Spectral Domain OCT: A Practical Guide Shaun Dacosta, Babu Rajendran, P Janakiraman
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1Spectral Domain Optical Coherence Tomography: A Practical Guide2
3Spectral Domain Optical Coherence Tomography: A Practical Guide
Second Edition
Shaun Dacosta MS Assistant Director - Research The Eye Research Foundation Vijaya Hospital, 180 Arcot Road Chennai, Tamil Nadu, India shaundacosta@yahoo.com Babu Rajendran MS FACS Medical Director and Vice President The Eye Research Foundation Vijaya Hospital, 180 Arcot Road Chennai, Tamil Nadu, India drbabu@eth.net P Janakiraman MS DOMS Joint Medical Director The Eye Research Foundation Vijaya Hospital, 180 Arcot Road Chennai, Tamil Nadu, India janakiraman@vsnl.in
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Spectral Domain Optical Coherence Tomography: A Practical Guide
© 2011, Jaypee Brothers Medical Publishers
All rights reserved. No part of this publication should be reproduced, stored in a retrieval system, or transmitted in any form or by any means: electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the authors and the publisher.
This book has been published in good faith that the material provided by the authors is original. Every effort is made to ensure accuracy of material, but the publisher, printer and authors will not be held responsible for any inadvertent error(s). In case of any dispute, all legal matters to be settled under Delhi jurisdiction only.
First Edition: 2008
Second Edition: 2011
9789350253878
Typeset at JPBMP typesetting unit
Printed in India
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7PREFACE TO THE SECOND EDITION
—Sir William Bragg
Australian Physicist
1915 Nobel Prize in Physics
The Spectral Domain OCT gave us so much new facts about retinal disease that we wonder how we ever practiced as Vitreoretinal Consultants all these years. The last two years have been indeed an eye opener for us in this field. Apart from admiring the several new facts and enjoying trying to correlate them to and with associated investigations and the disease process it certainly has made us discover new ways of thinking about them as well.
We did not realize that TWO years had indeed flown by with the Topcon 1000 machine and since our First Edition came out until the Topcon 2000 along with its upgraded software landed on our doorstep. With its improved and enhanced speed of 27,000 A scans/sec, improved software algorithms and additional facilities for anterior segment imaging, we thought it was time and justified to write this second edition.
We have attempted to highlight all these features and added newer chapters in keeping with the newer features. Images from the previous edition have been updated with the latest pictures with the series 2000.
We are greatly appreciative of the continued support and guidance we have received from the Singapore office of Topcon as well as the Service Engineers and Support Staff of M/s Mehra Eye Tech, the local distributors of the equipment in India.
We are sure you will enjoy this book as much as we have enjoyed putting this edition together. Not only did we enjoy ourselves, but we have learnt a great deal in the process.
Shaun Dacosta
Babu Rajendran
P Janakiraman
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9PREFACE TO THE FIRST EDITION
Technology feeds on itself. Technology makes more technology possible.
Just as we were getting used to Optical Coherence Tomography, and began raving about its wonderful potential and its many uses, comes an enhanced and more precise technology called Spectral Domain OCT. It enhances the wide potential of 2D-OCT and is more precise with less interpolation in the interpretation of results.
Several companies manufacture different types of machines using the principle of Spectral Domain OCT. The TOPCON 3D-OCT-1000 is inbuilt with a nonmydriatic fundus camera and therefore has the unique ability of capturing the color picture and the OCT in one sitting and rather quickly making it comfortable for both patient and doctor.
While several books are available on OCT and its interpretation, this is possibly one of the early ones to be a practical guide to the beginner to this new and exciting technology.
We have attempted to outline a step-by-step approach to image capturing, analysis and interpretation with a large collection of selected cases.
We hope this book will generate the excitement in the reader enough to want to delve into this new 3D domain as much as it did in all of us when we were first exposed to it.
Before long this technology will be enhanced with the addition of Adaptive Optics to the OCT technology. This will enable cellular level resolution rather than the present-day tissue level pictures. Till that time enjoy the present and the book.
Shaun Dacosta
Babu Rajendran
P Janakiraman
—Ralph Waldo Emerson