## Purpose: To compare isotropic (combined diffusion-weighted image [cmb], apparent diffusion coefficient [adc], trace, exponential adc [eadc], and isotropically-weighted diffusion image [isodwi]) and anisotropic (relative anisotropy [ra], fractional anisotropy [fa], and volume ratio [vr]) diffusio
A Phantom for diffusion-weighted imaging of acute stroke
β Scribed by Hans. J. Laubach; Peter M. Jakob; Karl O. Loevblad; Alison E. Baird; Maria Picone Bovo; Robert R. Edelman; Steven Warach
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 655 KB
- Volume
- 8
- Category
- Article
- ISSN
- 1053-1807
No coin nor oath required. For personal study only.
β¦ Synopsis
A tissue phantom for diffusion-weighted imaging was developed, basing its contrast between two compartments on different apparent diffusion coefficients, without contrast due to T2 relaxation and proton density. These contrast properties of the phantom simulate the situation found in normal gray matter and areas of acute ischemia. A possible application of the phantom was demonstrated for the investigation of the accuracy of volume measurements based on diffusion-weighted images.
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## Abstract The purpose of this study was to determine the diffusion sensitivity factor __b__ that optimizes the contrastβtoβnoise ratio (CNR) for both diffusionβweighted signal intensity and the apparent diffusion coefficient (ADCNR) when evaluating ischemic stroke by diffusionβweighted MRI. The r