The multi-parameter dependence of magnetic resonance (MR) images allows a unique flexibility of soft tissue contrast and gives access to peculiar sources of in vivo tissue characterization, mainly associated with magnetic relaxation properties. However, MR methodologies have not yet expressed their
I. Introduction, objectives, and activities
✍ Scribed by F. Podo; J.S. Orr; K.H. Schmidt; W.M.M.J. Bovée
- Book ID
- 103909107
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 532 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0730-725X
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✦ Synopsis
NMR offers, in the complex proton relaxation properties of biological tissues, a unique and potentially powerful tool of tissue characterization. The difficulties encountered so far in comparing the results of in vitro and in vivo NMR studies carried out in different laboratories inhibit NMR methodologies from fully expressing their content of physiopathological information, as well as their potential for therapeutic monitoring. Moreover, obtaining accurate data on proton relaxation in vivo requires accurate location of the anatomical region under study. The acquisition of acceptable information about location and effects is dependent on the establishment of agreed procedures for tests, as well as on the use of appropriate test objects and test substances. A concerted research project entitled "Identification and Characterization of Biological Tissues by NMR" was activated in 1984 by the European Economic Community as part of the Third Medical Research Program, under the auspices of the Biomedical Engineering Concerted Action Committee. A series of papers is presented here which illustrates objectives and scientific programs of this project, the protocols adopted for multi-center comparison of in vitro and in vivo studies, and the results of validating trials, as well as problems of reference substances.
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By enabling noninvasive measurements of tissue biochemistry, nuclear magnetic resonance spectroscopy (MRS) provides a unique means of characterizing tissues. Differences in equipment, techniques, and methodology between different laboratories cause major difficulties when comparing results, whether