
Overview
Background
Juha Töyräs holds a position of Professorial Research Fellow in the School of Information Technology and Electrical Engineering, The University of Queensland. He is also is the Head of Research and Innovation, Kuopio University Hospital and Wellbeing Services County of North Savo, and Professor of Medical Physics and Engineering, University of Eastern Finland. He has a PhD degree in the field of medical physics and his research is focused on medical devices and sensors, medical imaging, medical signal processing and connective tissue biomechanics. Since 2004, he has been the Vice/Co-Head of the Biophysics of Bone and Cartilage research group and Co-Head of the Sleep Technology and Analytics group since it was founded in January 2017 at the Department of Applied Physics, University of Eastern Finland. The groups are relatively large (three professors, c.20 research fellows and postdocs and >60 PhD students) and productive (>750 full papers and >80 PhD theses during the last 20 years). Professor Töyräs holds research grants from various European and Australian sources. He has published 323 peer-reviewed full scientific papers and numerous abstracts in international scientific meetings. In addition, he has completed supervision of 52 PhD students and number of MSc students. His papers have been cited over 14000 times and his Hirsch-index is 63 (Google Scholar). Currently, Professor Toyras supervises (University of Eastern Finland, The University of Queensland) c.20 PhD-students and number of research fellows in various fields of biomedical engineering. In addition to scientific publications and supervised academic theses, his work has led to patents and commercialization of scientific innovations. One example of this line of research is the development of a forehead EEG-electrode set for emergency medicine. The Bittium BrainStatus EEG-electrode set is patented, CE-approved and currently in global market (https://www.bittium.com/products_services/medical/bittium_brainstatus).
Availability
- Professor Juha Toyras is:
- Available for supervision
Qualifications
- Masters (Coursework) of Science, University of Kuopio
- Doctor of Philosophy, University of Kuopio
Works
Search Professor Juha Toyras’s works on UQ eSpace
2015
Conference Publication
Desaturation event characteristics and mortality risk in severe sleep apnea
Kulkas, Antti, Muraja-Murro, A., Leppänen, T., Tiihonen, P., Mervaala, E. and Töyräs, J. (2015). Desaturation event characteristics and mortality risk in severe sleep apnea. World Congress on Medical Physics and Biomedical Engineering (2015), Toronto, ON, Canada, 7-12 June 2015. Cham, Switzerland: Springer. doi: 10.1007/978-3-319-19387-8_231
2014
Journal Article
Importance of material properties and porosity of bone on mechanical response of articular cartilage in human knee joint - a two-dimensional finite element study
Venäläinen, Mikko S., Mononen, Mika E., Jurvelin, Jukka S., Töyräs, Juha, Virén, Tuomas and Korhonen, Rami K. (2014). Importance of material properties and porosity of bone on mechanical response of articular cartilage in human knee joint - a two-dimensional finite element study. Journal of Biomechanical Engineering, 136 (12) 121005. doi: 10.1115/1.4028801
2014
Journal Article
Dependence of light attenuation and backscattering on collagen concentration and chondrocyte density in agarose scaffolds
Puhakka, P. H., Ylärinne, J. H., Lammi, M. J., Saarakkala, S., Tiitu, V., Kröger, H., Virén, T., Jurvelin, J. S. and Töyräs, J. (2014). Dependence of light attenuation and backscattering on collagen concentration and chondrocyte density in agarose scaffolds. Physics in Medicine and Biology, 59 (21), 6537-6548. doi: 10.1088/0031-9155/59/21/6537
2014
Journal Article
Morbidity and mortality risk ratios are elevated in severe supine dominant OSA: a long-term follow-up study
Kulkas, Antti, Muraja-Murro, Anu, Tiihonen, Pekka, Mervaala, Esa and Töyräs, Juha (2014). Morbidity and mortality risk ratios are elevated in severe supine dominant OSA: a long-term follow-up study. Sleep and Breathing, 19 (2), 653-660. doi: 10.1007/s11325-014-1071-0
2014
Journal Article
Weight loss alters severity of individual nocturnal respiratory events depending on sleeping position
Kulkas, A., Leppänen, T., Sahlman, J., Tiihonen, P., Mervaala, E., Kokkarinen, J., Randell, J., Seppä, J., Töyräs, J. and Tuomilehto, H. (2014). Weight loss alters severity of individual nocturnal respiratory events depending on sleeping position. Physiological Measurement, 35 (10) 2037, 2037-2052. doi: 10.1088/0967-3334/35/10/2037
2014
Journal Article
Ultrasound arthroscopy of human knee cartilage and subchondral bone in vivo
Liukkonen, Jukka, Lehenkari, Petri, Hirvasniemi, Jukka, Joukainen, Antti, Virén, Tuomas, Saarakkala, Simo, Nieminen, Miika T., Jurvelin, Jukka S. and Töyräs, Juha (2014). Ultrasound arthroscopy of human knee cartilage and subchondral bone in vivo. Ultrasound in Medicine and Biology, 40 (9), 2039-2047. doi: 10.1016/j.ultrasmedbio.2014.04.001
2014
Journal Article
Adjustment of apnea-hypopnea index with severity of obstruction events enhances detection of sleep apnea patients with the highest risk of severe health consequences
Muraja-Murro, A., Kulkas, A., Hiltunen, M., Kupari, S., Hukkanen, T., Tiihonen, P., Mervaala, E. and Töyräs, J. (2014). Adjustment of apnea-hypopnea index with severity of obstruction events enhances detection of sleep apnea patients with the highest risk of severe health consequences. Sleep and Breathing, 18 (3), 641-647. doi: 10.1007/s11325-013-0927-z
2014
Journal Article
Collagen and chondrocyte concentrations control ultrasound scattering in aAgarose scaffolds
Inkinen, S., Liukkonen, J., Ylärinne, J. H., Puhakka, P. H., Lammi, M. J., Virén, T., Jurvelin, J. S. and Töyräs, J. (2014). Collagen and chondrocyte concentrations control ultrasound scattering in aAgarose scaffolds. Ultrasound in Medicine and Biology, 40 (9), 2162-2171. doi: 10.1016/j.ultrasmedbio.2014.03.016
2014
Journal Article
Shielded design of screen-printed EEG electrode set reduces interference pick-up
Lepola, Pasi, Myllymaa, Sami, Töyräs, Juha, Mervaala, Esa, Lappalainen, Reijo and Myllymaa, Katja (2014). Shielded design of screen-printed EEG electrode set reduces interference pick-up. IEEE Sensors Journal, 14 (8) 6780623, 2692-2697. doi: 10.1109/JSEN.2014.2314318
2014
Journal Article
Deformation of articular cartilage during static loading of a knee joint - experimental and finite element analysis
Halonen, K. S., Mononen, M. E., Jurvelin, J. S., Töyräs, J., Salo, J. and Korhonen, R. K. (2014). Deformation of articular cartilage during static loading of a knee joint - experimental and finite element analysis. Journal of Biomechanics, 47 (10), 2467-2474. doi: 10.1016/j.jbiomech.2014.04.013
2014
Journal Article
Ultrasound backscatter measurements of intact human proximal femurs - relationships of ultrasound parameters with tissue structure and mineral density
Malo, M. K.H., Töyräs, J., Karjalainen, J. P., Isaksson, H., Riekkinen, O. and Jurvelin, J. S. (2014). Ultrasound backscatter measurements of intact human proximal femurs - relationships of ultrasound parameters with tissue structure and mineral density. Bone, 64, 240-245. doi: 10.1016/j.bone.2014.04.014
2014
Journal Article
Screen-printed EEG electrode set for emergency use
Lepola, Pasi, Myllymaa, Sami, Töyräs, Juha, Muraja-Murro, Anu, Mervaala, Esa, Lappalainen, Reijo and Myllymaa, Katja (2014). Screen-printed EEG electrode set for emergency use. Sensors and Actuators, A: Physical, 213, 19-26. doi: 10.1016/j.sna.2014.03.029
2014
Journal Article
Estimation of fixed charge density and diffusivity profiles in cartilage using contrast enhanced computer tomography
Huttunen, J. M. J., Kokkonen, H. T., Jurvelin, J. S., Töyräs, J. and Kaipio, J. P. (2014). Estimation of fixed charge density and diffusivity profiles in cartilage using contrast enhanced computer tomography. International Journal for Numerical Methods in Engineering, 98 (5), 371-390. doi: 10.1002/nme.4634
2014
Journal Article
Assessment of myocardial perfusion with MRI using a modified dual bolus method
Husso, M., Sipola, P., Kuittinen, T., Manninen, H., Vainio, P., Hartikainen, J., Saarakkala, S., Töyräs, J. and Kuikka, J. (2014). Assessment of myocardial perfusion with MRI using a modified dual bolus method. Physiological Measurement, 35 (4), 533-547. doi: 10.1088/0967-3334/35/4/533
2014
Journal Article
In vivo diagnostics of human knee cartilage lesions using delayed CBCT arthrography
Kokkonen, Harri T., Suomalainen, Juha-Sampo, Joukainen, Antti, Kröger, Heikki, Sirola, Joonas, Jurvelin, Jukka S., Salo, Jari and Töyräs, Juha (2014). In vivo diagnostics of human knee cartilage lesions using delayed CBCT arthrography. Journal of Orthopaedic Research, 32 (3), 403-412. doi: 10.1002/jor.22521
2014
Journal Article
Application of optical coherence tomography enhances reproducibility of arthroscopic evaluation of equine joints
Niemelä, Tytti, Virén, Tuomas, Liukkonen, Jukka, Argüelles, David, te Moller, Nikae C R, Puhakka, Pia H, Jurvelin, Jukka S, Tulamo, Riitta-Mari and Töyräs, Juha (2014). Application of optical coherence tomography enhances reproducibility of arthroscopic evaluation of equine joints. Acta veterinaria Scandinavica, 56 3. doi: 10.1186/1751-0147-56-3
2014
Journal Article
Effects of freeze-thaw cycle with and without proteolysis inhibitors and cryopreservant on the biochemical and biomechanical properties of articular cartilage
Qu, Chengjuan, Hirviniemi, Mikko, Tiitu, Virpi, Jurvelin, Jukka S., Töyräs, Juha and Lammi, Mikko J. (2014). Effects of freeze-thaw cycle with and without proteolysis inhibitors and cryopreservant on the biochemical and biomechanical properties of articular cartilage. Cartilage, 5 (2), 97-106. doi: 10.1177/1947603513515998
2013
Journal Article
The severity of individual obstruction events is related to increased mortality rate in severe obstructive sleep apnea
Muraja-Murro, Anu, Kulkas, Antti, Hiltunen, Mikko, Kupari, Salla, Hukkanen, Taina, Tiihonen, Pekka, Mervaala, Esa and Töyräs, Juha (2013). The severity of individual obstruction events is related to increased mortality rate in severe obstructive sleep apnea. Journal of Sleep Research, 22 (6), 663-669. doi: 10.1111/jsr.12070
2013
Journal Article
Diffusion of ionic and non-ionic contrast agents in articular cartilage with increased cross-linking - contribution of steric and electrostatic effects
Kulmala, K. A M, Karjalainen, H. M., Kokkonen, H. T., Tiitu, V., Kovanen, V., Lammi, M. J., Jurvelin, J. S., Korhonen, R. K. and Töyräs, J. (2013). Diffusion of ionic and non-ionic contrast agents in articular cartilage with increased cross-linking - contribution of steric and electrostatic effects. Medical Engineering and Physics, 35 (10), 1415-1420. doi: 10.1016/j.medengphy.2013.03.010
2013
Journal Article
Arthroscopic optical coherence tomography provides detailed information on articular cartilage lesions in horses
Te Moller, N. C.R., Brommer, H., Liukkonen, J., Virén, T., Timonen, M., Puhakka, P. H., Jurvelin, J. S., Van Weeren, P. R. and Töyräs, J. (2013). Arthroscopic optical coherence tomography provides detailed information on articular cartilage lesions in horses. The Veterinary Journal, 197 (3), 589-595. doi: 10.1016/j.tvjl.2013.05.031
Supervision
Availability
- Professor Juha Toyras is:
- Available for supervision
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Supervision history
Current supervision
-
Doctor Philosophy
Adaptation of Raman spectroscopy for diagnostic assessment of connective tissue integrity
Associate Advisor
Other advisors: Dr Jari Torniainen, Professor Aleksandar Rakic
-
Doctor Philosophy
Obstructive sleep apnoea pathophysiology phenotypes: associations with sleepiness and vigilance
Associate Advisor
Other advisors: Dr Dwayne Mann, Associate Professor Philip Terrill
-
Doctor Philosophy
Artifical intelligence approaches for diagnosing and phenotyping sleep disorders
Associate Advisor
Other advisors: Dr Shakes Chandra, Associate Professor Philip Terrill
-
Doctor Philosophy
Raman spectroscopy for diagnostic tissue assessment
Associate Advisor
Other advisors: Dr Jari Torniainen, Professor Aleksandar Rakic
-
Doctor Philosophy
Delirium in hospital. Challenging times call for digital measures.
Associate Advisor
Other advisors: Professor Gerard Byrne, Dr Peter Worthy, Professor Nadeeka Dissanayaka
-
Doctor Philosophy
Artificial intelligence and mechanistic physiology approaches for diagnosing and phenotyping sleep disorders
Associate Advisor
Other advisors: Dr Dwayne Mann, Associate Professor Philip Terrill
-
Doctor Philosophy
Integrating Wearable Devices into the Patient-Centred Digital Healthcare Environment
Associate Advisor
Other advisors: Associate Professor Chelsea Dobbins
-
Doctor Philosophy
Artifical intelligence approaches for diagnosing and phenotyping sleep disorders
Associate Advisor
Other advisors: Dr Shakes Chandra, Associate Professor Philip Terrill
-
Doctor Philosophy
New deep learning based methods for assessment of sleep apnea severity and risk of related short and long term health consequences
Associate Advisor
Other advisors: Dr Shakes Chandra, Associate Professor Philip Terrill
-
Doctor Philosophy
New deep learning based methods for assessment of sleep apnea severity and risk of related short and long term health consequences
Associate Advisor
Other advisors: Dr Shakes Chandra, Associate Professor Philip Terrill
-
Doctor Philosophy
Artificial intelligence and mechanistic physiology approaches for diagnosing and phenotyping sleep disorders
Associate Advisor
Other advisors: Dr Dwayne Mann, Associate Professor Philip Terrill
Completed supervision
-
2024
Doctor Philosophy
Integrating Wearable Devices into the Patient-Centred Digital Healthcare Environment
Associate Advisor
Other advisors: Associate Professor Chelsea Dobbins
Media
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