As noted above, usually a gown is worn and metal containing materials are removed from the body before an x-ray is taken. pregnant women need to notify the doctor and the technician as some or all images may not be taken in order to avoid unnecessary x-ray radiation exposure to the fetus. precautions, such as, protective lead covers may be placed on the abdomen to avoid radiation to the fetus when an x-ray is absolutely necessary. If your doctor thinks you might have lung cancer -for instance, because you have a long-lasting cough or wheezing -you’ll get a chest x-ray or other imaging tests. you may also need to cough up. See full list on healthline. com. On the other hand, the lung tissue, which is mostly composed of air, will allow most of the radiation to pass through, developing the film to a darker appearance. the heart and the aorta will appear whitish, but usually less bright than the bones, which are more denser. like gum disease what is it gum disease x ray gum disease xylit...