Research on cardiac MR images analysis is a primary topic in the field of medical image for many years. The tagged MR imaging technique proposed at the end of 80's

last century

it was very attractive in that the tag line and tag plane provided a particular approach to track the motion of the left ventricle. It is a hot topic in the field of medical image at present to analyze the tagged cardiac MR images. In this paper

a brief introduction to tag-based motion tracking technique is presented at first

and sequentially

the existing methods for tagged image segmentation

including the epicardium and endocardium segmentation of left ventricle and tag stripes tracking

are inspected

as for shape recovery and motion reconstruction of left ventricle (LV)

five approaches are discussed with comparison and summary of their merits and demerits

these methods are deformable model

stochastic model

B-spline based model

harmonic phase method and optical flow method. Another aspect of this topic is the strain analysis of LV which provides intuitive quantities for physicians. Here

some important results are also presented. In the last section of this paper

several problems in the existing methods are discussed and they are helpful for further work.