Sticky and Sweet
toefl speaking 6

contour /ailment /appreciable /tumor /conventional /

Traditional X-rays and innovative CT scanners both use X-ray radiation and rely on the same basic technology. In addition , they’re both used in medicine to check for illness or injury in the body. However, there are a number of important differences between them. X-rays take snapshots which are analyzed individually , but CT scans give us a more complete picture of the body , the rays are moving through the body from different angles. Doctors still prefer X-rays for searching for simple things, like broken bones, but for brains or other subtle damage to the body, CT scans are more effective. In addition, X-rays can be taken from almost any angle or position, but for CT scans the patient must lie down and pass through a machine. This takes longer than X-rays. Still, some of the newest CT scanners are quite fast and they save a lot of lives because they examine badly hurt victims so completely and quickly.