BACKGROUND AND PURPOSE Cerebral embolism has been implicated in the development of cognitive and neurological deficits following bypass surgery. This study proposes methodology for estimating cerebral air embolus volume using transcranial Doppler sonography. METHODS Transcranial Doppler audio signals of air bubbles in the middle cerebral artery obtained from in vivo experiments were subjected...

BACKGROUND The purpose of this prospective study was to determine the clinical usefulness of captopril renal scintigraphy and duplex Doppler sonography in detecting haemodynamically significant renal artery stenosis (> or = 60%) and predicting cure or improvement of hypertension following revascularisation. METHODS Twenty-eight patients with moderate or high index of clinical suspicion of ren...

Hepatic artery thrombosis after liver transplantation is a devastating event requiring emergency retransplantation in most patients. Early clinical signs are often nonspecific. Before duplex sonography (combined real-time and pulsed Doppler) capability was acquired in October 1984, 76% of all transplants in this institution referred for angiography with a clinical suspicion of hepatic artery th...

background: as delay in diagnosis of ectopic pregnancy is directly associated with increasing mortality, it studying the high sensitivity and specificity of transvaginal color doppler sonography as the most preferred imaging method with the most accurate and rapid diagnosis results seems to be necessary. therefore, this study aims to evaluate the diagnostic value of transvaginal color doppler s...

BACKGROUND The detection of hyperechogenicity of the substantia nigra using trans cranial sonography can be predictive of the diagnosis of Parkinson Disease. AIM To report an experience with transcranial sonography for the diagnosis of Parkinson disease. Material ana METHODS One hundred sixteen patients with movement disorders were subjected to a transcranial sonography to detect the presen...

BACKGROUND AND PURPOSE To test a new contrast-specific sonography imaging method that offers visualization of the intracranial vasculature in a manner similar to that seen on angiography. MATERIALS AND METHODS Thirty patients (35 sonography studies total) were included in the study after they provided written informed consent. The patients were scanned through the temporal bone window from bo...