A rapid, computational approach for assessing interfraction esophageal motion for use in stereotactic body radiation therapy planning.

ABSTRACT:

Purpose

We present a rapid computational method for quantifying interfraction motion of the esophagus in patients undergoing stereotactic body radiation therapy on a magnetic resonance (MR) guided radiation therapy system.

Methods and materials

Patients who underwent stereotactic body radiation therapy had simulation computed tomography (CT) and on-treatment MR scans performed. The esophagus was contoured on each scan. CT contours were transferred to MR volumes via rigid registration. Digital Imaging and Communications in Medicine files containing contour points were exported to MATLAB. In-plane CT and MR contour points were spline interpolated, yielding boundaries with centroid positions, C_CT and C_MR. MR contour points lying outside of the CT contour w

SUBMITTER: Cardenas ML 

PROVIDER: S-EPMC6000025 | biostudies-literature | 2018 Apr-Jun

REPOSITORIES: biostudies-literature