First of all the experience itself of images that depict body and health is not the case of a mental illness. Other than these images which I am now investigating through skeptical tests, I also experience synesthesia. When I look at numbers or physics equations I experience them in color and shape. Synesthesia is an experience of a sensory experience which is not based in reality, but rather that something you take in from reality is automatically translated into information depicted by a different sense. For instance a real image becomes an unreal feeling. Synesthesia is not defined as a mental illness, rather it is useful and often leads both to enhanced creativity and learning capabilities. I consider my experiences of seeing images that depict body and health to belonging to the same category as synesthesia, and their mere occurrence as such is therefore not a sign of mental illness.
You also have to look at how I behave with my experience. I don't experience my images as part of reality. My sense of reality otherwise is entirely normal and the same as everyone else's, it is just that in addition to that I experience internal images and sensations, and these images which I am investigating belong to the same category of personal as opposed to reality, as the things that you feel when you listen to music or gaze into art. It is something one knows is one's own, personal, and entirely synthetic.
In addition I do nothing immoral with my images. I never tell people of the health images I see of them, unless it is with a skeptic who has agreed to allow an evaluation of the correlation of my images with them. I do not practice psychic readings, I do not even say that I'd be psychic. The most recent person I actually read was none other than Michael Shermer!
I had a depression last year and was seeing a psychiatrist several times, and I even described my images and that I am investigating these, but I was never given any other diagnosis other than depression. However we never went into detail about my images, but the images as well as what I am doing with this has been mentioned and described to a psychiatrist who thought nothing in particular of it. In addition I have also spoken with a psychology professor who specializes in human perception, I described to her the images I have and the investigation I am doing, and her comment was that it was interesting and that it reminded her of synesthesia and she encouraged me to investigate further, not to seek psychiatric help.
Of course I am also interested in the physiological and mental aspect of my experience, I am researching this from all angles. Its origin, not only manifestations, also interest me, and so I intend to discuss this in more detail with psychiatrists or researchers of the brain and mental. However I first want to build a stronger foundation in the investigation before bothering scientists or specialists, but one of my ultimate goals is to one day get to have a brain scan that shows what parts of my brain are activated as I am experiencing my perceptions. A brain scan would in fact show if what I am experiencing is a hallucination (specific areas of the brain would then be activated in a characteristic pattern) or if I am in fact processing visual or felt information or other. That would be interesting.