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.
Quick Answer. Common causes of swelling in the legs and feet include poorly functioning veins, pregnancy complications, heart disease, infections and blood clots, according to WebMD. In some cases, swollen feet and ankles occur as a normal result of heavy walking or as a side effect from certain medications. Continue Reading.