Unsupervised Corpus Callosum Extraction for T2-FLAIR MRI Images

Many algorithms and methods have been published regarding Corpus Callosum extraction from MRI images. However, all of these approaches use T1-weighted images or existing human brain atlas as their basis. We propose a new algorithm that can work with T2-FLAIR image. The basis of our method is from the observation that corpus callosum is located directly above a cavity inside the brain in almost every MRI images. We highlight the corpus callosum by first extracting the cavity inside the brain and then performing a morphological dilation upwards to get the rough location of the corpus callosum. Our evaluation shows that this method achieves an average of 76.90% in DSC when used to extract corpus callosum from 30 different images and 3 different subjects.