What is the difference between a CT scan and a coronary CTA?

I'm 52 year old and male, and I'll have a coronary CTA done on me in the next week and a half. How does this differ from a CT scan?

Coronary CTA gives diagnoses of blockages, and structure anatomy of heart which is moving.

It is a specialized CT scan of the heart that require injection of a bolus of intravenous contrast to evaluate the coronary arteries.