文档介绍：DESIGN OF
MEDICAL
ELECTRONIC
DEVICES
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DESIGN OF
MEDICAL
ELECTRONIC
DEVICES
Reinaldo Perez, PhD, PE
President
M. R. Research Inc.
San Diego San Francisco New York
Boston London Sydney Tokyo
This book is printed on acid-free paper.
Copyright © 2002 by Academic Press
All rights reserved.
No part of this publication may be reproduced or transmitted in any form or by any
means, electronic or mechanical, including photocopying, recording, or any
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the publisher. Requests for permission to make copies of any part of the work should
be mailed to the following address: Permissions Department, Harcourt, Inc., 6277 Sea
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ACADEMIC PRESS
An Elsevier Science Imprint
525 B Street, Suite 1900, San Diego, CA 92101-4495, USA
Academic Press
Harcourt Place, 32 Jamestown Road, London, NW1 7BY, UK
Library of Congress Catalog Number: 2001095334
ISBN: 0-12-550711-9
Printed in the United States of America
0**********HP987654321
CONTENTS
ACKNOWLEDGMENTS xi
Introduction 1
1 Proper Design of Power Subsystems in Medical
Electronics 3
ic Interference Requirements 3
Transient Voltage Protection 3
ic Interference 8
ic Interference Requirement 8
Inrush Current Control 12
Soft Start 13
Overvoltage Protection 14
Undervoltage Protection 14
Overload Protection 16
Snubber Circuits 17
Output Filtering 19
Power Failure Warning 21
Flightback Switch Mode Power Supplies 22
Half-Bridge Flyback Converter 24
v
vi CONTENTS
Forward Converter 26
High-Voltage Defibrillators 28
References 30
2 Fundamentals of ic Resonance Imaging 33
Early History of Nuclear ic Resonance 33
General Review of MRI 37
A More Detailed Overview of MRI 40
The Physics of Spin 41
ic Resonance Imaging Hardware D