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Professor Juha Toyras
Professor

Juha Toyras

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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

398 works between 1999 and 2025

261 - 280 of 398 works

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

Desaturation event characteristics and mortality risk in severe sleep apnea

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

Importance of material properties and porosity of bone on mechanical response of articular cartilage in human knee joint - a two-dimensional finite element study

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

Dependence of light attenuation and backscattering on collagen concentration and chondrocyte density in agarose scaffolds

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

Morbidity and mortality risk ratios are elevated in severe supine dominant OSA: a long-term follow-up study

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

Weight loss alters severity of individual nocturnal respiratory events depending on sleeping position

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

Ultrasound arthroscopy of human knee cartilage and subchondral bone in vivo

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

Adjustment of apnea-hypopnea index with severity of obstruction events enhances detection of sleep apnea patients with the highest risk of severe health consequences

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

Collagen and chondrocyte concentrations control ultrasound scattering in aAgarose scaffolds

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

Shielded design of screen-printed EEG electrode set reduces interference pick-up

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

Deformation of articular cartilage during static loading of a knee joint - experimental and finite element analysis

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

Ultrasound backscatter measurements of intact human proximal femurs - relationships of ultrasound parameters with tissue structure and mineral density

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

Screen-printed EEG electrode set for emergency use

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

Estimation of fixed charge density and diffusivity profiles in cartilage using contrast enhanced computer tomography

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

Assessment of myocardial perfusion with MRI using a modified dual bolus method

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

In vivo diagnostics of human knee cartilage lesions using delayed CBCT arthrography

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

Application of optical coherence tomography enhances reproducibility of arthroscopic evaluation of equine joints

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

Effects of freeze-thaw cycle with and without proteolysis inhibitors and cryopreservant on the biochemical and biomechanical properties of articular cartilage

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

The severity of individual obstruction events is related to increased mortality rate in severe obstructive sleep apnea

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

Diffusion of ionic and non-ionic contrast agents in articular cartilage with increased cross-linking - contribution of steric and electrostatic effects

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

Arthroscopic optical coherence tomography provides detailed information on articular cartilage lesions in horses

Funding

Current funding

  • 2021 - 2025
    Revolution of sleep diagnostics and personalized health care based on digital diagnostics and therapeutics with health data integration
    NHMRC European Union Collaborative Research Grants
    Open grant
  • 2021 - 2025
    Revolution of sleep diagnostics and personalized health care based on digital diagnostics and therapeutics with health data integration
    University of Reykjavik
    Open grant

Past funding

  • 2021 - 2024
    Deep learning and physiology based approach to derive and link obstructive sleep apnoea phenotypes and symptomatology
    NHMRC IDEAS Grants
    Open grant
  • 2021 - 2024
    Osteoarthritis Compass: Personalized prediction of disease onset and progression. (NHMRC Ideas Grant administered by Griffith University)
    Griffith University
    Open grant

Supervision

Availability

Professor Juha Toyras is:
Available for supervision

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Supervision history

Current supervision

Completed supervision

Media

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