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The use of ultrasound for various diagnostic techniques in medicine continues to increase in popularity and complexity. It seems possible that the prediction of the National Science Foun dation that ultrasonic techniques may be used as frequently as X-ray techniques by the end of the decade may indeed be fulfilled. The annual scientific meeting of the American Institute of Ultra sound in Medicine is the only meeting held regularly on the North American continent and devoted solely to the diagnostic use of ultrasound. Under these circumstances it is not surprising to find that both the attendance at these meetings and the number of papers submitted for presentation, are increasing markedly each year. The papers presented at these meetings probably reflect the "state-of-the-Art" reasonably accurately. The Proceedings of these annual meetings are therefore a valuable record of the current state of ultrasonic diagnostic techniques in the U.S.A. Even though it is not possible to print in extenso every paper presented at the meeting, an attempt has been made with this volume, by increasing the length of the papers printed in abstract form, to enable the reader to obtain an overall view of current developments and research on this continent in all fields of ultrasonic medical diagnostic technology. Speed of publication is essential if this volume is to contain current information.
E-Book Content
ULTRASOUND IN MEDICINE Volume 2 A Continuation Order Plan is available for this series. A continuation order will bring delivery of each new volume Immediately upon publication. Volumes are billed only upon actual shipment. For further Information please contact the publisher. ULTRASOUND IN MEDICINE Volume 2 Proceedings of the 20th Annual Meeting of the American Institute of Ultrasound in Medicine Edited by Denis White Department of Medicine Queens University Ontario, Canada and Ralph Barnes Bowman Grav School of Medicine Wake Forest University Winston-Salem, North Carolina PLENUM PRESS. NEW YORK AND LONDON Library of Congress Catalog Card Number 74-32484 ISBN-13: 978-1-4613-4309-7 e-ISBN-13: 978-1-4613-4307-3 001: 10.1007/978-1-4613-4307-3 ©1976 American Institute of Ultrasound in Medicine and Plenum Press, New York Softcover reprint of the hardcover 1st edition 1976 A Division of Plenum Publishing Corporation 227 West 17th Street, New York, N.Y. 10011 United Kingdom edition published by Plenum Press, London A Division of Plenum Publishing Company, Ltd. Davis House (4th Floor), 8 Scrubs Lane, Harlesden, London, NW10 6SE, England All rights reserved No part of this book may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, microfilming, recording, or otherwise, without written permission from the Publisher AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE PRESIDENT William M. McKinney, M.D. VICE PRESIDENT Barry B. Goldberg, M.D. SECRETARY Richard L. Popp, M.D. TREASURER Horace E. Thompson, M.D. PRESIDENT ELECT Ross E. Brown, M.D. PAST PRESIDENT Gilbert 8aum, M.D. EXECUTIVE BOARD Ralph Barnes, Ph.D. Ernest N. Carlsen, M.D. Kenneth R. Erikson, Ph.D. Harvey Feigenbaum, M.D. Barbara B. Gosink, M.D. Joseph H. Holmes, M.D. Professor Elizabeth Kelly Fry Padmakar P. Lele, M.D. George R. Leopold, M.D. Richard A. Meyer, M.D. Wesley L. Nyborg, Ph.D. Renate Soulen, M.D. Shirley Staiano, B.S. Robert C. Waag, Ph.D. Michael A. Wainstock, M.D. Fred Winsberg, M.D. Marvin C. Ziskin, M.D. EXECUTIVE SECRETARY Donna LaMaster Preface The use of ultrasound for various diagnostic techniques in medicine continues to increase in popularity and complexity. It seems possible that the prediction of the National Science Foundation that ultrasonic techniques may be used as