Comparison of four dimensional computed tomography and magnetic resonance imaging in abdominal radiotherapy planning.

ABSTRACT:

Background and purpose

Four-dimensional (4D) computed tomography (CT) is widely used in radiotherapy (RT) planning and remains the current standard for motion evaluation. We assess a 4D magnetic resonance imaging (MRI) sequence in terms of motion and image quality in a phantom, healthy volunteers and patients undergoing RT.

Materials and methods

The 4D-MRI sequence is a prototype T1-weighted 3D gradient echo with radial acquisition with self-gating. The accuracy of the 4D-MRI respiratory sorting based method was assessed using a MRI-CT compatible respiratory simulation phantom. In volunteers, abdominal viscera were evaluated for artefact, noise, structure delineation and overall image quality using a previously published four-point scoring system. In patients undergoing abdo

SUBMITTER: Oar A 

PROVIDER: S-EPMC7807635 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature