Accessing the Image Data
The image data can be downloaded at this address:
If you have not registered on the MRL site previously, you will be asked to create an account. Registration allows us to keep track of the use of the image data (number of downloads, who, where). Your registration information is safe and will not be redistributed.
Separate files are available for each of the 10 subjects. Each file is a Linux tape archive (tar) file, compressed with GNU Zip (gzip). Thus each file has the ending “.tar.gz”. The size of each file is approximately 3 GB.
Under Linux or other Unix operating systems, each individual download can be uncompressed and extracted using the commands:
- gunzip .tar.gz
- tar – xvf .tar
This will create a subdirectory containing all of the image data files for the particular subject in DICOM format, as well as a copy of the license agreement and this file. Each image file represents one slice of the image dataset.
Both gzip and tar are available for Windows, and there are a number of free software tools that can extract .tar.gz files under Windows.
The image files have the extension “.dcm”. Many image processing, segmentation and visualization programs can open these DICOM files directly. The free software ImageJ is one option:
To open an image stack in Image J, choose “Import” from the “File” menu, and then choose “Image Sequence”. Choose the first image in the stack and then click “Open”.