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.
1 Worldwide, between 300 million and 400 million people are visually impaired due to various causes. 2  Of this group, approximately 50 million people are totally blind, unable to see light in either eye. 3  Eighty percent of blindness occurs in people over 50 years old.