MRI Machine EMF Research

Symposium on Electromagnetic Fields in Biological Systems

Stanislaw S. Stuchly · 1978

CONSIDERATIONS AND CRITERIA FOR A RECOMMENDED STANDARD FOR OCCUPATIONAL EXPOSURE TO RADIOFREQUENCY AND MICROWAVE FIELDS

Unknown authors · 1978

This 1978 NIOSH technical report established criteria and considerations for recommended standards protecting workers from radiofrequency and microwave field exposures. The document addressed occupational safety limits for RF/microwave radiation in workplace environments. This represents early government recognition that RF and microwave exposures required formal worker protection standards.

An Analysis Of Radiofrequency And Microwave Absorption Data With Consideration Of Thermal Safety Standards

Richard A. Tell · 1978

This 1978 EPA technical report analyzed how radiofrequency and microwave radiation is absorbed by biological tissue, specifically examining thermal safety standards used to protect people from heating effects. The study represents early government efforts to establish exposure limits based on the assumption that heating is the primary health concern from RF radiation.

MEASUREMENT OF POTENTIALLY HAZARDOUS ELECTROMAGNETIC FIELDS--RF AND MICROWAVE

Unknown authors · 1978

Instruments should read average power density, mean squared electric field strength, mean squared magnetic field strength, or energy density. Calibration methods include free-space standard field, guided wave methods, and standard probe method.

Health Aspects of Radio Frequency and Microwave Radiation Exposure Part 2

Unknown authors · 1978

RF Cell Culture Irradiation System with Controlled Temperature and Field Strength

Arthur W. Guy · 1977

The system was designed for the National Institute for Occupational Safety and Health to determine human RF exposure thresholds in the frequency range D.C. to 100 MHz. The final design uses concentric stainless steel rings with a teflon bottom that forms a liquid-tight seal compressed by brass retainer clamps.

RF Cell Culture Irradiation System with Controlled Temperature and Field Strength

Arthur W. Guy · 1977

This 1977 NIOSH technical report describes the development of a radiofrequency (RF) cell culture irradiation system capable of controlling both temperature and electromagnetic field strength. The research focused on creating standardized laboratory equipment for studying how RF radiation affects living cells in controlled conditions. This represents early foundational work for understanding cellular responses to electromagnetic field exposure.

AN OUTLINE OF PROCEDURES AND APPROPRIATE INSTRUMENTATION FOR CONDUCTING RADIO FREQUENCY ELECTROMAGNETIC PERSONNEL HAZARD SURVEYS

Maj R. B. Graham, Capt John M. Hemphill · 1977

Results at the development of one near field strength meter at the measurement of the electrical component of the electromagnetic r.f.-field in the GDR

Eggert, S., Goltz, S., Kupfer, J. · 1977

An Investigation of Broadcast Radiation Intensities at Mt. Wilson, California

Richard A. Tell, Patrick J. O'Brien · 1977

RF Cell Culture Irradiation System with Controlled Temperature and Field Strength

Arthur W. Guy · 1977

NIOSH researchers developed a specialized laboratory system in 1977 for exposing cell cultures to radiofrequency (RF) radiation while precisely controlling temperature and electromagnetic field strength. This technical report describes equipment designed to study how RF energy affects living cells under controlled laboratory conditions. The system represented early efforts to standardize RF exposure research and eliminate confounding variables like heat effects.

Measurement of RF Power-Absorption in Biological Specimens

Frank M. Greene · 1977

OCCUPATIONAL SAFETY AND HEALTH CASES – SWIMLINE CORPORATION

Unknown authors · 1977

Measurement of RF Power-Absorption in Biological Specimens (10 to 100 MHz)

Frank M. Greene · 1977

The exact measurement point on the feed line is not critical, and measurements can be made at full operating power without interrupting exposure tests. In an example with 100 watts forward power and 11.1 watts reflected power, the specimen absorbed 44.4 watts, which is half the load power. The absorbed power can never exceed half the forward power, reaching this maximum when reflected power is 25 percent of forward power.

RF Radiation Absorption Patterns: Human and Animal Modeling Data

Arthur W. Guy, Michael D. Webb, John A. McDougall · 1977

FCC's role in the Biological Effects of Nonionizing Radiation - Notice of Inquiry

Unknown authors · 1977

The role of radio science in investigating electromagnetic biological hazards

Curtis C. Johnson · 1977

RF Dielectric Properties Measurement System: Human and Animal Data

J. Toler, J. Seals · 1977

Statement of Dr. John M. Osepchuk before the United States Senate Committee on Commerce, Science, and Transportation

John M. Osepchuk · 1977

BIOTELEMETRY ANTENNAS IN BIOMECHANICS: THE PROBLEM OF SMALL BODY-MOUNTED ANTENNAS

NEUKOMM Peter A. · 1977

Maximum transmission loss increased from 20 to 30 dB as frequency rose from 200 to 1000 MHz at a 35 mm distance, and from 17 to 24 dB at a 77 mm distance over the same frequency range. The study concluded that ideal telemetry frequencies lie within 75-150 MHz, where losses stay below 18 dB at 35 mm and below 14 dB at 77 mm antenna-trunk distance. The flat helical dipole was recommended as the best antenna for biomechanics telemetry because varying body distance does not detune it out of its bandwidth.

RF Radiation Absorption Patterns: Human and Animal Modeling Data

Arthur W. Guy, Michael D. Webb, John A. McDougall · 1977

This 1977 government study examined how radiofrequency radiation is absorbed by human and animal bodies, creating mathematical models to predict absorption patterns. The research established foundational methods for understanding how RF energy penetrates and distributes throughout biological tissues. This work became crucial for developing safety standards and exposure limits still used today.

RF Dielectric Properties Measurement System: Human and Animal Data

J. Toler, J. Seals · 1977

This 1977 NIOSH government report documented the development of measurement systems for studying how radiofrequency (RF) electromagnetic fields interact with human and animal tissue. The research focused on measuring dielectric properties, which determine how biological tissues absorb and conduct electromagnetic energy. This work provided foundational data for understanding RF exposure effects in living organisms.

RF Dielectric Properties Measurement System: Human and Animal Data

J. Toler, J. Seals · 1977

This 1977 NIOSH government report documented the development of a measurement system for studying how radiofrequency radiation interacts with human and animal tissue at the cellular level. The research focused on measuring dielectric properties, which determine how biological tissues absorb and respond to RF energy. This foundational work helped establish scientific methods for understanding RF exposure effects in living organisms.

Measurement of RF Power-Absorption in Biological Specimens

Frank M. Greene · 1977

This 1977 technical report by Frank Greene focused on developing methods to measure how much radiofrequency (RF) power biological specimens absorb when exposed to electromagnetic fields. The research established foundational measurement techniques for quantifying RF energy absorption in living tissue, which became critical for understanding potential health effects from wireless technologies.

Statement of Dr. John M. Osepchuk before the United States Senate Committee on Commerce, Science, and Transportation

John M. Osepchuk · 1977