Whole-brain T mapping with radial sampling and retrospective motion correction at 3T.

Purpose: Several barriers prevent the use of whole-brain T mapping in routine use despite increasing interest in this parameter. One of the main barriers is the long scan time resulting in patient discomfort and motion corrupted data. To address this challenge, a method for accurate whole-brain T mapping with a limited acquisition time and motion correction capabilities is investigated.

Rapid whole brain 3D T mapping respiratory-resolved Double-Echo Steady State (DESS) sequence with improved repeatability.

Purpose: To propose a quantitative 3D double-echo steady-state (DESS) sequence that offers rapid and repeatable T mapping of the human brain using different encoding schemes that account for respiratory B variation.

Methods: A retrospective self-gating module was firstly implemented into the standard DESS sequence in order to suppress the respiratory artifact via data binning. A compressed-sensing trajectory (CS-DESS) was then optimized to accelerate the acquisition.