I do have a small collection of traditional SF ideas which I've never been able to sell. I'm known as a fantasy writer and neither my agent nor my editors want to risk my brand by jumping genre.
Hollywood didn't know if I was an actor or a nut or if I was this crazy character I was playing. I had developed an image of being a little bit unusual, different and wild.
In 1970 I realized that there was negligible risk from x-rays but many radiographs had poor image quality so that the risk from a false negative was significant.

