頸椎撮影時の乳房と眼の遮蔽の有効性．実験的研究

Effectiveness of Breast and Eye Shielding During Cervical Spine Radiography: An Experimental Study.

• Wiam Elshami
• Mohamed M Abuzaid
• H O Tekin

抄録

目的:

本研究では、乳房と眼の遮蔽の有効性を評価し、頸椎X線撮影時の散乱放射線による放射線感受性組織（眼と乳房）への放射線量を測定した。

Purpose: This study assessed the effectiveness of breast and eye shielding and measured the radiation dose to radiosensitive tissues (eyes and breasts) due to scatter radiation during cervical spine X-ray radiography examinations.

方法:

擬人化されたファントムを用いて、目と乳房にリードシールドを配置する前と後の散乱放射線量を、前側方（AP）および左側方投影における目と乳房の上に測定した。被曝量の決定には回帰式を用いた。胸と目の線量の平均値と標準偏差を計算した。対の2標本のt検定を用いて、シールド設置前後の記録された線量を比較した。

Methods: Using an anthropomorphic phantom, the scattered radiation dose was measured before and after the placement of the lead shield over the eyes and breasts in the anteroposterior (AP) and left lateral projection. A regression formula was utilized to determine the exposure. Mean values and standard deviation of breasts and eyes doses were calculated. The paired two sample t-test was used to compare the recorded dose before and after shielding placement.

結果:

AP頸椎X線撮影時の目と乳房の放射線遮蔽は、乳房の放射線量をそれぞれ99.9％、左目と右目の放射線量をそれぞれ91％、89％減少させた。左側外側頸椎X線では、左目と右目の放射線量がそれぞれ26％と31％、左と右の乳房の放射線量がそれぞれ23％と99％減少した。また、眼と乳房の遮蔽を実施する前と実施後の線量を比較したところ、有意な差が認められた。

Results: Radiation shielding of eyes and breasts during AP cervical spine X-ray decreased radiation dose to the breasts by 99.9% and to the left and right eye by 91% and 89%, respectively. For the left lateral cervical spine X-ray, the radiation dose decreased by 26% and 31% for the left and right eye, respectively, and by 23% and 99% for the left and right breast, respectively. A significant difference was noted comparing the dose before and after the implementing shielding on the eye and breast.

結論:

提示された結果によると、特に関心のある領域ではないが散乱放射線にさらされていることを考慮すると、線量は有意に低減されている。

Conclusion: According to the results presented, the dose is significantly reduced, especially considering that they are not in the area of interest but are exposed to scatter radiation.

© 2020 Elshami et al.