发明名称 |
Method of preparing polyvinyl alcohol gel and MRI phantom. |
摘要 |
<p>A method of preparing a polyvinyl alcohol hydrogel contains the steps of charging an aqueous solution of a polyvinyl alcohol having a degree of hydrolysis of not less than 95 mol% and an average polymerization degree of not less than 500 into a container, the aqueous solution containing the polyvinyl alcohol in a concentration of not less than 5 wt.%, cooling the aqueous solution of the polyvinyl alcohol at a temperature of from - (minus) 9 DEG C to - (minus) 3 DEG C, subjecting the aqueous solution of the polyvinyl alcohol to physical stimulation, and then maintaining the aqueous solution of the polyvinyl alcohol at a temperature of from - (minus) 5 DEG C to + (plus) 5 DEG C. The polyvinyl alcohol hydrogel may be contained in a plastic container. An MRI phanton is composed of the plastic container containing such polyvinyl alcohol hydrogel.</p> |
申请公布号 |
EP0376241(A2) |
申请公布日期 |
1990.07.04 |
申请号 |
EP19890123932 |
申请日期 |
1989.12.27 |
申请人 |
NIPPON OIL CO., LTD. |
发明人 |
KOBAYASHI, TOMOKAZU;MORIHIRO, TOSHIO |
分类号 |
A61B5/055;B01J13/00;C08J3/03;G01R33/28;G01R33/58 |
主分类号 |
A61B5/055 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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