发明名称 |
Improved filter for data processing. |
摘要 |
<p>An imaging method and apparatus having a new and improved data filter. In one application of the invention computed tomography number inaccuracies are avoided by use of a new filter function derived from discrete points of a truncated spatial domain convolution filter. The points from the truncated convolution filter are fourier transformed to yield a ramp filter with ripple in the spatial frequency domain. Data from a CT scan is filtered with this new filter function and back projected to produce images that do not exhibit CT number inaccuracies.</p> |
申请公布号 |
EP0195869(A2) |
申请公布日期 |
1986.10.01 |
申请号 |
EP19850309395 |
申请日期 |
1985.12.20 |
申请人 |
PICKER INTERNATIONAL, INC. |
发明人 |
KERBER, MICHAEL M.;BRUNNETT, CARL J. |
分类号 |
A61B6/03;G01N23/04;G06T1/00;G06T5/00;G06T11/00;(IPC1-7):G06F15/62 |
主分类号 |
A61B6/03 |
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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