Development and implementation of an automatic air delineation technique for MRI-guided adaptive radiation therapy.

ABSTRACT: Objective.Auto-delineation of air regions on daily MRI for MR-guided online adaptive radiotherapy (MRgOART) of abdominal tumors is challenging since the air packets occur randomly and their MR intensities can be similar to some other tissue types. This work reports a new method to auto-delineate air regions on MRI.Approach.The proposed method (named DIFF method) consists of (1) generating a combined volumeV_comb, which is a union of the air-containing organs on a reference MR image offline, (2) transferringV_combfrom the reference MR to a daily MR via DIR, (3) combining the transferredV_combwith a region of high DIR inaccuracy, and (4) applying a threshold to the obtained final combined volume to generate

SUBMITTER: Ahunbay E 

PROVIDER: S-EPMC9639194 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature