Radiology is a branch of medicine that employs the use of imaging to to diagnose and treat diseases seen within the body. A variety of imaging techniques such as X-ray radiography, ultrasound, computed tomography (CT), nuclear medicine including positron emission tomography (PET), and magnetic resonance imaging (MRI) are used to diagnose and/or treat diseases. Interventional radiology is the performance of (usually minimally invasive) medical procedures with the guidance of imaging technologies. Radiology can be categorized for different organs or regions of body like chest radiology, cardiovascular radiology, fetal radiology, GI radiology, Nuclear medicine, pediatrics radiology etc. Radiology is also known as Roentgenology after William Conrad Rontgen who discovered X- rays. Roentgenology: Radiology, the science of radiation and, specifically, the use of both ionizing (like X-ray) and nonionizing (like ultrasound) modalities for the diagnosis and treatment of disease............. This book has been written for the Medical/Pharmacy/Nursing/ME/M.TECH/BE/B.Tech students of All University with latest syllabus for ECE, EEE, CSE, IT, Mechanical, Bio Medical, Bio Tech, BCA, MCA and All B.Sc Department Students. The basic aim of this book is to provide a basic & best knowledge in Radiology. Radiology Syllabus students of degree, diploma & AMIE courses and a useful reference for these preparing for competitive examinations. All the concepts are explained in a simple, clear and complete manner to achieve progressive learning. This book is divided into five chapters. Each chapter is well supported with the necessary illustration practical examples.