Book excerpt: Radiology though being restricted to only analyzing images, carries a greater depth to it in encompassing all the forms and fields of medicine from embryology, pathology to treatment and its response. The importance of radiology in the present set-up is very high and no patient work-up is complete without a radiological investigation. Quantitative and qualitative perspectives have always been the two sides of a coin in radiology. Both have been synergistic to each other in not only identifying the lesion, characterizing it but also in guiding effective planning of management, its execution and follow-up. The role of measurements so plays a more integral part at all these levels. Measurements also provide a distinct sense of accuracy and specificity in aiding diagnosis. The experience of taking various measurements in radiology during my postgraduate days made me realize the need for handbook in simple, concise, tabular and diagrammatic format to facilitate the easy and fast reporting of various cases by radiologists. Data contained in this book is compiled from various standard radiology textbooks (refer Bibliography), journals and Internet over the years since my postgraduate days, this will be companion to standard textbooks.