DIM: A diffusion instability measure for MRI quality assurance.

ABSTRACT:

Purpose

The aim of the presented work is to develop a diffusion instability measure (DIM) that can be used in quality assurance.

Methods

Single-shot, spin-echo, echo-planar imaging HARDI diffusion data sets were collected on a spherical silicone oil phantom with 64 different diffusion directions on a 3T Philips Achieva and a 3T Siemens Cima.X scanner with similar acquisition protocols. A few data sets on the Philips Achieva included concurrent magnetic field monitoring. A correlation coefficient matrix among the diffusion directions for each data set was calculated, and subsequently, one minus its eigenratio was defined as the DIM.

Results

The DIM values ranged between about 5000 and 280 000 ppm across the data sets. The worst and best image quality-and hence the high

SUBMITTER: Schmidt T 

PROVIDER: S-EPMC12501680 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature