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

Abstract

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 1 H spins were detected indirectly via their dipolar field interaction with 129 Xe 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 1 H 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. [http://dx