Echo-Planar Imaging of Porous Media with Spatial Resolution below 100 μm
✍ Scribed by B. Manz; P.S. Chow; L.F. Gladden
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 507 KB
- Volume
- 136
- Category
- Article
- ISSN
- 1090-7807
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✦ Synopsis
A modified version of the echo-planar imaging technique incorporating a Carr-Purcell train of 180 degrees rf pulses (PEPI) has been implemented on a standard spectrometer. It is demonstrated that artifacts in the image due to cumulative errors in the rf field can be reduced by replacing each 180 degrees pulse by a composite sequence of three rf pulses. Artifact-free 3D images at 94 &mgrm voxel resolution are obtained within 15 min. This technique has been applied to study the drying process in an initially water-saturated model porous medium with characteristic T*2 of order 700 &mgrs. Copyright 1999 Academic Press.