View clinical trials related to Ultrasonography.
Filter by:Retrospective comparison of complex cystic renal lesions which are found with computed tomography (CT) and were controlled with contrast enhanced ultrasound (CEUS).
The objective of this study is to prospectively compare laparoscopic ultrasound to transabdominal ultrasound for the detection of gallbladder pathology in obese patients presenting for laparoscopic gastric bypass. We hypothesize that laparoscopic ultrasound will be more sensitive and specific for cholelithiasis than transabdominal ultrasound in morbidly obese patients.
The purpose of this study is to compare Zoladex plus tamoxifen with tamoxifen alone as adjuvant hormonal therapy in pre- or perimenopausal women with early-stage breast cancer in terms of breast density, estrogen levels, lipidemia, endometrial thickness and ultrasonographic abnormalities.
An Emergency Department Targeted Ultrasound (EDTU) is an ultrasound examination performed by an emergency department physician, instead of a radiologist or ultrasound technician. EDTU is intended to be a readily assessable test performed at the bedside, to quickly and safely determine the presence of a disease state; it answers a binary question, as compared to formal ultrasound imaging which seeks to determine the cause of a patient's symptoms. The objective of this study is to determine the accuracy of EDTU in patients suspected of renal colic. By demonstrating excellent test characteristics, these investigators hope that this research will be used to incorporate EDTU for hydronephrosis into standard emergency care in Canada.
Inadvertent puncture of an unintended object in a vascular access procedure is common and can lead to serious consequences. Inadvertent common carotid artery (CCA) puncture while targeting the internal jugular vein (IJV), for example, is reported to have an incidence of 2% - 8% and usually results in localized hematoma formation. The hematoma may enlarge rapidly if the patient is coagulopathic, or if a large puncture wound is produced by the introduction of the sheath itself into the CCA. Airway obstruction, pseudoaneurysm, arterio-venous fistula formation and retrograde aortic dissection have all been reported as a consequence of CCA puncture. In the presence of occlusive (atheromatous) carotid disease, inadvertent puncture may carry the risk of precipitating a cerebrovascular accident. In this study, we aim to collect color Doppler and B-mode ultrasound videos from the most common ultrasound-guided vascular access sites - internal jugular vein, subclavian vein, femoral vein, basilic vein, and brachial vein. The videos will also include structures in close proximity to the intended veins. Using such database, we will run various vessel tracking and identification algorithms to evaluate their performance. Our ultimate goal is to develop an algorithm that will aid the ultrasound operator in identifying structures and differentiating between arteries and veins.