Hybrid T₂ - and T₁ -weighted radial acquisition for free-breathing abdominal examination.

ABSTRACT:

Purpose

Most clinical MR examinations require acquisition of different image contrasts. For abdominal exams, the scans are conventionally performed as separate acquisitions using respiratory gating or repeated breath holding, which can be time-inefficient and challenging for patients. Here, a hybrid imaging approach is described that creates T₂ - and T₁ -weighted images from a single scan and allows for free-breathing acquisition.

Theory and methods

T₂ -weighted data is collected using 3D fast spin-echo (FSE) acquisition with motion-robust radial stack-of-stars sampling. The wait time between the FSE trains is used to acquire T₁ -weighted gradient-echo (GRE) data. Improved robustness is achieved by extracting a respiratory signal f

SUBMITTER: Benkert T 

PROVIDER: S-EPMC6107373 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature