Three-dimensional reconstruction of digitized human liver: based on Chinese Visible Human / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Comparing with two dimensional (2D) imaging, both in diagnosis and treatment, three dimensional (3D) imaging has many advantages in clinical medicine. 3D reconstruction makes the target easier to identify and reveals the volume and shape of the organ much better than 2D imaging. A 3D digitized visible model of the liver was built to provide anatomical structure for planing of hepatic operation and for realizing accurate simulation of the liver on the computer.</p><p><b>METHODS</b>Transverse sections of abdomen were chosen from the Chinese Visible Human dataset. And Amira software was selected to segment and reconstruct the structures of the liver. The liver was reconstructed in three-dimensions with both surface and volume rendering reconstruction.</p><p><b>RESULTS</b>Accurately segmented images of the main structures of the liver were completed. The reconstructed structures can be displayed singly, in small groups or as a whole and can be continuously rotated in 3D space at different velocities.</p><p><b>CONCLUSIONS</b>The reconstructed liver is realistic, which demonstrates the natural shape and exact position of liver structures. It provides an accurate model for the automated segmentation algorithmic study and a digitized anatomical mode of viewing the liver.</p>

Development and clinical application of 3D operative planning system of live in virtual reality environments / 中华外科杂志

<p><b>OBJECTIVE</b>To explore and develop three-dimension (3D) virtual reality (VR) liver model and convert computed tomography data into a fully 3D VR environment for display, measure and manipulation.</p><p><b>METHODS</b>3D-reconstruction of liver was restored from spiral computed tomography (CT) data by using LiVirtue software. Dextrobeam was used to view the 3D model in the VR environment. The liver and its anatomic structure were reconstructed to illuminate the location of the tumor and its related vessels.</p><p><b>RESULTS</b>3D models of liver, tumor and their relative vessels were reconstructed successfully. These models could be viewed and manipulated in the VR environment on personal computer.38 patients underwent liver resection, including 21 right hemihepatectomy, 14 left hemihepatectomy and 3 extended right hemihepatectomy. The intraoperative contrast with preoperative simulation confirmed the reliability of our 3D operative planning system.</p><p><b>CONCLUSIONS</b>The preoperative simulation in 3D VR facilitated liver resection by the ability to view tumor and its relative vessels. This preoperative estimation from 3D model of liver benefits a lot to complicated liver resection.</p>

Investigation of multi-composition in traditional Chinese medicine by module calculation / 中国中药杂志

<p><b>OBJECTIVE</b>To establish a method for the determination of multi-composition in traditional Chinese medicine by module calculation.</p><p><b>METHOD</b>In view of the law of lambert-beer, the modulue of two compositions was converted on basis of peak area by HPLC.</p><p><b>RESULT</b>The modulues of four groups were gotten and the effects of validation were well.</p><p><b>CONCLUSION</b>The method was feasible and could be used within a certain range.</p>