Source:http://linkedlifedata.com/resource/umls/id/C1301886
NCI: The length of a straight line that extends from one edge of a tumor or other object, through its center and to the opposite edge. It is usually used to measure the size of round or spherical shapes.,NCI: The length of a straight line passing through the center of a circle or sphere and connecting two points on the circumference. (NCI),NCI: The length of a straight line passing through the center of a circle or sphere and connecting two points on the circumference.