First published in 1939, Clark's Positioning in Radiography is the preeminent text on positioning technique for diagnostic radiographers. Whilst retaining the clear and easy-to-follow structure of the previous edition, the thirteenth edition includes a number of changes and innovations in radiographic technique. The text has been extensively updated, including a new section on evaluating images, The 10-point plan, which is linked throughout to a listing of Essential image characteristics for each procedure. The section on digital imaging has been expanded not only to elaborate more extensively on the technology but to demonstrate its various clinical applications. New sections also include imaging informatics and its role in the modern world of medical imaging, holistic approaches to patient care and discussion of the important aspect of the patient journey. Students will also benefit from more detailed reference to positioning errors and how to avoid mistakes, as well as a greater emphasis on standard radiation protection measures and guidance on the most recent radiation dose reference levels for specific examinations. Clark's Positioning in Radiography continues to be the definitive work on radiographic technique for all students on radiography courses, radiographers in practice and trainee radiologists.