第一,对于人体胸部的放射性照射,比如,放射性疗法。
第二,住宅或办公室内的氡气。
第三,对人体的图像扫描,比如,CT。
第四,原子弹爆炸的辐射。
Being exposed to radiation from any of the following:
Radiation therapy to the breast or chest.
Radon in the home or workplace.
Imaging tests such as CT scans.
Atomic bomb radiation.