Standard X-ray CT System (XCT)

Standard X-ray CT System

Visualise a core’s internal structure with X-ray Imaging

The versatile Geotek XCT system allows for the acquisition of both 2D X-ray transmission images and full 3D helical X-ray CT volumes of core samples through horizontal scanning techniques. The system is available with a 130 kV or 180 kV microfocus closed X-ray source to meet different industry needs and core types. Whether lined whole core, split core, or slabbed core sections, the XCT’s flexible geometry allows for scanning cores of varying diameters. Adjustable X-ray source and detector positions can be optimised for image quality, resolution and core size.

CABINET SAFE – No need for a lead-lined room!

Mobile Laboratory, Onshore or Offshore Worldwide
Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), Trieste
Arctic University of Norway (UiT), Tromso

How it works

Samples are loaded horizontally into one of the cabinet arms inside of an X-ray tube and centralised by wirelessly controlled motorised arms. The core sample translates through the centre cabinet past a fixed source and detector position that the user has selected, and can be rotated under computer control to examine internal structures at various angles. The flexibility of the source and detector positions allows the user to achieve a voxel/pixel resolution between 35 microns and 300 microns on the XCT.

DATA ACQUISITION AND PROVIDED SOFTWARE – ROTATING CORE

The XCT system rotates the core sample to create the three-dimensional data set. Core can be rotated under manual or computer control to examine structures or collect rotational movies. Core rotation allows visualisation of three-dimensional features by the operator and choice of optimum scanning orientation.

  • Geotek X-ray acquisition software – allows the operator to set-up their scan parameters and acquire data with real-time visualisation.
  • Geotek GQuickView software – allows the user to view and manipulate the X-ray radiographs and CT slabs.
  • Geotek CTQuickView software – allows the user to view and manipulate stacked tiff image sequences to create orthogonal and unwrapped slabs
  • Geotek Reconstructor software – allows the user to reconstruct using helical or circular reconstruction recipes and view the core slices or generate orthogonal slabs.

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6.0 Software
Geotek X-ray acquisition software
Geotek XCT Software
Reconstructor
Geotek Reconstructor software
G quickview
Geotek GQuickView Software
CT Quickview
Geotek CTQuickView Software
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ACQUISITION MODES

The Geotek XCT system offers various acquisition modes which may be selected prior to scanning: 2D radiography, laminography and 3D CT. These are outlined below, but for further information, please see our technique pages.

  • 2D Radiography
    • Multi-angle 2D transmission images with software corrections to produce virtual slab

  • 3D Laminography
    • Quasi-3D imaging technique using tomographic reconstruction to reconstruct planes within the core

  • 3D Helical CT
    • Helical data acquisition with tomographic reconstruction to produce axial slices and orthogonal and circumferential slabs or a 3D volume

  • Specifications

    • X-ray source: 65 W Thermo Kevex 130 kV Microfocus or 90 W Hamamatsu 180 kV Microfocus
    • Voltage Range 130 kV: 45 kV to 130 kV
    • Voltage Range 180 kV: 40 kV to 180 kV
    • X-ray Spot Size Range 130 kV: 7 µm (at 4 W) – 100 µm (at 65 W)
    • X-ray Spot Size Range 180 kV: 20 µm (at 4 W) – 200 µm (at 90 W)
    • Detector: 1920 x 1536 pixel flat panel detector
    • Image Resolution Range: 30 µm to 350 µm
    • Size (L x D x H mm): 130 kV – 5000 x 620 x 2050
    • Size (L x D x H mm): 180 kV – 5000 x 620 x 2050
    • Weight: 130 kV – c. 1200 kg
    • Weight: 180 kV – c. 2000 kg
    • Utilities: 100 V to 240 V, single phase, 50-60 Hz
    • Cooling: None
    • Cores Dimensions: Diameter – 5 cm to 15 cm, Length – up to 1.5 m in length
    • Output: 16-bit Tiffs for 2D deliverables and 16-bit Tiff stack with automated report generation for 3D deliverables
    • Core Loading: Bluetooth-controlled Push-Me-Pull-You motorised arms
    • Rotation accuracy: 0.002 degrees
    • Rotation Method: Horizontal core rotation
    • CT Reconstruction: Cone beam helical reconstruction; standard cone beam reconstruction

For further information please contact us.