A New Quantitative Analyzing Method for Doppler Tissue Image Sequences

doi:10.3969/j.issn.1002-0837.2001.01.004

Abstract：To develop a new method to obtain mechanical motion informat ion of all the points in region of interest(ROI) from 2-dimensional B-scanned D oppler tissue images,and as an application,it is used to describe the activatio n process of sinus-atria node (SAN) quantitatively. Method By d ecomposing and a nalyzing the color components in the Color Bar provided by ultrasound system,the quantitative relationship of the color components and acceleration was derived. Color-coded Doppler shift information was separated from the final captured im a ges and the acceleration value can be obtained using the relationship. The metho d was used to analyze DTI image sequences for a description of the SAN motion an d activation process of dogs. Result (1) Acceleration values of all the points (pixels in the image) in ROI were obtained through the proposed method.(2) Acc eleration cumulative distribution function(CDF)-time curves of the sinus-atria n ode were given. Conclusion (1) Quantitative description of tiss ue motion can be derived from the 2-D B-scanned Doppler tissue image sequences,which can be us e d to study the tissue motion in the cardiac conduct pathway. (2) Because the pro posed method is based on the analysis of Color Bar that is common in most ultras ound system,it can also be used for Doppler tissue velocity image and for gener al B-scanned DTI image sequences.