This study extends the results of Drossos et al. (2000) to all body tissues with respect to worst-case exposure. The analysis shows a significant increase of 2.2-4.7 dB of the peak spatial specific absorption rate (SAR) in comparison to the values assessed with current standard liquids as a result of standing-wave effects in tissues with low water content. Significant enhancements can be found at distances smaller than 3. Nevertheless, a sound conservative exposure assessment applying phantoms filled with homogeneous standardized liquids is possible if a distance and frequency-dependent scaling factor is applied.