BACKGROUND AND PURPOSE After acute stroke, it is often standard practice to obtain magnetic resonance angiography (MRA) to seek evidence of a plausible stroke mechanism. However, hemodynamic patterns after acute ischemic stroke are variable and dynamic. We evaluated information obtained by serial transcranial Doppler ultrasonography (TCD) examinations within the first week after acute ischemic ...

Irregular changes of electric currents called Seismic Electric Signals (SESs) are often observed in Telluric Current Data (TCD). Recently, detection of SESs in TCD has attracted notice for shortterm earthquake prediction. Since most of the TCD collected in Japan is affected by train noise, detecting SESs in TCD itself is an extremely arduous job. The goal of our research is automatic separation...

BACKGROUND AND PURPOSE Nonimaging transcranial Doppler sonography (TCD) and imaging TCD (TCDI) are used for determination of the risk of stroke in children with sickle cell disease (SCD). The purpose was to compare angle-corrected, uncorrected TCDI, and TCD blood flow velocities in children with SCD. MATERIALS AND METHODS A total of 37 children (mean age, 7.8 +/- 3.0 years) without intracrani...

BACKGROUND AND PURPOSE Both transcranial Doppler (TCD) and spiral computed tomography angiography (CTA) are used for noninvasive vascular assessment tools in acute stroke. We aimed to evaluate the diagnostic accuracy of TCD against CTA in patients with acute cerebral ischemia. METHODS Consecutive patients presenting to the Emergency Department with symptoms of acute (<24 hours) cerebral ische...

BACKGROUND AND PURPOSE The objective of this study was to evaluate the yield of emergent transcranial Doppler (TCD) for the evaluation of acute cerebral ischemia. METHODS We performed urgent bedside non-contrast-enhanced TCD in patients with acute cerebral ischemia before or immediately after baseline CT scanning. A fast-track scanning protocol (</=15 minutes) and detailed diagnostic criteria...

BACKGROUND AND PURPOSE The present study aimed at evaluating the prognostic value of transcranial Doppler ultrasonography (TCD) in the acute phase of ischemic stroke, when major therapeutic decisions must be made. METHODS Seventy-three patients with a first-ever ischemic hemispheric stroke underwent neurological assessment according to the Unified Neurological Stroke Scale, clinical subgroupi...

BACKGROUND Contrast transcranial Doppler (c-TCD) has a high sensitivity for detecting right-to-left shunt (RLS), and is probably higher than transthoracic echocardiography (TTE) and comparable with transesophageal echocardiography (TEE). OBJECTIVE To evaluate the accuracy of echocardiography (TTE and TEE) to detect RLS compared to c-TCD. MATERIAL AND METHODS Observational study of patients ...

BACKGROUND This study compares the accuracy of cerebral monitoring systems in detecting cerebral ischemia during carotid endarterectomy. METHODS The authors compared transcranial Doppler sonography (TCD), near-infrared spectroscopy (NIRS), stump pressure (SP) measurement, and somatosensory evoked potentials (SEP) in 48 patients undergoing carotid surgery during regional anesthesia. Cerebral i...

PURPOSE Tumor cell detection (TCD) in bone marrow is an outstanding prognostic factor in breast cancer. There is only one other study that has investigated more than 300 patients with a median follow-up of more than 5 years (J. L. Mansi et al., Lancet, 354:197-202, 1999). We report data from 727 patients with a median follow-up period of 6.5 years. EXPERIMENTAL DESIGN In a prospective study, ...