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Large Field MRI Distortion Phantom

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Product Description

Assess Image Distortion in Whole Body MRI

The Large Field MRI Distortion Phantom is designed for assessment of image distortion in whole body MRI for Diagnostic and RT treatment planning. The phantom’s large size and equal spacing in all three orthogonal dimensions makes it suitable for both large bore MRI and CT scanner distortion QA. The phantom can be filled with various signal generating solutions for use in magnetic resonance imaging. When empty, the grid-air interface provides good

contrast under computed tomography. The phantom images well with all CT techniques and MRI sequences tested to date, including T1 weighted, T2 weighted, 3D Time of Flight, MPRAGE and CISS sequences.

The phantom is a liquid fillable, leak-proofed PMMA cylinder 330 mm in diameter by 300 mm long. The entire volume is filled with a unique orthogonal 3D grid of 3 mm diameter rods spaced 20 mm apart thus providing complete geometric data throughout the imaging volume.

The phantom is marked for ease of alignment to positioning lasers and is designed for use with both curved and flat gantry tables.

Image Analysis Software is under development to enable rapid assessment of distortion throughout the field of view.


  • Large FOV distortion evaluation
  • Unique orthogonal grid with equal 3D spacing
  • Leak-proof design
  • Sub-millimeter precision
  • Easy integration and laser alignment
  • Ground truth files for grid available in various digital formats


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