Evaluation of internal target volume in patients undergoing image-guided intensity modulated adjuvant radiation for gastric cancers.

ABSTRACT:

Objective

To evaluate three-dimensional (3D) displacements of gastric remnant during adjuvant radiation.

Methods

From January 2011 to September 2012, patients undergoing adjuvant image-guided intensity-modulated radiation on tomotherapy were included. Megavoltage CT (MVCT) data sets from daily treatment were coregistered with Day 1 MVCT. Residual stomach remnant was delineated on the data set, while the remaining were blinded to previous day contours. Gastric volume and centre of mass (COM) were determined for all data sets. The 3D deviation of COM was calculated for each fraction. Mean 3D and standard deviation (SD) were calculated for each patient and study population, and a 95% confidence interval (CI) was determined. Also, systematic and random errors for patient populat

SUBMITTER: Aggarwal A 

PROVIDER: S-EPMC3898977 | biostudies-literature | 2014 Jan

REPOSITORIES: biostudies-literature