ISO TS 10974:2012

Overview

ISO/TS 10974:2012 sets forth technical specifications for the assessment of the safety of magnetic resonance imaging (MRI) for patients who have active implantable medical devices (AIMDs). Developed by the International Organization for Standardization (ISO), in collaboration with the International Electrotechnical Commission (IEC), this standard is particularly applicable to implantable components of AIMDs intended for use in patients undergoing MRI scans with 1.5 Tesla (T) cylindrical bore, whole-body scanners for hydrogen nucleus imaging.

By providing structured test methods, ISO/TS 10974:2012 supports manufacturers, researchers, and regulatory professionals in systematically evaluating how AIMDs interact with the electromagnetic and magnetic fields generated by MRI systems. The goal is to mitigate patient risks such as device malfunction, excessive heating, vibration, or image artifacts during MRI procedures.

Key Topics

• Hazard Identification: Focuses on interactions between AIMDs and MRI scanners, outlining potential hazards such as RF-induced heating, gradient-induced heating and vibration, force and torque effects, and device malfunction.
• Test Methods: Details bench-top testing using simulated fields to characterize device responses to:
  • Static magnetic field exposure
  • Gradient magnetic field exposure
  • Radio-frequency (RF) fields
• Tiered Testing: Introduces a multi-level test approach to address hazards at varying levels of complexity and device function.
• Validation & Compliance: Guidance on validating test equipment, simulation models, and measurement systems, as well as documentation practices for test results and uncertainty assessment.
• Operational Limitations: The tests are intended for type-testing of AIMDs, not for routine product verification, and focus on implantable components only.
• Specific vs. General Application: While the specification is comprehensive for a broad range of AIMDs, it leaves product-specific adaptations and risk determinations to relevant committees and regulatory bodies.

Applications

ISO/TS 10974:2012 is widely relevant in the medical device industry for ensuring the MRI safety of AIMDs, including:

• Device Manufacturers: Supports development, validation, and labelling of MRI-conditional AIMDs, ensuring regulatory and market compliance.
• Clinical Risk Management: Aids healthcare providers and hospital safety officers in understanding safety concerns linked to MRI for patients with AIMDs.
• Regulatory Submissions: Serves as a reference for demonstrating conformity in regulatory dossiers to authorities and notified bodies.
• Research & Development: Facilitates the design and preclinical evaluation of new AIMDs by providing a standard testing framework.
• Quality Assurance: Introduces guidelines for test reporting, uncertainty estimation, and method validation relevant to quality control teams.

This standard ultimately contributes to enhanced patient safety by minimizing the risk of adverse events during MRI scanning for individuals with implanted electronic devices.

Related Standards

Organizations referencing ISO/TS 10974:2012 may also consider the following related standards for comprehensive MRI safety and medical device compliance:

• IEC 60601-2-33: Medical electrical equipment – Part 2-33: Particular requirements for the basic safety and essential performance of magnetic resonance equipment for medical diagnosis.
• IEC 61000-4-3: Electromagnetic compatibility (EMC) – Testing and measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test.
• ISO/TC 150/SC 6 Standards: Additional ISO documents relating to implants for surgery and specific product categories of AIMDs.

For device-specific requirements or compliance criteria, relevant product-specific standards and guidance from regulatory agencies should also be consulted.

Keywords: ISO TS 10974:2012, MRI safety, active implantable medical device, AIMD, magnetic resonance imaging, bench-top testing, device risk, patient safety, IEC 60601-2-33, electromagnetic compatibility, medical device standards