Three-dimensional medical image reconstruction for both transmission and emission tomography has traditionally decomposed the problem into a set of two-dimensional reconstructions on parallel transverse sections. An approach for reconstructing tomographic images based on the idea of continuous dynamical methods is presented. The method consists of a continuous-time image reconstruction (CIR) system described by differential equations for solving linear inverse problems.In this paper, it is provided to reconstruct three-dimensional(3D) models of human body by using CT slices and digital images and precisely finding locations of pathological formations such as tumour. It is necessary to incise a 3D object to obtain detail structure information inside in the process of developing 3D medical visualization system. We design the program reconstruct 3D images utilizing the CT slice sequence in PAT format based on marching cubes by visual C++ 6.0 and Visualization Toolkit (VTK) toolbox,which are used to Cuboids that can be controlled to zoom, move or circumrotate by mouse and used for clipping the object of 3D object. The results supplied by the proposed algorithm are examined with the help of some relevant examples.

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The evaluation of standard test blocks plays an important role in nondestructive test, quality of which influences the inspection and production activities. The weak magnetic inspection is adopted, which direct at the common defections including wracks and holes to achieve the quantitative analysis of standard test block, regarding the split test plate as the detected objects. The standard test block is scanned horizontally and respectively by single detector, dual detector and triple detector. The collected data is analyzed and the experimental results are compared. The result shows that the method not only can probe out the location of defects, but also can take the quantitative analysis of those defections within a given range of error.