Precise, Comprehensive Testing of MRI Scanners

Magphan® Phantoms are designed to perform a wide range of precision performance evaluations of Magnetic Resonance Imaging (MRI) Scanners.

Precision Design for Maximum Evaluation

The Magphan®'s patented spherical design combines precise alignment of spherical geometry with cubic geometry. As magnetic field characteristics are mapped according to spherical harmonics, natural magnetic fields extend to diagonally symmetric volumes (DSVs), or spheres.

Tests - Summary

  • Spatial uniformity.
  • Signal-to-noise ratio (SNR).
  • Spherical geometry.
  • In-vitro sample testing.
  • Geometric distortion (spatial linearity).
  • Pixel (matrix) size verification.
  • Scan slice width and contiguity.
  • Verification of patient alignment system.
  • Spatial resolution up to 11 line pairs per cm (0.45 mm resolution).
  • Low contrast sensitivity.
  • T1 and T2 measurements.
  • Evaluation of 3-dimensional volume reconstruction.

Cylindrical and Spherical models are available

Spherical Magphan is a urethane sphere composed of two hemispherical shells with an inner diameter of 20cm. The shells are connected with a simple threaded flange connecting ring. The test cube assembly can be quickly removed without tools for greater imaging flexibility and easy access for cleaning and maintenance.

Cylindrical Magphan has a removable end plate for internal access. The acrylic cylinder has an outer diameter of 20cm and an inner diameter of 19cm.

Magphan® Quantitative Imaging Phantom

Precise, Comprehensive Measurement of Volume Distortion in MR Scanners Used in the ADNI Study.

The Magphan® Quantitative Imaging Phantom was developed with physicist Richard Mallozzi, Ph.D., to provide detailed mapping of image distortion. The phantom contains an array of polycarbonate spheres. Known and scanned sphere positions are compared, yielding up to fourth-order measurements of scanner distortion.


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