I had to buy this book for a class. I was very disappointed. This edition has several typos and mistakes on the tables. The examples and problems sections are really irritating, sometimes they show a couple of equations and write 5 problems over the same equation over and over again, and I have found instances where the "answers to selected problems" section show incorrect information. There is very little physics that you can learn from those problems.It seems that it is hard to find good books on Medical Imaging, but I highly recommend "The essential physics of medical imaging" (Bushberg. et al.) This is a very good review of the imaging techniques but it is not very quantitative. A more quantitative book I would recommend is "Medical Imaging: signals and systems" by Jerry L. Price.If you have an option, don't waste your money on this book.