发明名称 |
Improved gamma camera imaging system |
摘要 |
<p>A scan speed procedure determines a minimum radiation exposure period on an object by object basis for a transmission study. A transmission prescan for a predetermined duration is followed by a second transmission scan phase. A resultant count density (Cm) for the object is then generated and examined. The portion having the smallest count density is determined, and a value representing the minimum required number of counts for transmission study is given. From the above, a transmission period is determined and the second transmission scan phase is performed using a multi-pass scan phase. The transmission period represents the minimum exposure duration to collect transmission data to ensure that the count density distribution for the object will contain at least Cm count density over each portion of the object. <IMAGE></p> |
申请公布号 |
EP0747728(B1) |
申请公布日期 |
2003.01.02 |
申请号 |
EP19960302370 |
申请日期 |
1996.04.03 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
JONES, STEVEN M.;LANG, THOMAS F.;JANICKI, MICHAEL J.;LIEBIG, JOHN R.;BROWN, J. KEENAN;WANG, XIAOHAN |
分类号 |
G01T1/164;(IPC1-7):G01T1/164 |
主分类号 |
G01T1/164 |
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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