The cardiothoracic ratio aids in the detection of cardiomegaly, or more broadly, enlargement of the cardiac silhouette. It is measured on a PA chest x-ray, and is the ratio of:
Disability around the World: It's estimated that more than 1 billion people live with a disability. (United Nations, 2013) This represents the worldâs largest minority, and the only minority group that any of us can become a member of at any time.
Other highlights: 1  People in the oldest age group â 80 and older â were about eight times more likely to have a disability as those in the youngest group â younger than 15 (71 percent compared with 8 percent).  About 8.1 million people had difficulty seeing, including 2.0 million who were blind or unable to see.