THERAPEUTIC APPLICATIONS OF ELECTROMAGNETIC POWER
A. W. GUY, J. F. LEHMANN, J. B. STONEBRIDGE · 1974
Medical diathermy proves microwave frequencies can deeply penetrate and heat human tissue at specific power levels.
Plain English Summary
This 1974 research examined therapeutic uses of electromagnetic power in medical treatments, specifically shortwave (27.33 MHz) and microwave (2450 MHz) diathermy for heating deep tissues. The study found that therapeutic benefits occur when tissue temperatures reach 41-45°C, requiring power densities of 50-170 W/kg, and that 915 MHz frequency transfers power more efficiently than 2450 MHz.
Why This Matters
This foundational research reveals a critical reality about microwave energy that often gets overlooked in today's EMF discussions. The power densities required for therapeutic heating (50-170 W/kg) are thousands of times higher than typical cell phone exposures, which operate around 0.001-2 W/kg. However, the study's finding that 915 MHz frequency is more efficient at penetrating deep tissues than 2450 MHz has important implications. Many of today's wireless devices operate near this more penetrating frequency range, including some cell towers and WiFi systems. While therapeutic diathermy requires intense, localized heating for short periods under medical supervision, our modern environment exposes us to these same frequencies continuously at lower levels. The question isn't whether these frequencies can affect human tissue - this study proves they can - but rather what chronic, low-level exposure might mean for our health over decades of use.
Finding
Experimental and clinical research indicates that these responses will occur as a result of elevating the tissue temperatures in the range 41° to 45°C requiring absorbed power densities from 50 to 170 W/kg in the deep tissues where treatment is desired.
In their words
“Experimental and clinical research indicates that these responses will occur as a result of elevating the tissue temperatures in the range 41° to 45°C requiring absorbed power densities from 50 to 170 W/kg in the deep tissues where treatment is desired.”
Figures from the Original Paper
Diagrams extracted from the original research document.
Exposure Information
Specific exposure levels were not quantified in this study.
Show BibTeX
@article{therapeutic_applications_of_electromagnetic_power_g4100,
author = {A. W. GUY and J. F. LEHMANN and J. B. STONEBRIDGE},
title = {THERAPEUTIC APPLICATIONS OF ELECTROMAGNETIC POWER},
year = {1974},
}