The most convincing point for my reasoning is the way the image as a negative is deposited in the cloth. When a radiologist examined the negative effect he/she concluded that the energy source for the 'burn' into the cloth came from a point source between the two layers (front and back images simultaneously 'burned into the cloth), leaving an angle of emission path which is consistent across the imagery, front and back. The image pattern was deposited from a point source of energy which radiated outward, front and back, on specific radiation vectors consistent with a
point of origin
Your flat denial is foolishness until you can duplicate the evidence using 12th or 13th century technology.