ArticleMagnetic resonance in medicine2025
DIM: A diffusion instability measure for MRI quality assurance.
Article in Magnetic resonance in medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- DIM: A diffusion instability measure for MRI quality assurance.Magnetic resonance in medicine · 2025Article
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2 authors.
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Abstract
purposeThe aim of the presented work is to develop a diffusion instability measure (DIM) that can be used in quality assurance.
methodsSingle-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.
resultsThe DIM values ranged between about 5000 and 280 000 ppm across the data sets. The worst and best image quality-and hence the highest and lowest DIM values-were observed for b-value = 4000 s/mm
conclusionDIM is a sensitive tool for evaluating image quality in HARDI scans on a quantitative basis. It is simple to implement without the need for hardware or software modifications.
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