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.
How many people have ever lived on earth? February 7, 2017 33 Comments Estimates of âthe total number of people who have ever livedâ published in the first decade of the 21st century range approximately from 100 to 115 billion.