What type of study is this?

This is a Experimental Study study.

September 17, 2025

Optimization of a 1-13Cpyruvic acid sample preparation for clinical hyperpolarization

Key Points

Adding 0.5mM DOTA-Gd chelate increases liquid state polarization by 1.5-fold.
The optimized preparation leads to a 50% increase in SNR without hardware changes.
T1 measurements at clinical DNP conditions were done using in situ LOD-ESR measurements.
Enhanced initial polarization significantly impacts hyperpolarized-MRI diagnostic capabilities.

Abstract

Motivation: Because of the nonrenewable out of equilibrium magnetization, hyperpolarized (HP) MRI is critically SNR-limited. In that context, more initial polarization should translate into superior diagnostic performances. Goal(s): Optimizing the 1-13Cpyruvic acid preparation for a 5T clinical hyperpolarizer system. Approach: Optimizing the sample preparation by measuring the electronic T1 (T1e) at actual clinical DNP conditions using in situ LOD-ESR measurements. Results: Adding 0.5mM of DOTA-Gd chelate to the standard 1-13Cpyruvic acid clinical preparation led to an optimal T1e and consequent 1.5-fold increase in liquid state polarization. Impact: Hyperpolarized-MRI diagnostic capability depends on the initial polarization of the contrast agent. Clinical polarizers are complex and expensive machines. We propose an easy to implement optimized sample preparation leading to a 50% SNR increase without any hardware modification.

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Cite This Study

Hyacinthe et al. (Tue,) studied this question.

synapsesocial.com/papers/68d4597b31b076d99fa5cde4 https://doi.org/https://doi.org/10.58530/2025/4476

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