The distance from patient to personnel has a strong effect on the absorbed radiation dose. According to the inverse square law, exposure to radiation diminishes with the square of the distance. So, doubling the distance from the source will result in a reduction of exposure by 75%. According to international regulations, no additional safety measures are required if the dose rate is below 0.5 |j,Sv/h. At that rate, the annual dose will remain below 1 mSv (0.5 |j,Sv/h X 40 h X 50 weeks = 1000 |j,Sv = 1 mSv). Except for the surgeon and, possibly, his first assistant, other employees in the operating room will usually be at a distance of more than 1 m from the patient and will fall within this dose rate (Table 2). The radiation dose to the pathologist will also be low compared with that of the surgeon because of only a brief contact with the specimen, and usually after a delay of many hours following operation.
Was this article helpful?
Complete Guide to Preventing Skin Cancer. We all know enough to fear the name, just as we do the words tumor and malignant. But apart from that, most of us know very little at all about cancer, especially skin cancer in itself. If I were to ask you to tell me about skin cancer right now, what would you say? Apart from the fact that its a cancer on the skin, that is.