Image-to-head registration based on the laser scanning system – a phantom study
| Autor: | Chi-Fan Wang, 王啟帆 |
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| Rok vydání: | 2006 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 94 In this paper, a practical methodology of surface-based registration to achieve good mapping performance is reported. A laser scanning system is used to digitize the facial feature of a phantom so as to mesh the physical space into triangular facets. On the other hand, the image space is established by translating the corresponding CT image into point set. The image-to-physical registration task is carried out by a optimal searching mechanism in order to find those parameters in the rigid-body transformation until the sum of the squared normal distances is minimized. Considering that mapping the massive points in registration task would consume the computation time, there is only a suitable sample size to stand for the entire population with sufficient confidence and accuracy are extracted statistically from the CT point space to map to the laser scanning space. Registration results evaluated by gauging the position errors of the markers on phantom forehead show the proposed methodology with good repeatability as well as robustness to perform the image-to-physical registration. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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