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Active Implantable Medical Devices (AIMDs)

ISO/TS 10974

Active implantable medical devices (AIMDs) are implanted devices that depend on an external energy source, usually electrical, for their functionality. Common examples of AIMDs include pacemakers, neurostimulators, and implantable defibrillators.

Compared to passive implantable medical devices, AIMDs pose additional risks to patients in the magnetic resonance imaging (MRI) environment, such as unintended device stimulation and device malfunction. Additionally, evaluation of radiofrequency-induced heating of AIMDs with long metallic leads requires a more rigorous approach than passive implants because of the lead path-dependent nature of heating.

Our team of engineers and scientists can evaluate all potential hazards of AIMDs according to ISO/TS 10974, provide MRI safety labeling to be used in the instructions for use (IFU), and help support regulatory submissions.

ISO/TS 10974 Evaluations:




RF-induced heating, Gradient-induced heating


Gradient-induced vibration


Magnetically induced displacement force


Magnetically induced torque

Unintended Stimulation

Gradient-induced lead voltage, RF injection testing to test for rectification

Device Malfunction

B0-induced device malfunction, RF injection testing to test for malfunction and rectification, Gradient-induced device malfunction, Combined fields


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