Accuracy of four models and update strategies to estimate liver tumor motion from external respiratory motion.

ABSTRACT:

Background

This study investigates different strategies for estimating internal liver tumor motion during radiotherapy based on continuous monitoring of external respiratory motion combined with sparse internal imaging.

Methods

Fifteen patients underwent three-fraction stereotactic liver radiotherapy. The 3D internal tumor motion (INT) was monitored by electromagnetic transponders while a camera monitored the external marker block motion (EXT). The ability of four external-internal correlation models (ECM) to estimate INT as function of EXT was investigated: a simple linear model (ECM1), an augmented linear model (ECM2), an augmented quadratic model (ECM3), and an extended quadratic model (ECM4). Each ECM was constructed by fitting INT and EXT during the first 60s of each fr

SUBMITTER: Samadi Miandoab P 

PROVIDER: S-EPMC11458717 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature