In digital radiography the sensors shape a plate, but in the EOS system, which is a slot-scanning system, a linear sensor vertically scans the patient. Plain radiography was the only imaging modality available during the first 50 years of radiology.
4) Pregnancy. Pregnancy is another of the common causes of swollen feet and ankles. There are three reasons for this: a) the excess weight gained puts more pressure on the legs and feet. b) the expanding uterus can place pressure on the blood vessels for the legs and. c) pregnancy hormones cause the body to retain fluids.
Injury to the Feet and Ankles. Another cause of foot and ankle swelling is injury or trauma to the feet. When the tissues and muscles of the feet and ankles are strained or damaged, they will become inflamed and fill with blood, causing swelling. A sprained ankle, foot, or broken bone in the foot will usually cause a large amount of swelling, especially in the days immediately following the injury.