The seventh edition of this now standard work is most welcome. Over 100 pages of text and 600 new illustrations have been added. The new illustrations are done in the same superb fashion that characterized those of the previous editions. This book has long had no peer in the field of reference books on positioning. The revisions and added material keep it abreast of the advancements in the field of radiography. The new section on radiation exposure in diagnostic procedures is particularly timely and should prove useful. This book should be made available to everyone making diagnostic radiographs.