In the past, radiation treatment planning has been a very lengthy procedure. Now, with the aid of CT therapy-planning computer programs, we can position the therapy beams automatically with precision in a few minutes.

During the development of the whole-body CT scanner, it became clear that the availability of an accurate cross-sectional picture of the body, the CT 'slice,' would have an important effect on the precision and implementation of radiotherapy treatment planning.

Some time ago, I investigated the possibility that a computer might be able to reconstruct a picture from sets of very accurate X-ray measurements taken through the body at a multitude of different angles.

Anybody can be very destructive in that position without at all meaning to be, and I know that I have been inadvertently destructive in the past for certain people on certain occasions.

I mean, I've been stupid in the past, and I've learned from that.

Never look back unless you are planning to go that way