CAT Scan (Computerized Tomography And CT Scan)
Here's your citation in American Psychological Association (APA) format:
CAT Scan (Computerized Tomography And CT Scan). (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=CAT+Scan+%28Computerized+Tomography+And+CT+Scan%29