First published in 1939, Clark's Positioning in Radiography is the pre-eminent 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 Ten Point Plan", which is linked throughout to "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. 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. This new edition includes more anatomical drawings to support better understanding of radiographic anatomy, and brand-new positioning photographs reflecting the different approaches in technique using the variety of imaging platforms available in radiography departments. Clark's Positioning in Radiography will continue to be the definitive work on radiographic technique for all students on diagnostic radiography courses, radiographers in practice and trainee radiologists preparing for the FRCR or equivalent qualifying examinations.