CLG Optical Flow Approach and Frequency Analysis of Cranial Ultrasonogram Image Sequences

Abstract

The artery pulsation has a strong correlation with the blood flow in the newborn baby head and tissuemotion has a relationship with artery pulsation. In this paper, we propose a novel method to estimate the tissuemotion quantitatively by combining local and global motion estimation methods, namely combined local-global (CLG) optical flow technique in cranial ultrasonogram of newborn babies. Tissue motions are estimated in different coronal sections successfully and their errors are also estimated. Further, we analyze the time variant tissue-motion by using discrete Fourier transform. We also observed the pulsation in the time variant motion images and strong pulsation is observed in the harmonic frequency of tissue-motion that has a relation to the heartbeat frequency of a newborn baby which is helpful for pediatric diagnosis.