BACKGROUND AND PURPOSE We analyzed the temporal and spatial pattern of water diffusion changes during acute subarachnoid hemorrhage (SAH) in rat brain to identify factors contributing to the acute pathophysiology of SAH. METHODS Subarachnoid hemorrhage was remotely induced via perforation of the circle of Willis with an endovascular suture during MR imaging. A fast echo-planar imaging techniq...

INTRODUCTION Submucosal tumors (SMT) are not uncommonly found during upper endoscopy. Management for small SMT originating from muscularis propria (MP) is controversial. Data regarding regular endoscopic ultrasound (EUS) surveillance is scarce. We report our experience in using EUS to monitor these tumors. METHODS Patients with SMT originated from MP as confirmed by EUS were recruited. The ma...

In this work, an analysis of the transmission of ultrasonic signals generated by piezoelectric sensors for air applications is presented. Based on this analysis, an ultrasonic response model is obtained for its application to the recognition of objects and structured environments for navigation by autonomous mobile robots. This model enables the analysis of the ultrasonic response that is gener...

BACKGROUND Left ventricular hypertrophy (LVH) is an important risk factor for cardiovascular events, and its detection usually begins with an electrocardiogram (ECG). OBJECTIVE To evaluate the impact of complete left bundle branch block (CLBBB) in hypertensive patients in the diagnostic performance of LVH by ECG. METHODS A total of 2,240 hypertensive patients were studied. All of them were ...

Hepatic haemangiomas are the most common benign tumours of the liver and commonly present as incidental findings on sonographic examination of the abdomen. Since little is known of the natural course of these tumours, we performed a clinical and sonographic follow up of 123 haemangioma patients. Our prospective study investigated clinical and sonographic findings in 158 haemangiomas for periods...

Since chest X-ray and CT scan features of Kaposi's sarcoma (KS) are nonspecific, we wanted to test the hypothesis that the histological components of this tumour and/or the associated haemorrhagic component, may result in a characteristic signal pattern on magnetic resonance imaging (MRI). Thoracic MRI was performed in a prospective manner in ten patients with acquired immune deficiency syndrom...