Why do i see spots in my brain ct scan?

Lack of experience: Basically, you don't know what you are looking at and have no way to make heads or tails of what the images represent. The, "spots" you are seeing may be normal structures or not. That's why we radiologists spend years learning how to make sense of those pictures.

Need more info: I'm not sure what you are describing. I'd consult your doctor or the radiologist who read the study.