Abstract

In fractionated radiation therapy of head-and-neck cancer patients, the actual delivered dose can be considerably different from the planned dose due to noticeable volumetric and anatomic variations occur during the treatment course. The purpose of this study is to evaluate volumetric changes in the target and critical organs during IMRT treatment for patients with head-and-neck cancer, and investigate discrepancy between the planned and delivered doses using weekly CBCT image guidance.

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