Interesting approach lastgasp- as a matter of interest, was the x-ray ordered by the French or English docs?
The reason I ask, is that it's usually thought that plain x-ray is pretty useless in the management of back pain-the findings of "osteo-arthritis" is as common, (and as useful) as saying an elder has grey hairs.
Glad you're better, just concerned that it took a high dose exposure to get you there.