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The way he did it was by embedding a special dynamic photo of living organs on a subdermal layer. So from any angle, when hit by X-rays they are prompted to block the rays and return a perfect image of a healthy humans insides.
That won't work, you could block xrays so that they can't see inside of him but an xray image is recorded by how many xrays are reflected. A picture won't do anything, it is more like a measure of density inside of an object.
For example, you go with this picture idea and someone takes an x-ray scan. The picture could show up how you envision it, bone and whatnot looking like a human, but it would also show a picture of his internal structure along with the picture of a human's insides.
If your picture reflected all the x-rays so that they didn't go inside of your bot then you would have a large white area on the x-ray picture.
Your best bet is to have your bot's internal systems look like a human's.