There are gaps, air with respiratory droplets containing the virus can leak in and out around the edges of the mask (on the top or the sides). to help prevent air leakage, masks should fit snugly against the sides of the face and not have gaps.
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Mammography images are created by the process of x-rays passing through breast tissue and interacting with a digital detector. The anode in the x-ray tube used for mammography is made of molybdenum, or rhodium, rather than tungsten which is commonly used in general x-ray tubes. For more information about x-ray formation see the previous section (X-rays).
