Free online textbooks
Radiation Oncology Physics Handbook
E.B. Podgorsak [download here]
"The intent of the text is to serve as a factual supplement to the various textbooks on medical physics and to provide basic radiation oncology physics knowledge in the form of a syllabus covering all modern aspects of radiationoncology physics." (from the authors' preface)
This book has been made freely available by the International Atomic Energy Authority.
Principles of Computerized Tomographic Imaging
Avinash C. Kak and Malcolm Slaney [download here]
"The purpose of this book is to provide a tutorial overview on the subject of computerized tomographic imaging. We expect the book to be useful for practicing engineers and scientists for gaining an understanding of what can and cannot be done with tomographic imaging." (from the authors' preface)
This book is now out of print, so IEEE
has transferred the copyright back to the authors, who have decided to
scan the book into Adobe Acrobat PDF format and place it online. Each chapter
is available as a separate PDF file. While some of the chapters are quite
large, the download times should be acceptable.
Principles of Data Analysis
Prasenjit Saha [download here]
As the title says, its topic is the principles of data analysis. The emphasis is on why things are done rather than on exactly how to do them. If you already know something about the subject, then working through this book will probably deepen your understanding. The book begins by identifying four general classes of data analysis problem, and uses elementary probability along with Bayes' theorem to explain exactly what each involves. The next two chapters use some simple distributions to illustrate these ideas. Further chapters discuss the Monte Carlo method (briefly), least-squares fitting (in some detail), and the problem of determining a distribution function from data. The book ends with an interesting pair of chapters on entropy: one on the maximum entropy method, and one actually about thermodynamics.
The paperback version is available from the usual online sources but text itself may be downloaded free.
The Basics of MRI
Joseph P. Hornak [download here]
This is a multimedia educational package which provides a guide to the basic principles of magnetic resonance imaging (MRI).
This package requires a frames-compatible browser. Accessing the package is free, although a site license for this software package may be purchased for use on your own computer. This will eliminate network download delays associated with accessing the software.