Thank you, Pete. Not sure what you're referring to when you mention the dark bands. On closer inspection (of the posted image) with my glasses off and my face 5 inches from the screen, I see vertical bands that look like some kind of effect from the processing--Rodinal 1:100 "stand"--but these are lighter to me. I keep looking at it Pete but I'm not sure what you mean.
Actually you are right, they are light bands and extend to the top of the frame. How odd. Too many to be from X-ray machines I would have thought. Maybe it has come from the development. But why so many? Or is it the scan?