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 One in five Americansâabout 53 million peopleâhas a disability of some kind.  33 million Americans have a disability that makes it difficult for them to carry out daily activities; some have challenges with everyday activities, such as attending school or going to work, and may need help with their daily care.