Depends on who's asking. For the Federal government, gross income is income from all sources- earned and unearned. Unearned income is your money making money- investments, dividends, capital gains, sale of property. Earned income is, well, what you actually toiled to attain, like wages, consultation fees, jury duty payment, etc.
Coronary artery calcification is the result of calcium deposition in the coronary arteries. Coronary arteries are blood vessels that deliver blood supply to the heart for its nourishment and oxygen needs.
Coronary angiography, more commonly called cardiac catheterization, is a definitive test for coronary artery disease (CAD). CAD is a condition where the blood vessels to the heart lose their elasticity and become narrowed by atheroslerotic deposits of plaque.