TY - JOUR T1 - Echoenhancers and Transcranial Color Duplex Sonography JF - Journal of Neurology, Neurosurgery & Psychiatry JO - J Neurol Neurosurg Psychiatry SP - 132 LP - 132 DO - 10.1136/jnnp.67.1.132c VL - 67 IS - 1 AU - PETER MARTIN Y1 - 1999/07/01 UR - http://jnnp.bmj.com/content/67/1/132.4.abstract N2 - Echoenhancers and Transcranial Color Duplex Sonography. Edited by ulrich bogdahn, georg becker, and felix schlachetzki. (Pp 420). Published by Blackwell Science, Oxford 1998. ISBN 0-632-04856-5.Transcranial colour duplex sonography is an ultrasound technique which is becoming increasingly available for the non-invasive imaging of intracranial structures, particularly the basal cerebral arteries. There are now four principal components to the technique: B mode ultrasound which can be used to image the brain parenchyma; colour coded Doppler which provides a colour image of the basal vessels; spectral analysis of pulsed wave Doppler which is used to derive blood flow velocities; and latterly “power” Doppler which is also used for vascular imaging following analysis … ER -