A billboard near my home touts the benefits of chiropractic therapy, with this very picture. I am not terribly impressed. The x-ray that was artfully superimposed upon the model’s photograph is an IVP, a kidney study. Notice the bright areas to either side of midline: these represent dye within the renal collecting systems. Apparently, chiropracters think that kidneys are located somewhere near the armpits, well above the heart. Could that be why they stand at arm’s length when they squeeze your upper back?