发光二极管白光灯在MR机房照明中的应用研究

The application of the light emitting diode in MR room lighting

目的探讨用发光二极管白光灯（LED）替代白炽灯在MR机房中的应用，解决白炽灯在强磁场环境下易损坏问题，并达到节能降耗的目的。方法在MR机房内分别观察300h使用白炽灯和LED的损坏数目，进行对照研究，对取得数据用Χ^2检验进行统计学处理，并比较安装两者后机房内工作面照度值及50000h理论耗电量。结果白炽灯和LED300h的损坏数目分别为32和2只，两者之间比较差异有统计学意义（Χ^2=48．813，P=0．000）。0．75m水平面照度白炽灯为100lx，LED为155lx。50000h耗电量白炽灯为5000kW，LED为200kW。结论用白光LED代替白炽灯在MR机房的照明具有明显优越性。

Objective To investigate the application of white light emitting diode （LED） in magnetic resonance room, in order to resolve the damageable problem of incandescent lights under the high magnetic field. Methods The white LEDs and the incandescent lights were installed in MR room, the number of damaged lights was compared after 300 hours. Chi-square test was used for the statistical analysis. And the illuminance and 50 000 hours electricity consumption between LED and incandescent lights were calculated. Results The number of damaged LED and incandescent lights was 2 and 32, respectively and there was a significant difference （Χ^2 = 48. 813 ,P = 0. 000）. The illuminance of the LED and incandescent lights was 155 lx and 100 lx at the 0. 75 m horizontal level and the 50 000 hours electricity consumption was 200 kW and 5000 kW, respectively. Conclusion It is feasible and a great advantage to use the white LEDs in MR room lighting.