Study type: Medical/biological study (experimental study)

The Effects of Whole Body Cell Phone Exposure on the T1 Relaxation Times and Trace Elements in the Serum of Rats med./bio.

Published in: Electromagn Biol Med 2004; 23 (3): 7-17

Aim of study (acc. to author)

To study the effects of radiofrequency irradiation emitted from cellular phones on 1) trace elements such as manganese, iron, copper, zinc, 2) T1 relaxation times in serum, and 3) rectal temperature of rats.



Exposure Parameters
Exposure 1: 890–915 MHz
Modulation type: pulsed
Exposure duration: repeated daily exposure, 20 min/day, 7 days a week for 1 month

General information

16 rats were divided into equally into exposure and sham exposure group.

Exposure 1

Main characteristics
Frequency 890–915 MHz
Exposure duration repeated daily exposure, 20 min/day, 7 days a week for 1 month
Modulation type pulsed
Repetition frequency 217 Hz
Exposure setup
Exposure source
Distance between exposed object and exposure source 0.005 m
Chamber Plexiglas cages (20 cm x 10.5 cm x 10 cm) with ventilation holes
Setup Rats were confined in the cages with the mobile phones placed 0.5 cm under the cages
Measurand Value Type Method Mass Remarks
electric field strength 13.59 V/m mean measured - -
power density 47 µW/cm² mean measured - -
SAR 290 µW/g mean measured whole body to 870 µW/g

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • before exposure
  • after exposure

Main outcome of study (acc. to author)

T1 relaxation time and the concentrations of iron and copper in the serum of the exposed group were not changed compared to the control group. However, manganese and zinc values of the exposed animals were significantly different from the control animals. The difference in rectal temperature measured before and after irradiation in the exposed animals was not statistically different from control.

Study character:

Study funded by

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