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- Title
Evaluation of contrast agent dose and diffusion coefficient measurement on vessel size index estimation.
- Authors
Vejdani Afkham, Behrouz; Masjoodi, Sadegh; Oghabian, Mohammad Ali; Ghodsi, Seyed Roholah; Nazem Zadeh, Mohammad Reza; Esmati, Ebrahim; Farzin, Mostafa; Gilasi, Maziar; Hashemi, Hasan
- Abstract
Objectives: The goal of this study is to examine the effect of contrast agent (CA) dose and diffusion coefficient on the estimation of vessel size index (VSI). Materials and methods: Three groups of four participants were enrolled in this study and two different experiments were performed. Different dose of CA, namely 0.1 mmol/kg and 0.05 mmol/kg were assessed in two groups of normal subjects. Diffusion coefficient effect was assessed in the third group with high-grade glioma. Imaging included gradient echo and spin-echo DSC and DTI on a 3-T MR Scanner. Results: VSI estimation using half of standard dose of CA showed higher values compared to the application of standard, with a ratio of 2 for the WM and 1.5 for the GM. VSI estimates for tumor tissues (22 µm) were considerably higher compared to contra-lateral Normal-Appearing WM (NAWM, 4 µm, P < 0.01) and Normal-Appearing GM (NAGM, 8 µm, P < 0.04). Discussion: Application of standard dose for CA injection and also taking into account the effect of diffusion coefficient can lead to a better correlation of VSI with previous theoretically predicted values and improvement of individual diagnostics in tumor evaluations.
- Subjects
DIFFUSION measurements; DIFFUSION coefficients; DIFFUSION tensor imaging; CONTRAST effect
- Publication
MAGMA: Magnetic Resonance Materials in Physics, Biology & Medicine, 2019, Vol 32, Issue 5, p529
- ISSN
0968-5243
- Publication type
Article
- DOI
10.1007/s10334-019-00760-4