Fig. 13.

Examples of good detection and segmentation results obtained from ERT-based methods. FLAIR image with tumour grade II (a1), grade III (a2), grade IV (a3); b1–b3 manual segmentation; c1–c3 results using SVM; and d1–d3 results using ERT. Most of the false-positive superpixels from SVM (e.g. (c1) and (c3)) can be effectively eliminated using ERT, while some tumour superpixels which are wrongly classified to the normal brain tissues by using SVM (e.g. (c2)) can be correctly classified as tumour by using the ERT