![]() Peter Huber, Berne, at the very early introduction of trans cranial Doppler, the inspiring exchange of ideas with Dr. Transcranial Doppler technology is also providing new insights into the pathophysiologic mechanisms of a variety of cerebrovascular conditions. I also gratefully acknowledge the stimulating case discussions with Prof. It was through his pioneering work on the cerebral circulation-using peroperative electromagnetic flowmetry and Doppler techniques-that the basis was laid for the noninvasive trans cranial approach to the circle of Willis described in this book. He1ge Nornes, Oslo, who introduced me to the fascinating study of cerebral hemodynamics in the early 1970's and since then continually encouraged my interest in this field. Since its introduction in 1982, by Rune Aaslid, TCD has evolved as a diagnostic, monitoring, and therapeutic tool. , July 1986 Acknowledgements I am greatly indebted to Prof. Transcranial Doppler (TCD) can be aptly called as the doctor's stethoscope of the brain. Director Institute of Applied Physiology and Medicine Seattle, Wash. It can detect stroke caused by blood clots, narrowed sections of blood vessels, vasospasm due to a subarachnoid hemorrhage, tiny blood clots and more. The diligent application of the potentials of transcranial Doppler ultrasound brings new power to our efforts in understanding the cerebral circulation and the causes, treatment and prevention of cerebrovascular disorders. Transcranial doppler ultrasound (TCD) is a safe, non-invasive way of investigating the circulation in your head. Transcranial doppler (TCD) ultrasound is a painless test that uses sound waves to detect medical problems that affect blood flow in your brain. To the lucky and perceptive person who reads this book, a feeling of excitement and hope for progress is engendered. It brings together, in a clear and incisive fashion, important hemodynamic principles with a simple noninvasive method of application to a part of the cerebral vasculature which has been relatively inaccessible. Every few years a dissertation comes to the area of clinical application of medical technology which carries us forward as on a magic carpet into new regions of understanding and patient care.
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