Gastrointestinal 4D MRI with respiratory motion correction.

ABSTRACT:

Purpose

Gastrointestinal motion patterns such as peristalsis and segmental contractions can alter the shape and position of the stomach and intestines with respect to other irradiated organs during radiation therapy. Unfortunately, these deformations are concealed by conventional four-dimensional (4D)-MRI techniques, which were developed to visualize respiratory motion by binning acquired data into respiratory motion states without considering the phases of GI motion. We present a method to reconstruct breathing-compensated images showing the phases of periodic gastric motion and study the effect of this motion on regional anatomical structures.

Methods

Sixty-seven DCE-MRI examinations were performed on patients undergoing MRI simulation for hepatocellular carcinoma using a

SUBMITTER: Johansson A 

PROVIDER: S-EPMC8172093 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature