What is the SAR limit for the head in First Level Mode?

The Specific Absorption Rate (SAR) limit for the head in First Level Mode is set at 3.2 W/kg. This limit is established to ensure safety during Magnetic Resonance Imaging (MRI) procedures. SAR is a measure of the rate at which energy is absorbed by the body when exposed to a radiofrequency field, and it is crucial to keep it within specified limits to avoid adverse thermal effects.

First Level Mode indicates a usage scenario where the system is in a standard, safe operation for the patient. The regulations surrounding SAR values are designed to mitigate risks associated with excessive heating of biological tissues, which can potentially lead to burns or other tissue damage. By adhering to the 3.2 W/kg limit for the head, MRI practitioners ensure that safety protocols are maintained, preserving patient well-being while also allowing for effective imaging techniques.

Establishing an understanding of the SAR limits is critical for anyone involved in MRI procedures, as it influences how equipment is operated and informs risk assessments related to patient safety.