A Novel Technique for Finding the Boundary between the Cerebral Hemispheres from MR Axial Head Scans.
K. Somasundaram, Thiruvenkadam Kalaiselvi · 2009
We present a robust technique to detect a linear boundary between the cerebral hemisphere using the knowledge of brain features and magnetic resonance imaging (MRI) characteristics. We use two approaches to extract the brain from T1 and T2 MR axial head scans to find the brain contour. From the brain contour, we detect the boundary between the hemispheres by joining the edges of the two portions of cleft that corresponds to inter-hemispheric fissure present in the contour. The detected boundary is used to separate the cerebrum into two hemispheres. We tested our method over several scans collected from MRI centre and authorized brain image web sites. The performance was validated with medical experts using both normal and abnormal scans. The predictive accuracy gives the quantitative measure calculated between the handstripped and our result and is 99% in normal cases and lowered for abnormal slices.