Improved real-time tagged MRI using REALTAG.

ABSTRACT:

Objectives

To evaluate a novel method for real-time tagged MRI with increased tag persistence using phase sensitive tagging (REALTAG), demonstrated for speech imaging.

Methods

Tagging is applied as a brief interruption to a continuous real-time spiral acquisition. REALTAG is implemented using a total tagging flip angle of 180° and a novel frame-by-frame phase sensitive reconstruction to remove smooth background phase while preserving the sign of the tag lines. Tag contrast-to-noise ratio of REALTAG and conventional tagging (total flip angle of 90°) is simulated and evaluated in vivo. The ability to extend tag persistence is tested during the production of vowel-to-vowel transitions by American English speakers.

Results

REALTAG resulted in a doubling of contrast-to-noi

SUBMITTER: Chen W 

PROVIDER: S-EPMC7180094 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature