发明授权
- 专利标题: Magnetic resonance angiography method and apparatus employing an integration projection
- 专利标题(中): 磁共振血管造影术和采用整合投影的装置
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申请号: US49907申请日: 1993-04-20
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公开(公告)号: US5368033A公开(公告)日: 1994-11-29
- 发明人: Mehran Moshfeghi
- 申请人: Mehran Moshfeghi
- 申请人地址: NY New York
- 专利权人: North American Philips Corporation
- 当前专利权人: North American Philips Corporation
- 当前专利权人地址: NY New York
- 主分类号: A61B5/055
- IPC分类号: A61B5/055 ; G01R33/563 ; G06T11/00
摘要:
Magnetic Resonance Angiography (MRA) method and apparatus for determining an angiogram, in the form of a two-dimensional array of pixel intensities, from time-of-flight or phase contrast MRA volumetric image data utilizes a weighted sum, pixel by pixel, of integration projection (IP) and maximum intensity projection (MIP) 2D pixel arrays formed in the same viewing direction. The forming of the integration projection pixel array is preceded by optional background suppression and optional application of a depth cueing intensity weighting function varying along the viewing direction. The background suppression procedure contains a non-linear unsharp filtering portion followed by an intensity thresholding step.
公开/授权文献
- US4303857A Automatic thermoluminescence dosimetric system 公开/授权日:1981-12-01
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