The third Chinese visible human dataset produced / 第三军医大学学报

Objective To establish more detailed dataset of Chinese visible human male. Methods After undergoing macroscopical, CT and MRI examinations to exclude organic lesion, a young aged, middle sized male cadaver was selected as the subject. First, morphological measurement and vascular perfusion were performed. Second, after embedding with 5% gelatin, the cadaver was put in ice house and frozen to -30 ℃ for 1 week. Third, TK 6350 numerical control milling machine (milling accuracy of 0.001 mm) was used to shave off slices of the body layer by layer from head to foot at -25 ℃ in low temperature laboratory. Fourth, the successive cross sections were photographed with high resolution digital camera and scanned into an animation computer. Thus, data acquisition from cadaver model was completed to obtain structural dataset of the human body. Results The selected sample was a 21 year old, 1 820 mm in height, 66 kg in weight male died due to non organic disease. CT with 1.0 mm slice thickness for the head and neck and 2.0 mm for the rest of the body was performed. MRI with 1.5 mm slice thickness for the head and neck and 3.0 mm for the rest of the body was also performed. A total of 18 398 serial cross sections with the thickness of 0.1 mm of each section were obtained. The digital photographs were sampled at a resolution of 10 989 056 (4 064?2 704) pixels. The data file of each section occupies 62.9 MB. The complete data files occupy 1 157.23 GB. The research results are issued simultaneously on the Internet (http://www.chinese visiblehuman.Conclusion ① Review of the related literatures reveals that the thinnest thickness of the reported cross section of the visible human dataset is 0.2 mm(the thickness of the sections of the skull base of the first case of Chinese visible human reported by our research group is 0.1 mm.), and the slices consist of several thousands of serial cross sections with several millions of pixels. The data files occupy several tens of GB or more than 100 GB. However, the thickness of the cross sections of the whole body of the dataset achieved in our research is 0.1 mm. The total slices consist of 18 398 serial cross sections with the photographic resolution of 11 million pixels and the total data file reaches 1 157.23 GB. The three indexes mentioned above are elevated by 1 log unit. ② We have solved the key technical problems in data acquisition of visible human such as super thin serial cross sectioning, enormous quantity of data storing and display of tiny blood vessels.

Visualization of the first Chinese visible human male and female / 第三军医大学学报

Objective To achieve computer visualization of the first Chinese visible male and female Methods After acquisition of the dataset of the first Chinese visible male and female (2 518 cross sections were obtained from the visible male, the complete data files take up 90 468 GBs; while 3 640 cross sections from the female, the complete data files take up 131 04 GBs ), we processed 2 D images in an SGI Workstation and on P4 computer respectively Then, image registration was performed through reserved scaling point Reconstruction was achieved by two approaches: volume rendering reconstruction and surface rendering reconstruction Results We visualized the whole body and special parts of Chinese visible male and female on an SGI Workstation and a personal computer respectively Furthermore, by optimizing 3 D reconstruction and data processing technique, interactive 3 D visualization of the dataset was achieved Conclusions ①The dataset of the first Chinese visible male and female proves to be eligible for 3 D visualization research ②The platform setup of interactive 3 D visualization of Chinese visible male and female dataset provides foundation for digital human anatomy and virtual surgery ③The models of human organs and parts built through data segmentation, classification, registration and drawing lay basis for rendering complex structures of the whole human body delicately

Sectional anatomy at any orientation of the pancreas and its surrounding structures / 第三军医大学学报

Objective To establish the three-dimensional model of pancreas and its surrounding structures.Methods The three-dimensional pancreas model was established and analyzed by using PC computer platform based on the data set from the first Chinese visible human female.Results The three-dimensional pancreas model,established successfully,could be rotated at any angles and could be sectioned at any orientation.The structures of each section could be displayed clearly.Conclusion Sectional anatomy at any orientation of the pancreas and its surrounding structures can be performed on our pancreas model,which has laid the foundation for virtual surgery of the pancreas.

