Determining the longitudinal accuracy and reproducibility of T₁ and T₂ in a 3T MRI scanner.

ABSTRACT:

Purpose

To determine baseline accuracy and reproducibility of T₁ and T₂ relaxation times over 12 months on a dedicated radiotherapy MRI scanner.

Methods

An International Society of Magnetic Resonance in Medicine/National Institute of Standards and Technology (ISMRM/NIST) System Phantom was scanned monthly on a 3T MRI scanner for 1 year. T₁ was measured using inversion recovery (T₁ -IR) and variable flip angle (T₁ -VFA) sequences and T₂ was measured using a multi-echo spin echo (T₂ -SE) sequence. For each vial in the phantom, accuracy errors (%bias) were determined by the relative differences in measured T₁ and T₂ times compared to reference values. Reproducibility was measured

SUBMITTER: Carr ME 

PROVIDER: S-EPMC8598150 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature