Longitudinal nuclear spin relaxation of ¹²⁹ Xe in solution and in hollow fiber membranes at low and high magnetic field strengths.

ABSTRACT:

Purpose

To measure dissolved-phase ¹²⁹ Xe T₁ values at high and low magnetic fields and the field dependence of ¹²⁹ Xe depolarization by hollow fiber membranes used to infuse hyperpolarized xenon in solution.

Methods

Dissolved-phase T₁ measurements were made at 11.7T and 2.1 mT by bubbling xenon in solution and by using a variable delay to allow spins to partially relax back to thermal equilibrium before probing their magnetization. At high field, relaxation values were compared to those obtained by using the small flip angle method. For depolarization studies, we probed the magnetization of the polarized gas diffusing through an exchange membrane module placed at different field strengths.

Results

Total loss of polarization

SUBMITTER: Bryden N 

PROVIDER: S-EPMC9420755 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature