Transcranial Doppler (TCD) ultrasonography is a technique that uses a hand-held Doppler transducer (placed on the surface of the cranial skin) to measure the velocity and pulsatility of blood flow within the intracranial and the extracranial arteries. Introduced by Rune Aaslid in 1982, it has become indispensable in clinical practice. The main obstacle to ultrasound penetration of the skull is ...

Background: Determination of gestational age is an important step pregnancy management and foetal development evaluation in obstetrics. Any error this estimation results prematurity or post maturity case if the expected date delivery not known, there high chance perinatal mortality near outcome. Hence it achieving uneventful gestation to have a sensitive, specific independent obstetric biometri...

Background and Purpose—The purpose of our study was to investigate whether emergency transcranial Doppler (TCD) findings and their modifications over the first 48 hours are related to early neurological changes in acute ischemic stroke patients. Methods—Ninety-three patients underwent CT scan within 5 hours of a first-ever ischemic hemispheric stroke, and TCD serial examinations at 6, 24, and 4...

Detection of Right-to-Left Shunt With Transcranial Doppler Is Affected by Body-Positioning To the Editor: We read with great interest the recent study by Caputi et al regarding the postural dependency of right-to-left shunt (RLS) detection using contrast-enhanced transcranial Doppler (TCD).1 After using TCD to detect the bubble-load in 2 different body positions (recumbent and standing) in cons...

BACKGROUND AND OBJECTIVE It is necessary to develop an effective and low-cost screening tool for identifying Chinese people at high risk of stroke. Transcranial Doppler ultrasound (TCD) is a powerful predictor of stroke in the pediatric sickle cell disease population, as demonstrated in the STOP trial. Our study was conducted to determine the prediction value of peak systolic velocities as meas...

Takuo HASHIMOTO, M.D.,Toshinori KANKI,M.D.,Satoshi ABE, M.D. Norio NAKAMURA, M.D. Department. of Neurosurgery, The Jikei University School of Medicine (Received 4 September 1989, Accepted 10 January 1990) Abstract Flow patterns of the velocity measured by transcranial Doppler(TCD) were compared with the changes of intracranial pressure(ICP) in patient with subarachnoid hemorrhage and severe hea...

BACKGROUND Transcranial Doppler ultrasound examination (TCD) is a rapid, noninvasive technique used to evaluate cerebral blood flow and is useful for the detection of intracranial hypertension in humans. However, the clinical usefulness of TCD in diagnosing intracranial hypertension has not been demonstrated for intracranial diseases in dogs. OBJECTIVES To determine the association between th...

BACKGROUND AND PURPOSE We have developed PC HYPRFlow, a comprehensive MRA technique that includes a whole-brain CE dynamic series followed by PC velocity-encoding, yielding a time series of high-resolution morphologic angiograms with associated velocity information. In this study, we present velocity data acquired by using the PC component of PC HYPRFlow (PC-VIPR). MATERIALS AND METHODS Ten h...

Patients with non-transfusion-dependent thalassemia (NTDT) are at risk of developing brain ischemia. Transcranial Doppler (TCD) has been established as a useful screening tool of cerebrovascular disease in patients with sickle cell disease. Proteins neuron specific enolase (NSE) and S100B are biomarkers that reflect CNS injury. The purpose of this study is to evaluate cerebral vessel vasculopat...

Background Proper monitoring of cerebral perfusion during carotid artery surgery is crucial for determining if a shunt is needed. We compared the safety and reliability of near-infrared spectroscopy (NIRS) with transcranial Doppler (TCD) for cerebral monitoring. Methods This single-center, retrospective review was conducted on patients who underwent carotid endarterectomy (CEA) using selectiv...