Search results for "Ultra"
showing 10 items of 4451 documents
Comparisons of two diaphragm ultrasound-teaching programs: a multicenter randomized controlled educational study
2019
Abstract Background This study aims to ascertain whether (1) an educational program is sufficient to achieve adequate Diaphragm Ultrasound (DUS) assessments on healthy volunteers and (2) combining a video tutorial with a practical session is more effective in making learners capable to obtain accurate DUS measurements, as opposed to sole video tutorial. Results We enrolledstep 1: 172 volunteers naïve to ultrasound. After watching a video tutorial, a questionnaire was administered and considered to be passed when at least 70% of the questions were correctly answered. Course participants who passed the theoretical test were randomized to either intervention or control group. Learners randomiz…
CT and MR imaging of cystic renal lesions
2020
AbstractCystic renal lesions are a common incidental finding on routinely imaging examinations. Although a benign simple cyst is usually easy to recognize, the same is not true for complex and multifocal cystic renal lesions, whose differential diagnosis includes both neoplastic and non-neoplastic conditions. In this review, we will show a series of cases in order to provide tips to identify benign cysts and differentiate them from malignant ones.
Assessment of nonnegative matrix factorization algorithms for electroencephalography spectral analysis.
2020
AbstractBackgroundNonnegative matrix factorization (NMF) has been successfully used for electroencephalography (EEG) spectral analysis. Since NMF was proposed in the 1990s, many adaptive algorithms have been developed. However, the performance of their use in EEG data analysis has not been fully compared. Here, we provide a comparison of four NMF algorithms in terms of accuracy of estimation, stability (repeatability of the results) and time complexity of algorithms with simulated data. In the practical application of NMF algorithms, stability plays an important role, which was an emphasis in the comparison. A Hierarchical clustering algorithm was implemented to evaluate the stability of NM…
The Value of Median Nerve Sonography as a Predictor for Short- and Long-Term Clinical Outcomes in Patients with Carpal Tunnel Syndrome: A Prospective…
2016
Objectives To investigate the prognostic value of B-mode and Power Doppler (PD) ultrasound of the median nerve for the short- and long-term clinical outcomes of patients with carpal tunnel syndrome (CTS). Methods Prospective study of 135 patients with suspected CTS seen 3 times: at baseline, then at short-term (3 months) and long-term (15–36 months) follow-up. At baseline, the cross-sectional area (CSA) of the median nerve was measured with ultrasound at 4 levels on the forearm and wrist. PD signals were graded semi-quantitatively (0–3). Clinical outcomes were evaluated at each visit with the Boston Questionnaire (BQ) and the DASH Questionnaire, as well as visual analogue scales for the pat…
Corundum Anorthosites-Kyshtymites from the South Urals, Russia: A Combined Mineralogical, Geochemical, and U-Pb Zircon Geochronological Study
2019
Kyshtymites are the unique corundum-blue sapphire-bearing variety of anorthosites of debatable geological origin found in the Ilmenogorsky-Vishnevogorsky complex (IVC) in the South Urals, Russia. Their mineral association includes corundum-sapphire, plagioclase (An61&ndash
Serratia marcescens infection or hypoxic-ischaemic encephalopathy in neonates: Is magnetic resonance imaging a problem-solving tool?
2017
To the Editor: We read with great interest the retrospective case series by A Madide and J Smith,[1] describing brain ultrasound (US) findings of neonates with Serratia marcescens hospital-acquired infections. S. marcescens is a Gram-negative organism that frequently colonises neonatal intensive care units (NICUs). This bacterium can cause severe brain infections in neonates, with irreversible neurological damage and long-term neurodevelopmental impairment. The authors conclude that in babies with acute onset of the illness, US scans allow doctors to highlight pathological changes in the brain immediately before the microbiological diagnosis of infection, and to follow the evolution of thos…
Muscle hypertrophy and serum hormone concentrations during combined strength and endurance training vs. strength or endurance training only in middle…
2008
Jensen, Benjamin 2008. Muscle hypertrophy and serum hormone concentrations during combined strength and endurance training vs. strength or endurance training only in middle aged and older women. University of Jyväskylä, Department of Biology of Physical Activity. Master’s thesis in Science of Sport Coaching and Fitness Testing. 70 pp. Purpose: The purpose of this investigation was to compare the effects of strength training only (2 x week), endurance training only (2 x week), and combined training (2 + 2 x week) on muscle hypertrophy and serum hormone concentrations in middle-aged and older women during 21 weeks of training. Methods: 96 healthy, moderately active middle-aged and older women…
21 viikon voimaharjoittelun vaikutukset voimantuottokykyyn sekä ulomman reisilihaksen pennaatiokulmaan ja lihaspaksuuteen
2008
Janne Kulmala 2008. 21 viikon voimaharjoittelun vaikutukset voimantuottokykyyn sekä ulomman reisilihaksen pennaatiokulmaan ja lihaspaksuuteen. Valmennus- ja testausoppi. Kandidaatin tutkielmaseminaari. Jyväskylän yliopisto, liikuntabiologian laitos. s. 37 Raskas voimaharjoittelu on yksi maailman suosituimmista kuntoilumuodoista. Se johtaa moniin rakenteellisiin sekä hermostollisiin mukautumisiin, joiden johdosta voimantuottokyky kasvaa. Tässä tutkimuksessa pyrittiin aiheuttamaan erityisesti lihaksen rakenteellisia muutoksia lihaskasvuun tähtäävällä hypertrofisella puolen vuoden harjoittelulla. Pennaatiolihaksessa lihassyyt ovat sijoittuneet vinosti lihaksen pitkittäiseen akseliin nähden muo…
Iän vaikutus lihasarkkitehtuuriin 16-85-vuotiailla pikajuoksijoilla
2003
Tämän tutkimuksen tarkoituksena oli selvittää ikääntymisen vaikutusta vastuslateraliksen (VL), gastrocnemius medialiksen (GM) ja gastrocnemius lateraliksen (GL)paksuuteen, lihassyykimppujen pennaatiokulmaan sekä pituuteen. Koehenkilöinä oli 9316-85-vuotiasta miespikajuoksijaa, jotka harrastivat kilpailumielessä pikajuoksuaveteraanisarjoissa. Pennaatiokulmat ja lihaspaksuudet mitattiin yhdestä kohdastalihaksen päältä reaaliaikaisella B-mallin ultraäänilaitteella ja lihassyykimpun pituusarvioitiin pennaatiokulman ja lihaspaksuuden avulla.Korrelaatioanalyysi osoitti sekä absoluuttisen että raajan pituuteen suhteutetun lihaksenpaksuuden vähenevän merkitsevästi kaildssa mitatuissa lihaksissa iän…