Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A single axial image from the CT angiogram showing severe dilation of the main pulmonary artery and the right and left branch pulmonary arteries. Normally, the main pulmonary artery has an equal or smaller diameter than the ascending or descending aorta. MPA = main pulmonary artery; LPA = left pulmonary artery; RPA = right pulmonary artery; A1 = ascending aorta; and A2 = descending aorta.
