Can dreams be photographed?

Dreams can probably be photographed.

In 1979 a group of researchers tried to photograph dreams. First, they put patients to sleep, causing them to enter the REM phase of sleep, in which you sleep, and your brain continues to work as if you were awake.

The scientists then administered the ester-dimethyl-acetyl cholinomimetic, which is useful for making dreams more vivid. Then, through a stereo electroencephalography that records the electrical activity of the brain, electrical impulses were converted into images.