Just because it's coming from a doctor doesn't necessarily mean his evaluation will always be correct. Many people may have mood swings, and that can affect other people as well.
A lot of people battling Depression cannot, or will not admit it. If your Doc thinks you may be suffering, please, look into it. It can cause many problems.
A CT scan will not show signs of depression. You may or may not have it, without knowing your symptoms there is no way to guess. Hope you feel better though.
There is always a possibility that the doctor is not always correct. Do not take any medications because they make depression worse. Orgasims relieve depression look it up.
See depression is most dangerous diesease. Because it is make a healthy man to unhealthy. A depressed mind always thinking negative. It reducing our energy.