Thyroid Ultrasonography and Fine Needle Aspiration Biopsy: A Practical Guide and Picture Atlas E-Book
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- Herausgeber: Bentham Science Publishers
- Kategorie: Fachliteratur
- Sprache: Englisch
Thyroid Ultrasonography and Fine Needle Aspiration Biopsy: A Practical Guide and Picture Atlas is a concise and visual reference for diagnostic ultrasonography and needle biopsy of the human thyroid gland. The book provides the reader essential informatio
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Seitenzahl: 155
Veröffentlichungsjahr: 2018
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Thyroid Ultrasonography and
Fine Needle Aspiration Biopsy:
A Practical Guide and Picture
Atlas
Samer El-Kaissi
&
Jack R Wall
BENTHAM SCIENCE PUBLISHERS LTD.
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PREFACE
Disorders of the thyroid and parathyroid glands are common and neck ultrasonography has stood the test of time and established itself as the primary imaging modality of not only the thyroid gland but also of the parathyroid glands and cervical lymph nodes. When clinically indicated, neck ultrasonography is invaluable and can be seen as an extension of the physical examination. It is performed in the office without any patient preparation and allows the physician to carry-out ultrasound-guided biopsies of anterior and lateral neck structures. Physicians who are not personally performing neck ultrasonography and ultrasound guided-procedures still need to be quite familiar with the ultrasound features of the normal and abnormal thyroid gland, parathyroid glands and cervical lymph nodes. This is particularly important as there is a wide variation in the standards of neck ultrasonography reporting.
The authors of this book are Endocrinologists with an interest in thyroid and parathyroid disorders, who have been performing neck ultrasonography and ultrasound-guided procedures of the neck for more than 15 years. When we set out to write this book, our aim was to provide a basic introduction to neck ultrasonography and to allow the reader to quickly search for relevant information about the ultrasound feature or condition in question. To aid with this task, we tried to include as many ultrasound images as possible and to limit the amount of text as we believe in the saying “a picture is worth a thousand words”. This book would be a useful tool for endocrinologists, endocrine surgeons, cytopathologists, ultrasonographers and other health care workers with an interest in thyroid and parathyroid disorders. We would like to thank our family and friends who supported us with the writing of this book and hope that you enjoy it!
Introduction to Thyroid Ultrasound
Samer El-Kaissi,Jack R WallAbstract
Thyroid ultrasound has become an essential tool for the diagnosis of various thyroid disorders. It can be performed in the office during a medical consultation and is used to guide fine needle aspiration biopsies of the thyroid and cervical lymph nodes. Thyroid ultrasound waves are produced by piezoelectric crystals in response to electrical stimulation. These crystals also detect reflected incoming waves and produce a voltage that is used to construct an image. Beginning with A-mode imaging, thyroid ultrasound has evolved into inexpensive machines that produce high resolution two-dimensional B-images. Important properties of thyroid ultrasound waves that affect image quality and resolution include wavelength, propagation velocity, frequency, and acoustic impedance. Posterior shadowing, enhancement, and reverberation are common artefacts of neck ultrasonography and can be useful in defining certain features on ultrasound, such as posterior enhancement of cystic structures and the identification of colloid crystals in thyroid nodules due to reverberation. Colour Doppler and power Doppler help differentiate vascular structures in the neck, where power Doppler is more useful for smaller vessels.
