Clinical Radiology is a journal of the Royal College of Radiologists and is published monthly. Papers are published on all aspects of diagnostic imaging, including original research, editorials, review articles and case reports. Papers on radiological protection, quality assurance, audit in radiology and matters related to radiological training or education are included. Each issue contains correspondence, book reviews and notices of forthcoming events and courses. All papers submitted are subject to peer review and the Editor and Deputy Editors reserve the right to edit papers in preparation for publication in the Journal. Authors are asked to observe the Instructions to Authors published in each issue of the Journal, regarding the style and presentation of their articles. Failure to do so may result in rejection of the papers by the Editorial Board. Papers and all other correspondence should be submitted to the Editor at the Royal College of Radiologists, 38 Portland Place, London W1N 4JQ. Telephone 020 7636 4432