Nikon Scanner

 Skyscan 1072                                          Nikon XT 225ST

 

Computed tomography (CT) is an x-ray methodology that yields 3-dimensional results. A sample is placed on a rotational stage, between the x-ray tube and the detector. The part is then rotated 360 degrees and images are captured at specific intervals, such as every degree or every half degree. This series of images is then reconstructed to render the 3-dimensional x-ray model of the part. With CT visualization software, you can then slice through the part in any direction to yield the view and image that you need to interrogate the internal configuration of the part. The benefits of CT are that it is the only way to get 3D views of the inside of a part and the only way to get true dimensional information without cutting it up. The limitations of CT centre around the density of the material to be scanned and the shape, size and geometry of the part. Large parts, parts made of high-density materials, or parts with very flat dimensions can be challenging for CT scanning and may provide marginal results.

Nikon XT H 225 CT

The Nikon XT H 225ST scanner can be used to visualise a wide range of materials:

  • Mineralogical - such as soils and rock cores
  • Biological - including bone and dentine
  • Man-made - including plastic, carbon-fibre and metal

Information on system

Reflection target 225 kV 225 W. Resolution: 5-125µm voxel size

Perkin Elmer 1620 16-bit 2000 x 2000 200µm 3.5 fps  (7 fps bin x2) 

Maximum sample diameter of 25cm (weight 30kg)

1cm specimens can be scanned at the highest resolution of 5 um voxel (3D pixel) size

Typical scan times using the Nikon vary from 10 to 120 minutes

Reconstructed scan sizes vary from 5-21GB

Resulting scans can be viewed in VG Studio GGL free viewer

More information about the micro-CT scanner is available on the Nikon Metrology website

Internal costs £910 per day, £50 sample  - staff costs extra

For more info contact microscopy@abdn.ac.uk

 

Skyscan 1072

Skyscan 1072

  • RECOMMENDED SAMPLE SIZE: 1.5cm diameter x maximum height of 3cm. RESOLUTION: 4 microns (this can be reached if sample has diameter of < 5mm). MAGNIFICATION: max 120x
  • Low mag x15 = 19 micron pixel. 19mm diam and 18mm height
  • An x-ray tomography system allows us to visualise and measure complete 3-dimensional object structures without sample preparation or chemical fixation

How does it work?

A Micro-focused X-ray source illuminates the object of interest, which is positioned on a precision manipulator. The x-ray Shadow Images are acquired by a sensitive X-ray Camera. During the Image Acquisition the sample is rotated step at a time through 180 degrees. Images are recorded at each rotation. Using software 2 dimensional images based on x-ray density can be recalculated from the x-ray Shadow Images.

One or more of these 2D images can be stored in the computer and then using other software these images can be added together to form a 3D model of the sample. The software allows for numerical data to be calculated from the morphology of the samples structure.

For more information on instrument capabilities and examples of applications go to the manufacturers website

Software Download

For more information on instrument capabilities and examples of applications go to the manufacturers website:

  • Free downloads for latest versions of software -  Dataviewer, CtVol, CtVox, Nrecon and Ctan. Also pdf links with measurement details etc.