FUNDAMENTALS OF BODY CT Fourth Edition W. Richard Webb, MD Chief, Thoracic Imaging Professor Emeritus of Radiology and Biomedical Imaging Emeritus Member, Haile Debas Academy of Medical Educators University of California, San Francisco San Francisco, California William E. Brant, MD, FACR Professor Emeritus Department of Radiology and Medical Imaging University of Virginia Health System Charlottesville, Virginia Nancy M. Major, MD Musculoskeletal Radiologist Professor of Radiology Stony Brook University Hospital Stony Brook, New York Mainline Diagnostic Imaging Bryn Mawr, Pennsylvania 1600 John F. Kennedy Blvd. Ste 1800 Philadelphia, PA 19103-2899 FUNDAMENTALS OF BODY CT, Fourth Edition ISBN: 978-0-323-22146-7 Copyright © 2015 by Saunders, an imprint of Elsevier Inc. All rights reserved. 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To the fullest extent of the law, neither the Publisher nor the authors, contributors, or editors, assume any liability for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any methods, products, instructions, or ideas contained in the material herein. Library of Congress Cataloging-in-Publication Data Webb, W. Richard (Wayne Richard), 1945- author. Fundamentals of body CT / W. Richard Webb, William E. Brant, Nancy M. Major. -- Fourth edition. p. ; cm. Includes bibliographical references and index. ISBN 978-0-323-22146-7 (paperback : alk. paper) I. Brant, William E., author. II. Major, Nancy M., author. III. Title. [DNLM: 1. Tomography, X-Ray Computed. WN 206] RC78.7.T6 616.07’572--dc23 2014012926 Content Strategist: Helene Caprari Content Development Specialist: Kelly McGowan Publishing Services Manager: Patricia Tannian Senior Project Manager: Sharon Corell Manager, Art and Design: Steven Stave Printed in China Last digit is the print number: 9 8 7 6 5 4 3 2 1 To Jack and Cole, my grandsons. They understand the value of fundamentals. W.R.W. To my wife and true companion, Barbara. In memory of my daughter Rachel. To our children and their spouses and our ten grandchildren: Evan, Finley, Sophia, Katie, Josie, Danielle, Dylan, Grayson, Amelia, and Noah. W.E.B. To Kenneth…it was meant to be…. N.M.M. P reface Despite the fact that we concentrate on the lung cancer screening, CT pulmonary embolism “ fundamentals” in this book, the fundamentals diagnosis, CT enterography, CT enteroclysis, keep changing along with advances in CT tech- CT colonography, and optimizing CT tech- niques and our improved understanding of vari- niques in musculoskeletal diagnosis. ous diseases. This new edition gives us the chance New topics, discussions of new diseases (too to update important topics and add new material, numerous to mention here), and new images have including a number of new, high-quality images. been added to all chapters, including updated That is what we have attempted to do, without descriptions and illustrations of normal anatomy significantly increasing the size of the book or and incidental findings. Disease classifications, making it less accessible as a teaching tool. including those for pulmonary adenocarcinoma, The half-dozen or so years since the third edi- diffuse lung diseases, and pancreatic lesions, have tion was published have seen continued advances been updated where appropriate. in helical CT techniques. In this edition, we We hope you enjoy and profit from our efforts. review the various spiral/helical CT protocols currently used in clinical practice for the diagno- W. Richard Webb sis of chest, abdominal, and musculoskeletal William E. Brant abnormalities. We have expanded discussions of Nancy M. Major high-resolution CT, lung nodule assessment and vii P f e reface to the irst dition Instead of writing a text intended to record every- intended to provide more than the best CT texts thing that is known about body CT or even on the market do, but rather less, with a different everything that we know about body CT, we have emphasis, and in a more manageable package. attempted to write one that teaches how to per- Each of us has written a different part of this form and read body CT scans. In doing this, we book, obviously depending on our areas of have tried to limit ourselves to discussing what is expertise. Since each of us teaches in a slightly key to understanding body CT from a practical different way, each of the three sections of the clinical standpoint—the key anatomy, the key book—the thorax, the abdomen, and the muscu- concepts, the key diseases, and the key controver- loskeletal system—is somewhat different in sies. We have done this at the risk of leaving a few approach. We hope that by preserving our indi- things out, but it isn’t necessary to read about vidual styles we have made the book more inter- everything when you are first learning a subject. esting to read, and for us, it certainly made this In other words, Fundamentals of Body CT is not book easier to write. ix