In Table 5.5 we summarize the theoretical techniques used
to calculate the SAR in models of man and animals. The table
is divided into three basic divisions according to how
complex the model's shape is. The one-dimensional models are
the simplest and are particularly useful at higher
frequencies where the body curvature can be neglected. Such
models, however, cannot predict body resonance that occurs in
three-dimensional models. The two dimensional models are
basically single or multilayered cylindrical geometries
suitable to simulate limbs. The three-dimensional case
includes models of idealized shapes, such as spheres,
spheroids, and ellipsoids, as well as more realistic block
models of man.
#### Table 5.5

Comparison of Theoretical Methods Used In Literature to Calculate The Power Absorption by Biological Models

**Go to Chapter 6.1.**

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Last modified: June 14, 1997

© October 1986, USAF School of Aerospace Medicine, Aerospace Medical Division (AFSC), Brooks Air Force Base, TX 78235-5301