View clinical trials related to Elasticity Imaging Techniques.
Filter by:The goal of this clinical trial is to test the performance of neuronal networks trained on ultrasonic raw Data (=radiofrequency data) for the assessment of liver diseases in patients undergoing a clinical ultrasound examination. The general feasibility is currently evaluated in a retrospective cohort. The main questions the study aims to answer are: - Can a neuronal network trained on RF Data perform equally good as elastography in the assessment of diffuse liver diseases? - Can a neuronal network trained on RF Data perform better than a neuronal network trained on b-mode images in the assessment of diffuse liver diseases? - Can a neuronal network trained on RF Data distinguish focal pathologies in the liver from healthy tissue? To answer these questions participants with a clinically indicated fibroscan will undergo: - a clinical elastography in Case ob suspected diffuse liver disease - a reliable ground truth (if normal ultrasound is not sufficient e.g. contrast enhanced ultrasound, biopsy, MRI or CT) in case of focal liver diseases, depending on the standard routine of the participating center - a clinical ultrasound examination during which b-mode images and the corresponding RF-Data sets are captured
In daily life,people protect their tissues against ischemia by constantly changing positions. In situations that cause unconsciousness such as anesthesia,people cannot react to the stress or pressure due to immobility.This prolongation of immobility can lead to reversible or irreversible damage to the tissues.Therefore,not careful positioning in patients undergoing surgery can lead to serious complications.Peripheral nerve disorders are common in clinical practice.Electrodiagnostic studies continue to be the gold standard for the evaluation of nerve disorders.Elastography is a technique that measures the elastic properties of tissues as a new ultrasonography technology.Given the histological changes in diseased peripheral nerves, nerve elastography has begun to be studied as a noninvasive way to evaluate changes in nerve tissue composition.Elastography of the peripheral nerves has rarely been studied. Primary aim in this study is to compare the elastography values of the brachial plexus in different arm and head positions and to contribute to elucidating the mechanism of nerve damage due to position.American Society of Anesthesiologists (ASA) I-II volunteers between the ages of 18-65 will be recruited to the study.The bilateral brachial plexus of each volunteer will be examined.Participants with upper extremity or cervical trauma, muscle weakness,cervical disc herniation or a history of spine or cranial surgery, neuromuscular disease, clinical diagnosis of brachial plexopathies, hyperlipidemia,diabetes mellitus or radiotherapy history in the cervical region,body mass index> 35 will not be taken.Before the procedure, the muscle strength of the upper extremity and cervical muscles will be examined and volunteers with muscle weakness will be excluded from the study.Measurements will be made together by two researchers who have at least 5 years of experience in ultrasonography.Measurements will be made in 3 different positions.When the arm and head are in neutral position, the head is turned to the opposite side and the head is turned to the opposite side, the brachial plexus in the supraclavicular region will be visualized by ultrasonography while the arm is in hyperabduction.The area between the upper boundary and the lower boundary of the plexus will be marked, and the values will be taken 5 times consecutively with the share wave elastography method and the elastic modulus,shear wave velocity will be recorded.