This book provides an overview of X-ray technology and the historic development of modern CT systems. The main focus of the book is a detailed derivation of reconstruction algorithms in 2D and modern 3D cone-beam systems. A thorough analysis of CT artifacts and a discussion of practical issues like dose considerations provide further insight into modern CT systems. The text is highly practical and ready for everyday use, with many detailed illustrations that accompany the technical data. While mainly written for graduate students in biomedical engineering, medical physics, radiology, mathematics, electrical engineering and physics, practitioners in these fields will benefit from this book as well.