Material for diagnosis by nuclear magnetic resonance imaging
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United States of America Patent
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Oct 4, 1988
Issued Date -
N/A
app pub date -
Sep 11, 1987
filing date -
Apr 26, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A material for diagnosis by nuclear magnetic resonance imaging is provided. The material comprises a hydrogel having a high water content. The hydrogel is prepared by the steps of casting an aqueous polyvinyl alcohol solution into a mold, cooling the case aqueous solution to obtain a cooled frozen mass and thawing the cooled frozen mass. The cooling and thawing steps may be repeated up to eight cycles. The hydrogel is also prepared by subjecting the cooled frozen mass to a partial dehydration step in vacuum.
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