Examples

MSCL-XCT Examples

X-ray images are collected as 12-bit greyscale data and are presented here as 8-bit greyscale linear, rotational, and helical movies. Dense areas are dark, less dense areas are light. Greyscale CT reconstructions use the same dense = dark convention.


Linear Scan

This movie was created using the x-ray images of a 10 cm diameter 1 m long whole round core moving through the MSCL-XR at 1 mm intervals. Note the changes in the appearance of certain features as the core moves through the cone of the x-ray beam.


Helical


CT Reconstruction: Fly-Through

This movie shows horizontal slices from a CT reconstruction of a 14 cm section of the core shown in the above movies. Each slice is less than 150 microns in thickness. Features to note are the whiter areas that are expansion cracks, the small black spots and lines that are sulphide stringers and a burrow that appears about half way through the movie moving from from top right to bottom left of the frame.


Rotation

This movie was produced from a series of images as the core is rotated at 0.4 degree intervals. The core contains dense features that are thought to be authigenic carbonate nodules. This rotation in an X-ray cone beam enables the viewer to visualise the sedimentary features inside the core without requiring full CT reconstruction. Unlike CT, these images can be viewed in real time and are available immediately after acquisition has finished.


CT Reconstruction: Maximum Intensity Projection

This movie shows a three-dimensional CT reconstruction of the 14 cm section of nodule-bearing core shown in the rotation above. This is a maximum-intensity projection that highlights the dense locations in the core (in this case, carbonate nodules). Dense regions are yellow; less dense regions are purple.


Glacial Debris Rotation

This movie was produced from a series of images as the core is rotated at 0.4 degree intervals. The core contains dropstones and other glacial debris. The rotation helps to visualise the structures inside the core without requiring full CT reconstruction. Unlike CT, these images can be viewed in real time. (Courtesy of Scripps Institution of Oceanography)


Glacial Debris MIP

This movie shows a three-dimensional CT reconstruction of the lower portion of the core in the rotation above. This is a maximum-intensity projection that highlights the dense locations in the core (in this case, glacial debris). Dense regions are dark; less dense regions are light. (Courtesy of Scripps Institution of Oceanography)