MR-based CT metal artifact reduction for head-and-neck photon, electron, and proton radiotherapy.

ABSTRACT:

Purpose

We investigated the impact on computed tomography (CT) image quality and photon, electron, and proton head-and-neck (H&N) radiotherapy (RT) dose calculations of three CT metal artifact reduction (MAR) approaches: A CT-based algorithm (oMAR Philips Healthcare), manual water override, and our recently presented, Magnetic Resonance (MR)-based kerMAR algorithm. We considered the following three hypotheses: I: Manual water override improves MAR over the CT- and MR-based alternatives; II: The automatic algorithms (oMAR and kerMAR) improve MAR over the uncorrected CT; III: kerMAR improves MAR over oMAR.

Methods

We included a veal shank phantom with/without six metal inserts and nine H&N RT patients with dental implants. We quantified the MAR capabilities by the reduction of

SUBMITTER: Nielsen JS 

PROVIDER: S-EPMC6802740 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature