关键词: 锥束CT；数字样品；材料分布；表面重构

Abstract:

Ministry of Education,Northwestern Polytechnical University, Xi’an,710072
A notion of digital phantom was proposed, which can contain surface geometric information and inner material distribution information of an object simultaneously.Digital phantom modeling method based on cone-beam CT images was studied. In the aspect of digital phantom material modeling, an algorithm of computing material distribution was presented based on material identification. In the aspect of geometry modeling, a novel approach to reconstruct 3D object surface was put forward according to the characteristics of cone-beam CT images, which combined the local structures with the global topology. The experimental results show that the new modeling and realization techniques for measurement and reconstruction of inner structures and surface information of 3D object are feasible.

Key words: cone-beam CT；digital phantom；material distribution；surface reconstruction