• DIAGNOSIS OF OCCLUSIVE DISEASE OF THE CAROTID AND VERTEBRAL ARTERY SYSTEM, VESSEL WALL PATHOLOGY

    K. Niederkorn
    Deprtment of Neurology, Section of Neurosonology, Medical University Graz – Graz, Austria


    The following topics will be discussed:
    • Diagnosis of stenosis and occlusion in the carotid system.
    • Degree of Stenosis-NASCET and ECST grading systems and clinical implications.
    • Carotid vessel wall pathology- plaque characterization.
    • Vertebral artery pathology- steosisi, occlusion, collaterals.
    • Follow-up ofter carotid and vertebral artery stenting.

  • DIAGNOSIS OF ATHEROSCLEROTIC OCCLUSIVE DISEASE INVOLVING THE INTRACRANIAL ARTERIAL SYSTEM

    E. Bartels
    Center for Neurological Vascular Diagnostics – Munich, Germany


    In this lecture the typical ultrasonographic findings in cerebral occlusive disease will be presented.
    Data concerning the sensitivity and specificity of TCCS in intracranial stenosis remain limited. Furthermore, limited criteria for the quantification of intracranial stenosis by TCCS are available. The classification is based on conventional TCD studies.
    The degree of stenosis is estimated on the basis of the changes of the Doppler spectrum (increased flow velocities in the site of the stenosis, and flow disturbancies upstream and downstream from the lesion). TCCS provides information on the localization of the stenosis. Using the frequency dependent color-coding, the site of the stenosis can be more easily recognized due to the aliasing phenomenon.