Expedition 316, Hole C0004C X-RAY CT scan image   snapshot date: 2010-11-09

Information

The 3D X-ray CT images for whole-round core sections are the first measurement to be done on board. Whole-core photography and X-ray imaging provide information about surface features and internal structure. The resolution of CT scanning is under 0.35 mm and allows 5 mm depth for beam width. The computed tomography (CT) scan provides 3D evidence of fractures, vugs, fault structure, sedimentary structure and methane hydrates without disturbing the sample. A pure water standard piece and air is used for calibrate giving CT-values. It requires about 5 minutes to scan each 1.5 m section of core.

Image file

Each ZIP file corresponds to a section and the filename of a ZIP file consists of section identifier. A ZIP file contains DICOM files of axial images as well as a reformatted coronal image. Each DICOM file has DICOM header with image data. Pixel data are compressed without any losses by JPEG2000 in the DICOM files (See Section 8.2.4. JPEG 2000 image compression in Digital Imaging and Communications in Medicine (DICOM) Part 5: Data Structures and Encoding distributed in DICOM Homepage).

Software Utilitys - They are not support by CDEX. -

• OsiriX is an image processing software dedicated to DICOM images (".dcm" / ".DCM" extension) produced by imaging equipment (MRI, CT, PET, PET-CT, SPECT-CT, Ultrasounds, ...).
• GDCM is an open source DICOM library. It is meant to deal with DICOM files (as specified in part 10 of the DICOM standard). Command line tool gdcmconv can convert encapsulated DICOM to RAW by issuing a command like gdcmconv --raw compressed.dcm uncompressed.dcm.

lost data

Axial images for some sections were mistaken to archive while they were measured. Empty files whose names end with .lost indicate such sections.

Data Index

See also data in the J-CORES database for the same hole to refer related information.

[BETA] xray-ct_316-C0004C.torrent: BitTorrent metainfo file to download all these files by using BitComet or Vuze. To download files by the metainfo, BitTorrent clients have to support the web seeding of Getright Webseeding spec HTTP/FTP Seeding for BitTorrent without any trackers. According to Comparison of BitTorrent clients, BitComet, BitTyrant and Vuze do; µTorrent does not since it is only capable for Web seed support for single-file torrents. BitComet Version 1.21 on Windows XP SP3 and Vuze Version 4.5.0.0 on Windows XP SP3 and on Mac OS X 10.6.4 worked well. BitTyrant has not been tested yet.