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MRI Safety Screening Protocol (ACR)

MRI Safety Screening Protocol (ACR): MRI Examination Ordered → Complete MRI Screening Form → Cardiac Device? → Proceed with EP Clearance.

Interactive Decision Tree

Mini Map

Algorithm Steps

  1. ▶
    Start

    MRI Examination Ordered

    1. ●
      Action

      Complete MRI Screening Form

      Implants, devices, foreign bodies, pregnancy

      1. ◆
        Decision

        Cardiac Device?

        • MRI-Conditional
        • MRI-Unsafe
        1. ■
          End

          Proceed with EP Clearance

          Device reprogrammed, monitoring

        2. ■
          End

          MRI Contraindicated

          Consider CT, US, nuclear

        3. ■
          End

          No Contraindications

          Proceed with examination

      2. ◆
        Decision

        Other Implants?

        1. ●
          Action

          Check MRIsafety.com

          Verify device compatibility

          1. ■
            End

            Proceed per Conditions

            Follow SAR and field limits

      3. ◆
        Decision

        Metallic Foreign Body?

        • Orbital risk
        • No risk
        1. ●
          Action

          Orbit X-ray

          Required if metalwork history

      4. ◆
        Decision

        Pregnancy?

        1. ■
          End

          MRI Generally Safe

          Avoid gadolinium if possible

Guideline Source

ACR Guidance Document on MR Safe Practices

DOI: 10.1002/jmri.26637View Guideline

Clinical Safety Information

Clinical Decision Support — Not a Substitute for Clinical Judgment

Individual patient factors may require deviation from these recommendations.

Known Limitations

  • Device databases not exhaustive
  • New devices may lack safety data
  • Field strength and SAR limits vary

Applicable Regions

USAUUKEU

UK: MHRA guidance

US: ACR guidance; mrisafety.com widely used

Version 1Next review: 2028-01-01

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Frequently Asked Questions

What is the MRI Safety Screening Protocol (ACR)?

The MRI Safety Screening Protocol (ACR) is a diagnostic clinical algorithm for Radiology. It provides a structured decision tree to guide clinical decision-making, based on ACR Guidance Document on MR Safe Practices.

What guideline is the MRI Safety Screening Protocol (ACR) based on?

This algorithm is based on ACR Guidance Document on MR Safe Practices (DOI: 10.1002/jmri.26637).

What are the limitations of the MRI Safety Screening Protocol (ACR)?

Known limitations include: Device databases not exhaustive; New devices may lack safety data; Field strength and SAR limits vary. Individual patient factors may require deviation from these recommendations.

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