerations in the radiation treatment of the malignancies that arise in the nasal cavity. When the nasal accessory was inserted in patient's nose, the equivalent uniform dose (EUD) increased from 104.7% to 106.5 % and the homogeneity index (HI) was drastically improved from 1.05 to 0.41 using nasal accessory. Moreover, delivered dose to organs at risk (OARs) tends to decrease. For sinonasal cancer patients nasal accessory improved homogeneity of target and maximum doses were decreased for critical organs.