The Pro-MRI ACR Medium is a head-coil compatible quality assurance (QA) and accreditation phantom from Diagnomatic, approved for use under the American College of Radiology (ACR) MRI Accreditation Program. The series is designed to provide efficient measurement of critical imaging parameters for magnetic resonance imaging (MRI) — both for calibration and daily monitoring.

Key features and benefits

• Compact size (Ø 178 mm) makes it suitable for use in standard head coils — saving time and making QA testing easier without changing equipment.

• Designed for measuring a number of important parameters: geometry distortion, spatial resolution, slice thickness and position, inter-slice spacing, image bandwidth, low contrast detection, uniformity, signal-to-noise ratio (SNR), slice offset (physical and electronic) and water-fat shift.

• ACR approved and CE certified; complies with ACR MRI Accreditation Program, IPEM Report 80, AAPM Reports 28, 34 and 100 standards.

• Comes with instructions for use that guide you through test procedures and evaluation of results — making QA work more consistent and documentable.

Technical specifications

• Outside cylinder diameter: 178 mm (≈7″)

• Outside cylinder height: 157 mm

• Inner cylinder diameter: 165 mm (≈6.5″)

• Internal cylinder height: 134 mm

• Filling chemical: solution with 10 mmol NiCl₂ and 0.45% weight NaCl (sodium chloride)

• Solution insert: matrices with hole diameters 0.8 / 0.9 / 1.0 / 1.1 mm Taiwan Healthcare

• Low contrast input: contrasts of approximately 1.4%, 2.5%, 3.6% and 5.1%

Areas of application

• QA and accreditation of MRI systems – ideal for departments that want to document and control image quality according to ACR requirements.

• Clinical and research institutions that primarily use head coils and want a medium-sized phantom that fits without major changes in coil configuration.

• Repetitive and daily QA routines – time-optimized design allows processes to be done quickly and with high repeatability.