Vertical X-ray CT System (VXCT)

Vertical X-ray CT System

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

The Geotek VXCT platform is a vertical X-ray scanning system, catering to clients who are imaging the sediment-water interface or have small floor areas within their lab. The system is capable of acquiring both 2D X-ray transmission images and 3D helical X-ray CT volumes to generate outputs that reveal the internal structure of a core sample.

How it works

Samples are loaded vertically and positioned aligning with the core holders. The core sample remains stationary, and the source and detector move vertically down the core to complete the scan. The flexibility of the source and detector position allows the user to achieve a voxel/pixel resolution between 30µm and 350µm. If multi-angle or full 3D CT scanning is required, the core can be rotated to your desired angle.

Geotek VXCT How Helical Works

DATA ACQUISITION AND PROVIDED SOFTWARE – ROTATING CORE

The Geotek VXCT system is delivered with complementary software packages to allow for the visualisation, acquisition and processing of core samples. Software packages included:

  • 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 CT
    • 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
    • Voltage Range: 45 kV to 130 kV
    • X-ray Spot Size Range: 7 μm (at 4W) – 100 μm (at 65 W)
    • Detector: 1920 x 1536 pixel flat panel detector
    • Image Resolution Range: 30 µm to 350 µm
    • Size (L x D x H mm): 1950 x 670 x 2500
    • Weight: c. 2200 kg
    • Utilities: 100 V to 240 V, single phase, 50-60 Hz
    • Cooling: None
    • Core 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: Vertically held with centralising core cones on a heavy duty stage
    • Rotation accuracy: 0.002 degrees
    • Rotation Method: Horizontal core rotation
    • CT Reconstruction: Cone beam helical reconstruction; standard cone beam reconstruction