[Measurement of MRI scanner noise].
The present paper describes a simple method for the analysis of MRI scanner noise. Besides the heating of body tissue by strong RF radiation and the formation of circular currents in the body induced bey switching field gradients, a noise level of more than 100 dB(A) during the measurement belongs to the potential risks of MRI. This risk is of particular concern for staff and accompanying persons who remain close to the scanner for different reasons (e. g., monitoring of anesthetized patients, reassuring of children). For this reason, and given the scanty information on noise provided in the manuals of the scanners, it is useful to quantify the noise level more exactly. This applies also to the evaluation of different sound-reducing methods for the patient. This presents the results of noise level measurements in the tomograph and in its surrounding, with and without noise reduction by headphones.
Knörgen
Manfred
M
Klinik für Diagnostische Radiologie, Klinikum der Martin-Luther-Universität Halle-Wittenberg, Halle. Knoergen@physik.uni-halle.de
Spielmann
Rolf Peter
RP
Haberland
Ernst-Jürgen
EJ
Melkus
Gerd
G
D001831:Body Temperature; D002138:Calibration; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000009:adverse effects / Q000379:methods*; D009622:Noise / Q000009:adverse effects