Respiratory motion-resolved, self-gated 4D-MRI using rotating cartesian k-space (ROCK).

ABSTRACT:

Purpose

To propose and validate a respiratory motion resolved, self-gated (SG) 4D-MRI technique to assess patient-specific breathing motion of abdominal organs for radiation treatment planning.

Methods

The proposed 4D-MRI technique was based on the balanced steady-state free-precession (bSSFP) technique and 3D k-space encoding. A novel rotating cartesian k-space (ROCK) reordering method was designed which incorporates repeatedly sampled k-space centerline as the SG motion surrogate and allows for retrospective k-space data binning into different respiratory positions based on the amplitude of the surrogate. The multiple respiratory-resolved 3D k-space data were subsequently reconstructed using a joint parallel imaging and compressed sensing method with spatial and temporal r

SUBMITTER: Han F 

PROVIDER: S-EPMC5462449 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature