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.
Your feet and ankles swell when fluid in the blood escapes from capillaries and accumulates in tissues, a condition known as peripheral edema. Causes range from benign to serious and include being overweight, long periods of standing, lengthy car or airplane rides, warm weather, and menstrual periods.