4D-MRI at 0.55T for internal target volume delineation in liver radiation therapy planning.

ABSTRACT:

Background

Low-field MRI provides superior soft-tissue contrast compared to CT while costing significantly less than high-field MRI, which makes it a more accessible option for MRI-guided radiation therapy planning. Four-dimensional MRI (4D-MRI) is a technique that has been increasingly adopted clinically for internal target volume (ITV) delineation in free-breathing liver radiotherapy planning, and it requires high spatial resolution and accurate respiratory phase differentiation to enable precise dose planning. The feasibility of 4D-MRI at low-field strength, specifically at 0.55T, has not been evaluated.

Purpose

This study aims to investigate the feasibility of 4D-MRI for ITV delineation in liver radiation therapy planning using a commercial 0.55T MRI scanner.

Methods<

SUBMITTER: Miao X 

PROVIDER: S-EPMC12409090 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature