Relaxation Time Mapping of ShortT*2Nuclei with Single-Point Imaging (SPI) Methods
✍ Scribed by Steven D. Beyea; Bruce J. Balcom; Pablo J. Prado; Albert R. Cross; Christopher B. Kennedy; Robin L. Armstrong; Theodore W. Bremner
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 505 KB
- Volume
- 135
- Category
- Article
- ISSN
- 1090-7807
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✦ Synopsis
New techniques for quantitative mapping of T 1 , T 2 , and T * 2 are proposed, based on the single-point imaging (SPI) method, for materials with short nuclear magnetic resonance relaxation times which cannot be imaged with traditional methods. Relaxation times extracted from two-dimensional images of uniform doped agarose phantoms (T * 2 Ϸ 60 -210 s) as well as hardened mortar (T * 2 Ϸ 220 s) and polymers (T * 2 Ϸ 20 -100 s), using these techniques, agreed with bulk measurements. The method was then applied to a partially dried cylindrical concrete sample (T * 2 Ϸ 115 s).