发明名称 |
Biomedical imaging and analysis |
摘要 |
A method for synthesizing three dimensional multimodality image sets into a single composite image with accurate registration and congruence. Surfaces are initially extracted from two or more different images to be matched using semi-automatic segmentation techniques. These surfaces are represented as contours with common features to be matched. A distance transformation is performed for one surface image, and a cost function for the matching process is developed using the distance image. The geometric transformation includes three-dimensional translation, rotation and scaling to accommodate images of different position, orientation and size. The matching process involves efficiently searching this multi-parameter space and adjusting a surface or surfaces to find the best fit among them which minimizes the cost function. The local minima problem is addressed by using a large number of starting points. A pyramid multi-resolution approach is employed to speed up both the distance transformation computation and the multi-parameter minimization processes. Robustness in noise handling is accomplished using multiple thresholds embedded in the multi-resolution search. The method can register both partially overlapped and fragmented surfaces.
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申请公布号 |
US5568384(A) |
申请公布日期 |
1996.10.22 |
申请号 |
US19920960128 |
申请日期 |
1992.10.13 |
申请人 |
MAYO FOUNDATION FOR MEDICAL EDUCATION AND RESEARCH |
发明人 |
ROBB, RICHARD A.;JIANG, HONG-JIAN |
分类号 |
G06T7/00;(IPC1-7):G06F159/00 |
主分类号 |
G06T7/00 |
代理机构 |
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代理人 |
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地址 |
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