Multislice motion modeling for MRI-guided radiotherapy gating.

ABSTRACT:

Purpose

On-board magnetic resonance imaging (MRI) greatly enhances real-time target tracking capability during radiotherapy treatments. However, multislice and volumetric MRI techniques are frame rate limited and introduce unacceptable latency between the target moving out of position and the beam being turned off. We present a technique to estimate continuous volumetric tissue motion using motion models built from a repeated acquisition of a stack of MR slices. Applications including multislice target visualization and out-of-slice motion estimation during MRI-guided radiotherapy are demonstrated.

Methods

Eight healthy volunteer studies were performed using a 0.35 T MRI-guided radiotherapy system. Images were acquired at three frames per second in an interleaved fashion acr

SUBMITTER: Ginn JS 

PROVIDER: S-EPMC6370044 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature