If the brain scan called PET

I just wonder if that Brain Scan is callled PET Scan. I have had MRI”S of the brain and a PET Scan. Then way before Christmas I had an Endoscopy and they placed this capsule in the Esophagus and I had to wear a monitor for 24 hours measuring my stomach acids. Forgot what they called that test. The Endoscopy was easy but that capsule was a tiny bit uncomfortable. Not bad but I felt like a small pinching sensation. Then it eventually goes away and you end up passing it through the bowel. Really great test though to measure Gerd with.
You know! I was scared to death of something going down my throat. But that was easy! The Colonospy on the other hand I hate having done. Last one was before Christmas too and I woke up right in the middle of the procedure! LOL! They had to resadate me.When I came to I remembered what happened! LOL!