@ceilingcat - I'm glad to know that x-ray technicians know when to notify the doctor. I'm sure more than few lives are saved that way.
I've had pneumonia before, but luckily I've never experienced pleural effusion. I did have to have a chest x-ray though, and my technician had a very nice bedside manner. I'm sure if my costophrenic angle had been blunted, he wouldn't have given it away to me!