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The effect of microwave diathermy on the peripheral circulation and on tissue temperature in man

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Gersten JW, Wakim KG, Herrick JF, Krusen FH · 1949

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This 1949 study pioneered human microwave exposure research, investigating circulation and heating effects that remain relevant to modern wireless safety.

Plain English Summary

Summary written for general audiences

This 1949 study examined how microwave radiation affects blood circulation and tissue temperature in humans. The research was conducted during the early development of microwave technology, when scientists were exploring therapeutic applications using magnetron oscillators that could generate focused microwave energy.

Why This Matters

This research represents a fascinating glimpse into the earliest human microwave exposure studies, conducted just as the technology was emerging from military secrecy. What makes this particularly relevant today is that it documents the very beginning of deliberate human microwave exposure research - decades before anyone conceived of carrying microwave-emitting devices in our pockets. The study's focus on circulation and tissue heating effects mirrors concerns we have today about thermal effects from wireless devices, though modern exposures are typically much lower power. The reality is that this 1949 research laid groundwork for understanding how microwaves interact with human tissue, knowledge that remains foundational to current safety standards. While the specific frequencies and power levels differ from today's wireless technologies, the basic biological mechanisms of microwave absorption remain unchanged.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Gersten JW, Wakim KG, Herrick JF, Krusen FH (1949). The effect of microwave diathermy on the peripheral circulation and on tissue temperature in man.
Show BibTeX
@article{the_effect_of_microwave_diathermy_on_the_peripheral_circulation_and_on_tissue_te_g7012,
  author = {Gersten JW and Wakim KG and Herrick JF and Krusen FH},
  title = {The effect of microwave diathermy on the peripheral circulation and on tissue temperature in man},
  year = {1949},
  
  
}

Quick Questions About This Study

This 1949 research examined how microwave radiation affected blood circulation and tissue temperature in humans, representing some of the earliest deliberate microwave exposure testing on people during the technology's initial development.
Scientists began studying microwave effects on human circulation in 1949, just after World War II when magnetron technology became available for civilian research rather than military radar applications.
The multicavity magnetron, developed by the British by 1940 and brought to America, provided sufficient power output to generate therapeutic levels of microwave energy for the first human exposure studies.
The 1949 study used microwave frequencies between 300-300,000 megacycles (MHz), a range that encompasses many modern wireless technologies including WiFi, Bluetooth, and cellular signals, though at much higher power levels.
Military use of magnetron technology during World War II prevented investigation of therapeutic applications until after the war ended, when the technology became available for civilian medical research.