2020 年 Annual58 巻 Abstract 号 p. 353
Recently, electromagnetic interferences by telemeters between neighboring hospitals have often been reported. In this study, we measured the outdoor electromagnetic fields emitted from medical telemeters installed in a hospital. Transmitters(1mW) were installed in the 13th and 15th(roof) floors of Kawasaki Medical School General Medical Center (Okayama, Japan). Using a spectrum analyzer, we measured the strength of the electromagnetic fields leaked from the hospital up to 1300m in four directions at 22 locations. In the directions toward the suburbs, the average values were lower than the corresponding theoretical values by 19.2dB or 15.4dB independent of distance. In the direction toward the downtown, the average values were lower than the corresponding theoretical values by more than 30.0dB at some locations. This method can thus be a new index allowing us to estimate the level of the information leakage from medical telemeters installed in a hospital located both in downtown and suburb areas.
