SAR Average Tool

Systems transmitting electromagnetic waves need to satisfy safety requirements to prevent drastic change in temperature in the body tissues who are exposed to the waves. Some limits have been imposed to Specific Absorption Rate (SAR) values to indirectly control the possible temperature increase into the body: these limits involve the local peak of SAR, the peak of the local averaged SAR on tissue volume of either 1-gram or 10-grams mass, the total absorbed SAR. A Matlab tool able to compute n-grams mass local average SAR is provided here, which uses adaptive spherical masks.

The function is defined as

function SARave = SARavesphnp (MaterialDensity, SAR, a, b, c, grams)

where

MaterialDensity: The 3D matrix containing the 3D spatial distribution of the material density distribution
SAR: The 3D matrix describing the 3D spatial SAR distribution
a, b, c: The x, y, z, cell resolution in meters (commonly 2 mm each)
grams: The mass in grams of the volumes where the SAR average is computed (commonly 1g or 10g)

Related Publication

This tool has been presented in international symposia and published in the following article. Please consider citing this article if you have found this tool useful.

G. Carluccio, D. Erricolo, S. Oh, C. M. Collins, "An Approach to Rapid Calculation of Temperature Change in Tissue Using Spatial Filters to Approximate Effects of Thermal Conduction", in IEEE Trans. on Biomedical Engin., (Early View).

For questions, do not hesitate to contact Giuseppe Carluccio at the email address giuseppe.carluccio@nyumc.org.