X光機周遭環境的空間曝露

Radiation Exposure around an X-ray Machine

陳拓榮(Tou-Rong Chen)

《中華放射線醫學雜誌》 24卷5期 (1999/10) Pp. 195-200

摘要

本文以熱發光劑量計(TLD)作立體空間的佈點，量測分析X光機周遭的空間劑量。結果發現在主射束外的空間劑量分佈具方向性，靠陰極端劑量較大。不同方向平均的最大和最小劑量，最多可達5倍之相差量。離中心射束越遠，所受的輻射劑量越低。射束中心點劑量和離中心點50公分1100公分1150公分各方向的平均劑量比為1: 0.016: 0011: 0.008。另外，比較各層不同高度的劑量，發現其差異並不明顯。

關鍵字

曝露 ； 劑量 ； 熱發光劑量計

並列摘要

The thermoluminescent dosimeters were arranged in a three-dimensional pattern to measure radiation exposure around an x-ray machine. The results show that the dose distribution outside the x-ray beam has an orientation selection. The dose on the cathode side is larger than that on the anode. The maximum dose in eight directions was five times to the minimum dose. The ratio of the doses at the position of central x-ray beam to positions of 50 cm, 100 cm, and 150 cm away from the central beam was 1: 0.016: 0.011: 0.008. The farther the distance from the x-ray beam, the lower the exposure. In addition, the average dose difference was insignificant at planes of 80 cm, 130 cm and 180 cm above the ground.

並列關鍵字

Exposure ； Dose ； Thermoluminescent dosimeters