Feasibility of 3D tracking and adaptation of VMAT based on VMAT-CT.

ABSTRACT:

Background

Local computed tomography (CT) reconstruction is achievable with portal images acquired during volumetric-modulated arc therapy (VMAT) delivery and was named as VMAT-CT. However, the application of VMAT-CT is limited because it has limited field of view and no density information. In addition, the new generation of multi-leaf collimator with faster speed and various collimator angles used in patients' plans could cause more artifacts in VMAT-CT. The goal of this study was to extend VMAT-CT concept, generate complete three-dimensional (3D) CT images, calculate new 3D dose, track and adapt VMAT plan based on updated images and dose.

Materials and methods

VMAT-CT and planning CT of phantoms were fused by rigid or deformable registration to create VMAT-CT+ images. Tra

SUBMITTER: Zhao X 

PROVIDER: S-EPMC7442647 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature