Granted it was 40 years ago before digital scans.

I was getting worse and worse. They brought a thoracic surgeon specialist in who had them do X-rays from all kinds of funny angles. Sure enough pneumonia. The lung was completely full of liquid so there wasn’t a shadow

They brought a 2 liter bottle and hug needle and stuck it in between my ribs in my back to drain it. Don’t cough they said or it will collapse. That hurt like hell