Remote detection of hyperpolarized Xe-129 resonances via multiple distant dipolar field interactions with H-1

摘要

A remote detection scheme utilizing the distant dipolar field interaction between two different spin species was proposed by Granwehr et al. [J. Magn. Reson. 176(2), 125 (2005)]. In that sequence H-1 spins were detected indirectly via their dipolar field interaction with Xe-129 spins, which served as the sensing spins. Here we propose a modification of the proposed detection scheme that takes advantage of the longer T-1 relaxation time of xenon to create a long lasting dipolar field with which the fast relaxing H-1 spins are allowed to interact many times during a single acquisition. This new acquisition scheme improves detection sensitivity, but it also presents some challenges. Published by AIP Publishing.