They have given their consent for a medical procedure.

Yes, and that is when you are asked if you want anyone else in the room with you. You can also change that at any time up until before you go in. Doctors do not let just anyone in without explicit consent.

I’m caring more about the fact that these photoes are fucking grim and even if the consent is there, it’s weird someone would want them.

That’s your opinion. Myself, and many others, do not think so.