Construction and identification of mouse Osf2/Cbfal gene recombinant adenovirus / 第三军医大学学报

Objective To construct the recombinant adenovirus of mouse Osf2/Cbfal gene and to observe its ability to infect NIH3T3 fibroblasts. Methods The Osf2/Cbfal gene fragment was cloned into the shuttle plasmid pAdTrack-CMV to form the transfer vector by the method of homogenous recombination in bacteria. Then the recombinant adenovirus was transfected into NIH3T3 cells using Lipofectine DOTAP, The target gene was detected by poly-merase chain reaction (PCR). The titer and its infection rate were determined using the green fluorescent protein (GFP) expression in the shuttle plasmid. Results Restriction endonuclease and PCR analyses confirmed that the Osf2/Cbfal gene was successfully inserted into the adenovirus vector. The titer of the recombinant adenovirus was 1.6?1012 pfu/ml. The adenovirus had a strong effect on NIH3T3 cells. Conclusion The recombinant adenovirus containing Osf2/Cbfal gene was successfully constructed by the method of homogenous recombination in bacteria.

In situ HYBRIZATION STUDY ON GAP-43mRNA EXPRESSION DURING NERVE INJURE / 解剖学报

Objective To study GAP\|43mRNA expression during nerve injure and regeneration. Methods Rat sciatic nerve was crushed then, in situ hybridization technique was used to explore GAP\|43mRNA expressions in spinal cord and dorsal root ganglion (DRG). Results The neurons of spinal cord and DRG were detected to have GAP\|43 hybridization sinal by 2 days after sciatic nerve lesion. At later times(4,7 and 14 days postsurgery) the anterior horn motor neurons and DRG cells showed an increase in the number of GAP\|43mRNA positive neurons, followed by a significant rise in their content of GAP\|43mRNA. The number of GAP\|43mRNA positive neurons was decreased by 30 days postinjure, and was nearly nomal 60 days postinjure.Conclusion GAP\|43mRNA expression was increased during peripheral nerve injure and regeneration. The study showed that GAP\|43 may play a key role in nerve regeneration. [

Dataset collection and visualization for first visible human female in China / 第三军医大学学报

Objective To build the dataset of Chinese visible human female. Methods After undergoing macroscopical, CT and MRI examinations to exclude organic lesions, a young female cadaver of medium height was selected as the subject. After morphological measurement and vascular perfusion, the cadaver was embedded with 5% gelatin and cryopreserved in a -30 ℃ icehouse for 1 week. A digital milling machine TK 6350 (milling accuracy of 0.001 mm) was used to shave off slices of the body layer by layer from head to foot in a laboratory at -25 ℃. The successive cross sections were photographed with a high definition digital camera, and the pictures were put into a computer to establish a dataset of human body. By utilizing the image dataset derived from the successive cross sections, 3D reconstruction and stereodisplay of human structure were finished with a SGI Workstation which was equipped with an independently self developed software package for 3D reconstruction. Results The selected specimen, a 22 year old female native of Chongqing, was 1 620 mm in height, 54 kg in weight and died of non organic disease. CT scans were made in every 1.0 mm for head and neck and every 2.0 mm for rest parts, and the thickness for MRI scans was 1.5 mm for head and 3.0 mm for rest parts. For serial cross sections, the thickness was 0.25 mm for head and 0.5 mm for rest parts. Thus, a total of 3640 slices were obtained, and the photo for every slice was saved as a 36 MB file in a resolution of 6 291 456 pixels (3 072?2 048). Finally, the complete data files reached to 131.04 GB. Conclusion ① This is the first formally reported case of Chinese visible human female, suggesting that China becomes the second country owning visible human female dataset of her population. We set up a website for the purpose of exchanging ideas and information on this subject. So, the results are issued simultaneously on the Internet (http://www.chinesevisiblehuman.com).② According to US Visible Human Project(VHP), the data of the 3 junctional parts of their female cadaver were absent because the body was cut into 4 segments. Taking the age of 59 year old into account, the visible human female's body was not exactly perfect. The sections of 0.33 mm in thickness were saved to pictures at a resolution of 2 490 368 pixels (2 048?1 216). While, the first Chinese visible human female reported here is a young female without organic disease or lesion. No sectional datum is lost for being acquired from successive sections of the whole body. The resolution of cross sectional image reaches to 6 291 456 pixels (3 072?2 048).