An algorithm is quickly scans a digital image volume to detect density nodules. A first stage is based on a transform to quickly highlight regions requiring further processing. The first stage operates with somewhat lower sensitivity than is possible with more detailed analyses, but operates to highlight...http://www.google.com.hk/patents/US6909797?utm_source=gb-gplus-share專利 US6909797 - Density nodule detection in 3-D digital images
