MRI Phantom

ACR accredited Medium MRI phantom for comprehensive evaluation of critical imaging parameters of magnetic resonance imaging (MRI) in a time-efficient manner. The phantom can be used for the measurement of absolute values for calibration purposes. However, its design is optimized for quick daily Quality Assurance too. 

The Pro-MRI ACR Medium can be used to measure:

  • geometric distortion
  • spatial resolution
  • slice thickness and position
  • interslice Gap
  • image bandwidth
  • low contrast detectability
  • image uniformity
  • signal-to-noise ratio (SNR)
  • physical and electronic slice offset
  • point of reference
  • bandwidth: water-fat shift


  • ACR accredited
  • Complies with:
    • ACR MRI Accreditation Program
    • IPEM Report 80 “Quality Control in MRI”, 1998
    • AAPM Rep. 28 “Quality Assurance methods & phantoms for MRI”, 1990
    • AAPM Rep. 34 “Acceptance testing of MRI systems”, 1992
    • AAPM Rep. 100 “Acceptance & Quality Assurance procedures for MRI facilities”, 2010
  • CE certified

Basic Specifications

  • outside cylinder diameter: 178 mm
  • outside cylinder height: 157 mm
  • inside cylinder diameter: 165 mm
  • inside cylinder height: 134 mm
  • the phantom is filled with 10 millimolar (mmol) nickel chloride solution containing 0.45% by weight sodium chloride
  • the outside of each phantom has the words “NOSE” and “CHIN” etched into it as an aid to orienting the phantom for scanning, as if it were a head

Resolution insert

  • four matrices of holes, diameters: 0.8, 0.9, 1.0 and 1.1 mm
  • spaces between the holes are equal to hole diameters
  • two small containers with water and fat for water-fat shift evaluation

Slice thickness insert

  • 1 mm wide counter-descending slits on both sides
  • slits form two ramps descending at 1:10

Geometric distortion insert

  • 3x3 holes array, 40 mm spacing,
  • 2 mm diameter
  • 120 mm on a side
  • 10 mm thick

Low contrast insert

  • partial volume contribution of these sheets and filling solution produce contrasts: 1.4, 2.5, 3.6, and 5.1%
  • each disc contains 10 groups of 3 holes arranged in spokes
  • each spoke has the same diameter
  • diameters range from 7.0 to 1.5 mm

Slice position accuracy

  • one set of paired 45° wedges. The distance between the intersection of the wedges is 100 mm

Product included

  • hard-sided carrying case (MR unsafe)


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