Book excerpt: This companion to Clark's Positioning in Radiography focuses on special imaging procedures and the different modalities and contrast media studies which are used in the modern imaging department. Bringing together all specialized procedures into one volume, it is the essential source of information for all radiography staff when faced with specialized investigations. The book adopts a systematic approach and is designed to be a clear and comprehensive reference text. Each chapter is highly illustrated and contains sections detailing anatomy and physiology, including common variants, and an overview of recommended imaging procedures. Both conventional and cross-sectional procedures are described, giving details for each procedure on indications/contraindications, position of patient, imaging modality, imaging procedure, contrast media and injection data, and image analysis. Important information is provided on the parameters which affect image production and quality for each of the modalities described in the book. It is ideal for use by radiographers in the clinical environment and also as a teaching/studying resource at both undergraduate and postgraduate level.