发明名称 |
Negative contrast agents for magnetic resonance imaging comprising barium sulfate and a clay |
摘要 |
A negative contrast agent for MRI is an aqueous suspension having a quantity of barium sulfate between 25 and 30 percent by weight and a quantity of bentonite between 2.5 and 3.5 percent by weight and between 0.15 and 0.25 mM Fe as a ferrite. Such a negative contrast agent provides substantially black imaging in a T2 weighted pulse sequence; namely a relative signal intensity (RSI) of near zero. It also provides a relative signal intensity (RSI) of well under 10 percent of that of water in a T1 weighted pulse sequence.
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申请公布号 |
US5424142(A) |
申请公布日期 |
1995.06.13 |
申请号 |
US19930065192 |
申请日期 |
1993.05.20 |
申请人 |
E-Z-EM, INC. |
发明人 |
DAVIS, MICHAEL A. |
分类号 |
A61B5/055;A61K49/00;A61K49/04;A61K49/18;G01R33/28;(IPC1-7):A61B5/055 |
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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