Metal artefact reduction for accurate tumour delineation in radiotherapy.

ABSTRACT:

Background and purpose

Two techniques for metal artefact reduction for computed tomography were studied in order to identify their impact on tumour delineation in radiotherapy.

Materials and methods

Using specially designed phantoms containing metal implants (dental, spine and hip) as well as patient images, we investigated the impact of two methods for metal artefact reduction on (A) the size and severity of metal artefacts and the accuracy of Hounsfield Unit (HU) representation, (B) the visual impact of metal artefacts on image quality and (C) delineation accuracy. A metal artefact reduction algorithm (MAR) and two types of dual energy virtual monochromatic (DECT VM) reconstructions were used separately and in combination to identify the optimal technique for each implant

SUBMITTER: Kovacs DG 

PROVIDER: S-EPMC5864514 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature