Accuracy, repeatability, and reproducibility of T₁ and T₂ relaxation times measurement by 3D magnetic resonance fingerprinting with different dictionary resolutions.

ABSTRACT:

Objectives

To assess the accuracy, repeatability, and reproducibility of T₁ and T₂ relaxation time measurements by three-dimensional magnetic resonance fingerprinting (3D MRF) using various dictionary resolutions.

Methods

The ISMRM/NIST phantom was scanned daily for 10 days in two 3 T MR scanners using a 3D MRF sequence reconstructed using four dictionaries with varying step sizes and one dictionary with wider ranges. Thirty-nine healthy volunteers were enrolled: 20 subjects underwent whole-brain MRF scans in both scanners and the rest in one scanner. ROI/VOI analyses were performed on phantom and brain MRF maps. Accuracy, repeatability, and reproducibility metrics were calculated.

Results

In the phantom study, all dictionaries showed high T

SUBMITTER: Wicaksono KP 

PROVIDER: S-EPMC10017611 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature