Search results for "ultraääni"
showing 10 items of 51 documents
Visuaalisen palautteen vaikutus fysioterapiaopiskelijoiden palpaatiotaitojen tarkkuuteen lonkan alueen lihaksistossa : satunnaistettu kontrolloitu tu…
2012
Nopeasta teknologisesta kehityksestä huolimatta manuaalisen tutkimisen taidot ovat edelleen tärkeä ydinosaamisalue fysioterapiassa. Manuaalisessa tutkimisessa eniten käytetty tekniikka on palpaatio, joka käsin toteutettavana tutkimisen tekniikkana tukee hoitopäätöksen tekemistä ja ohjaa näin hoidon tuloksellisuutta. Palpaatio on toimenpiteenä nopea ja halpa, mutta sen haasteena ovat subjektiivisuus ja objektiivisen standardin puute. Palpaation tarkkuudessa ja toistettavuudessa onkin havaittu puutteita. Palpaatiotaitoa on perinteisesti opetettu anatomisiin piirroksiin, kuviin ja anatomisiin luu- ja lihasmalleihin sekä kinesteettisen aistin antamaan palautteeseen nojaten. Tutkimustieto on kui…
Specific distribution of cross-sectional area in each hamstring muscle of sprint runners and relationship between those and sprint performance
2018
Esijännitystason vaikutus lihassolun pituuteen eksentrisessä lihastyössä
2001
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…
Achilles tendon viscoelastic properties and mechanical responses to a single bout of exercise
2014
Development of microfluidics for sorting of carbon nanotubes
2018
Sorting of carbon nanotubes by their chirality is the current bottleneck in the way to their broad employment based on their exceptional electronic and optical properties. Despite the extensive effort, there is no known method, which would result in really pure chirality ensembles. Previously reported sorting protocols result in enrichment rather than in sorting, alter electronic structure, and suffer from low yield. This is mostly due to the statistical approach, where the nanotubes with mixed chiralities are treated as a set. In this thesis, we propose a new sorting technique based on nanotube-by-nanotube compartmelization, characterization, and sorting in a continuously running droplet-b…
Vastus lateralis -lihaksen tilavuuden, fysiologisen poikkipinta-alan ja spesifisen voiman määrittäminen käyttäen ultraääntä ja magneettikuvausta
2005
DL_Track : Automated analysis of muscle architecture from B-mode ultrasonography images using deep learning
2023
B-mode ultrasound is commonly used to image musculoskeletal tissues, but one major bottleneck is data analysis. Manual analysis is commonly deployed for assessment of muscle thickness, pennation angle and fascicle length in muscle ultrasonography images. However, manual analysis is somewhat subjective, laborious and requires thorough experience. We provide an openly available algorithm (DL_Track) to automatically analyze muscle architectural parameters in ultrasonography images or videos of human lower limb muscles.
 We trained two different neural networks (classic U-net [Ronneberger et al., 2021] and U-net with VGG16 [Simonyan & Zisserman, 2015] pretrained encoder) one to detect …
Synthesis of nanostructured protein–mineral-microcapsules by sonication
2022
We propose a simple and eco-friendly method for the formation of composite protein–mineral-microcapsules induced by ultrasound treatment. Protein- and nanoparticle-stabilized oil-in-water (O/W) emulsions loaded with different oils are prepared using high-intensity ultrasound. The formation of thin composite mineral proteinaceous shells is realized with various types of nanoparticles, which are pre-modified with Bovine Serum Albumin (BSA) and subsequently characterized by EDX, TGA, zeta potential measurements and Raman spectroscopy. Cryo-SEM and EDX mapping visualizations show the homogeneous distribution of the densely packed nanoparticles in the capsule shell. In contrast to the results re…
Tendon length estimates are influenced by tracking location
2022
Abstract Purpose Measurement of medial gastrocnemius (MG) tendon length using ultrasonography (US) requires the muscle–tendon junction (MTJ) to be located. Previously, the MG MTJ has been tracked from different proximo-distal locations near the MTJ, which could influence estimates of tendon length change due to the different characteristics of the aponeurosis and tendon. We used US to evaluate the effect of tracking point location on MG MTJ displacement during maximal and submaximal (10, 20 and 30% of the non-injured maximal) isometric plantar flexion contractions. Methods Displacement behaviour of MTJ was tracked from (1) the exact MTJ; and (2) from an insertion point of a muscle fascicle …