Analog presentation of association fibers of human brain by the diffusion tensor magnetic resonance tractography;

Due to limitations of imaging devices and techniques,and of fiber tractography algorithms,it has been difficult to describe organization of white matter fiber accurately.

The ability to show the orientation,development and abnormity of the major white matter fiber in human brain make diffusion tensor imaging(DTI) and fiber tractography(FT) a new hotspot in brain and cognitive science.

According to the limitation of the traditional algorithms, this dissertation presents a new fiber tracking algorithm based on the diffusion shape.

In this paper, a background on the acquisition and mathematics of DTI is discussed and a novel step-variant fiber tracking model is proposed.

This paper presents a method to synthesize fiber models, which are then used to validate fiber tracking algorithm.

Technology tracking is a useful method in identifying the current situation and trend of development in related technical areas,and ean help us provide the information decision-making support for establishment of technical strategy,but the in- depth research of technology tracking is not enough.

The article makes preliminary discussion on the mode of technology tracking,puts forward four kind of modes of technology tracking,simultaneously to analysis the influencing factors of technology tracking mode,forms the theory frame of the technology tracking mo.

Founded on concept explanation, the article makes preliminary discussion on the structure and process of technology tracking, developed tools of technology tracking based on patent quotation, which as a kind of technical analysis is fundamental to of technology strat.