Search results for "Ultra"
showing 10 items of 4451 documents
Ocena stanu szkieletu u dzieci i młodzieży z cukrzycą typu 1 przy użyciu ilościowej metody ultradźwiękowej paliczków dłoni. Badanie pilotażowe
2008
Cel pracy. Ocena stanu szkieletu u dzieci i młodzieży z cukrzycą typu 1 przy użyciu ilościowej metody ultradźwiękowej paliczków dłoni. Materiał i metody. W badaniu wzięło udział 152 pacjentów, 82 chłopców i 70 dziewcząt z cukrzycą typu 1, w wieku – średnio: dziewczęta 13,11±2,93, chłopcy 12,89±3,12. Średni czas trwania choroby wynosił u dziewcząt 4,66±2,43, a u chłopców 4,19±2,36 lata. Średnia wartość hemoglobiny glikowanej HbA1c w dniu badania wynosiła w grupie dziewcząt 7,1±1,3%, a w grupie chłopców 7,2±1,2%. Grupę kontrolną stanowiło 219 zdrowych dzieci (121 chłopców i 98 dziewcząt), dobranych pod względem wieku i płci. Do oceny szkieletu użyto aparatu DBM Sonic 1200, który mierzy zależn…
Association between low-frequency ultrasound and hip fractures - comparison with DXA-based BMD
2014
Background: New methods for diagnosing osteoporosis and evaluating fracture risk are being developed. We aim to study the association between low-frequency (LF) axial transmission ultrasound and hip fracture risk in a population-based sample of older women. Methods: The study population consisted of 490 community-dwelling women (78 – 82 years). Ultrasound velocity (V LF ) at mid-tibia was measured in 2006 using a low-frequency scanning axial transmission device. Bone mineral density (BMD) at proximal femur measured using dual-energy x-ray absorptiometry (DXA) was used as the reference method. The fracture history of the participants was collected from December 1997 until the end of 2010. Li…
Topics in calculus and geometry on metric spaces
2022
In this thesis we present an overview of some important known facts related to topology, geometry and calculus on metric spaces. We discuss the well known problem of the existence of a lipschitz equivalent metric to a given quasiultrametric, revisiting known results and counterexamples and providing some new theorems, in an unified approach. Also, in the general setting of a quasi-metric doubling space, suitable partition of unity lemmas allows us to obtain, in step two Carnot groups, the well known Whitney’s extension theorem for a given real function of class C^m defined on a closed subset of the whole space: this result relies on relevant properties of the symmetrized Taylor’s polynomial…
Development of a methodology for the detection of vertical split head defects in the rail
2011
Strongly Coupled Coherent Phonons in Single-Layer MoS 2
2019
We present a transient absorption setup combining broadband detection over the visible-UV range with high temporal resolution ($\sim$20fs) which is ideally suited to trigger and detect vibrational coherences in different classes of materials. We generate and detect coherent phonons (CPs) in single layer (1L) MoS$_2$, as a representative semiconducting 1L-transition metal dichalcogenide (TMD), where the confined dynamical interaction between excitons and phonons is unexplored. The coherent oscillatory motion of the out-of-plane $A'_{1}$ phonons, triggered by the ultrashort laser pulses, dynamically modulates the excitonic resonances on a timescale of few tens fs. We observe an enhancement by…
Medial Gastrocnemius Muscle Architecture Is Altered After Exhaustive Stretch-Shortening Cycle Exercise
2019
Muscle architecture is an important component of muscle function, and recent studies have shown changes in muscle architecture with fatigue. The stretch-shortening cycle is a natural way to study human locomotion, but little is known about how muscle architecture is affected by this type of exercise. This study investigated potential changes in medial gastrocnemius (MG) muscle architecture after exhaustive stretch-shortening cycle exercise. Male athletes (n = 10) performed maximal voluntary contractions (MVC) and maximal drop jump (DJ) tests before and after an exercise task consisting of 100 maximal DJs followed by successive rebound jumping to 70% of the initial maximal height. The exerci…
Muscle‐tendon morphology and function following long‐term exposure to repeated and strenuous mechanical loading
2020
We mapped structural and functional characteristics of muscle‐tendon units in a population exposed to very long‐term routine overloading. Twenty‐eight military academy cadets (age: 21.00 ± 1.1 yrs; height: 176.1 ± 4.8 cm; mass: 73.8 ± 7.0 kg) exposed for over 24 months to repetitive overloading were profiled via ultrasonography with a senior subgroup of them (n = 11; age = 21.4 ± 1.0 yrs; height = 176.5 ± 4.8 cm; mass = 71.4 ± 6.6 kg) also tested while walking and marching on a treadmill. A group of eleven ethnicity‐ and aged‐matched civilians (age = 21.6 ± 0.7 yrs; height = 176.8 ± 4.3 cm; mass = 74.6 ± 5.6 kg) was also profiled and tested. Cadets and civilians exhibited similar morphology…
Achilles tendon viscoelastic properties and mechanical responses to a single bout of exercise
2014
Contributions of biomechanical modeling and machine learning to the automatic registration of Multiparametric Magnetic Resonance and Transrectal Echo…
2022
El cáncer de próstata (CaP) es el primer cáncer por incidencia en hombres en países occidentales, y el tercero en mortalidad. Tras detectar en sangre una elevación del Antígeno Prostático Específico (PSA) o tras tacto rectal sospechoso se realiza una Resonancia Magnética (RM) de la próstata, que los radiólogos analizan para localizar las regiones sospechosas. A continuación, estas se biopsian, es decir, se toman muestras vivas que posteriormente serán analizadas histopatológicamente para confirmar la presencia de cáncer y establecer su grado de agresividad. Durante la biopsia se emplea típicamente Ultrasonidos (US) para el guiado y la localización de las lesiones. Sin embargo, estas no son …
Vairogdziedzera un vēdera dobuma orgānu ultrasonoskopijas datu apkopojums reimatisko slimību pacientiem, kas lieto bioloģiskos slimību modificējošos …
2019
Mūsdienās reimatisko slimību ārstēšanā aizvien biežāk tiek pielietoti bioloģiskie slimību modificējošie medikamenti. Bažas par jau tā paaugstināto onkoloģisko slimību risku reimatisko slimību pacientiem liek aizdomāties par to, vai bioloģiskiem medikamentiem ir ietekme uz šo risku un vai terapija ietekmē izmaiņas vairogdziedzerī un vēdera dobuma orgānos, ko var izvērtēt ar ultrasonoskopijas metodi. Darba mērķis: Apkopot un izvērtēt ultrasonoskopijas datus vairogdziedzerim un vēdera dobuma orgāniem pacientiem, kas saņem bioloģiskos slimību modificējošos anti– reimatiskos līdzekļus Paula Stradiņa Klīniskajā universitātes slimnīcā, lai konstatētu biežāk sastopamās izmaiņas un noteiktu to nozīm…