[Research report of experimental database establishment of digitized virtual Chinese No.1 female].

OBJECTIVE: To establish digitized virtual Chinese No.1 female (VCH-F1) image database. METHODS: A 19 years old female cadaver was scanned by CT, MRI, and perfused with red filling material through formal artery before freezing and em- bedding. The whole body was cut by JZ1500A vertical milling machine with a 0.2 mm inter-spacing. All the images was produced by Fuji FinePix S2 Pro camera. RESULTS: The body index of VCH-F1 was 94%. We cut 8 556 sections of the whole body, and each image was 17.5 MB in size and the whole database reached 149.7 GB. We have totally 6 versions of the database for different applications. CONCLUSIONS: Compared with other databases, VCH-F1 has good representation of the Chinese body shape, colorful filling material in blood vessels providing enough information for future registration and segmentation. Vertical embedding and cutting helped to retain normal human physiological posture, and the image quality and operation efficiency were improved by using various techniques such as one-time freezing and fixation, double-temperature icehouse, large-diameter milling disc and whole body cutting.

[Review of global activities and events for DNA 50 years].

In 25, April, 1953, the paper discovering DNA double helix by Watson and Crick published in Nature, it is a great event for finding life secret in mankind history. This year is 50th anniversary of the event. Scientists in the world including in China have a lot of memorial activities to review research results obtained in past 50 years and to prospect developments in next 50 years. The paper reviews DNA 50 memorial activities and events in the world and predicts possible relation between DNA and Digital Human Project.