Study type: Medical/biological study (experimental study)

Skin temperature increase during local exposure to high-power RF levels in humans med./bio.

By: van den Bergh AJ, van den Boogert HJ, Heerschap A
Published in: Magn Reson Med 2000; 43 (3): 488-490
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Aim of study (acc. to author)

To investigate if exposure to high local SAR levels applied with a surface coil could result in skin temperatures above the recommended criteria for safe magnetic resonance operation.

Endpoint

Exposure

Exposure Parameters
Exposure 1:
Exposure duration: 60 min
Exposure 2:
Exposure duration: 60 min
Exposure 3:
Exposure duration: 60 min

Exposure 1

Main characteristics
Type
Exposure duration 60 min
Modulation
Modulation type unspecified
Exposure setup
Exposure source
Setup Subjects laid in a surpine position with the calf muscle of the right leg positioned on the double surface coil.
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 1.5 T unspecified calibration - -
SAR 6.5 mW/g unspecified calculated unspecified -

Exposure 2

Main characteristics
Type
Exposure duration 60 min
Modulation
Modulation type unspecified
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 1.5 T unspecified calibration - -
SAR 12 mW/g unspecified calculated unspecified -

Exposure 3

Main characteristics
Type
Exposure duration 60 min
Modulation
Modulation type unspecified
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
SAR 22 mW/g unspecified calculated unspecified -
magnetic flux density 1.5 T unspecified calibration - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • during exposure

Main outcome of study (acc. to author)

Although the maximum values of each temperature curve correlated with the applied superficial SAR levels, these values did not exceed the recommended temperature limit for the extremities such given by the Food and Drug Administration (FDA).

Study character:

Study funded by