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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

406 works between 1999 and 2025

281 - 300 of 406 works

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

Novel parameters reflect changes in morphology of respiratory events during weight loss

Kulkas, A., Leppänen, T., Sahlman, J., Tiihonen, P., Mervaala, E., Kokkarinen, J., Randell, J., Seppä, J., Tuomilehto, H. and Töyräs, J. (2013). Novel parameters reflect changes in morphology of respiratory events during weight loss. Physiological Measurement, 34 (9), 1013-1026. doi: 10.1088/0967-3334/34/9/1013

Novel parameters reflect changes in morphology of respiratory events during weight loss

2013

Journal Article

Mortality in middle-aged men with obstructive sleep apnea in Finland

Muraja-Murro, A., Eskola, K., Kolari, T., Tiihonen, P., Hukkanen, T., Tuomilehto, H., Peltonen, M., Mervaala, E. and Töyräs, J. (2013). Mortality in middle-aged men with obstructive sleep apnea in Finland. Sleep and Breathing, 17 (3), 1047-1053. doi: 10.1007/s11325-012-0798-8

Mortality in middle-aged men with obstructive sleep apnea in Finland

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

2013

Journal Article

Arthroscopic ultrasound technique for simultaneous quantitative assessment of articular cartilage and subchondral bone: an in vitro and in vivo feasibility study

Liukkonen, J., Hirvasniemi, J., Joukainen, A., Penttilä, P., Virén, T., Saarakkala, S., Kröger, H., Jurvelin, J. S. and Töyräs, J. (2013). Arthroscopic ultrasound technique for simultaneous quantitative assessment of articular cartilage and subchondral bone: an in vitro and in vivo feasibility study. Ultrasound in Medicine and Biology, 39 (8), 1460-1468. doi: 10.1016/j.ultrasmedbio.2013.03.026

Arthroscopic ultrasound technique for simultaneous quantitative assessment of articular cartilage and subchondral bone: an in vitro and in vivo feasibility study

2013

Journal Article

Novel parameters indicate significant differences in severity of obstructive sleep apnea with patients having similar apnea-hypopnea index

Kulkas, Antti, Tiihonen, Pekka, Julkunen, Petro, Mervaala, Esa and Töyräs, Juha (2013). Novel parameters indicate significant differences in severity of obstructive sleep apnea with patients having similar apnea-hypopnea index. Medical and Biological Engineering and Computing, 51 (6), 697-708. doi: 10.1007/s11517-013-1039-4

Novel parameters indicate significant differences in severity of obstructive sleep apnea with patients having similar apnea-hypopnea index

2013

Journal Article

New disposable forehead electrode set with excellent signal quality and imaging compatibility

Myllymaa, Sami, Lepola, Pasi, Töyräs, Juha, Hukkanen, Taina, Mervaala, Esa, Lappalainen, Reijo and Myllymaa, Katja (2013). New disposable forehead electrode set with excellent signal quality and imaging compatibility. Journal of Neuroscience Methods, 215 (1), 103-109. doi: 10.1016/j.jneumeth.2013.02.003

New disposable forehead electrode set with excellent signal quality and imaging compatibility

2013

Journal Article

Importance of depth-wise distribution of collagen and proteoglycans in articular cartilage - a 3D finite element study of stresses and strains in human knee joint

Halonen, K. S., Mononen, M. E., Jurvelin, J. S., Töyräs, J. and Korhonen, R. K. (2013). Importance of depth-wise distribution of collagen and proteoglycans in articular cartilage - a 3D finite element study of stresses and strains in human knee joint. Journal of Biomechanics, 46 (6), 1184-1192. doi: 10.1016/j.jbiomech.2012.12.025

Importance of depth-wise distribution of collagen and proteoglycans in articular cartilage - a 3D finite element study of stresses and strains in human knee joint

2013

Journal Article

Longitudinal elastic properties and porosity of cortical bone tissue vary with age in human proximal femur

Malo, M. K. H., Rohrbach, D., Isaksson, H., Töyräs, J., Jurvelin, J. S., Tamminen, I. S., Kröger, H. and Raum, K. (2013). Longitudinal elastic properties and porosity of cortical bone tissue vary with age in human proximal femur. Bone, 53 (2), 451-458. doi: 10.1016/j.bone.2013.01.015

Longitudinal elastic properties and porosity of cortical bone tissue vary with age in human proximal femur

2013

Journal Article

In vivo comparison of delayed gadolinium-enhanced MRI of cartilage and delayed quantitative CT arthrography in imaging of articular cartilage

Hirvasniemi, J., Kulmala, K. A M, Lammentausta, E., Ojala, R., Lehenkari, P., Kamel, A., Jurvelin, J. S., Töyräs, J., Nieminen, M. T. and Saarakkala, S. (2013). In vivo comparison of delayed gadolinium-enhanced MRI of cartilage and delayed quantitative CT arthrography in imaging of articular cartilage. Osteoarthritis and Cartilage, 21 (3), 434-442. doi: 10.1016/j.joca.2012.12.009

In vivo comparison of delayed gadolinium-enhanced MRI of cartilage and delayed quantitative CT arthrography in imaging of articular cartilage

2013

Journal Article

Repair of osteochondral defects with recombinant human type II collagen gel and autologous chondrocytes in rabbit

Pulkkinen, H. J., Tiitu, V., Valonen, P., Jurvelin, J. S., Rieppo, L., Töyräs, J., Silvast, T. S., Lammi, M. J. and Kiviranta, I. (2013). Repair of osteochondral defects with recombinant human type II collagen gel and autologous chondrocytes in rabbit. Osteoarthritis and Cartilage, 21 (3), 481-490. doi: 10.1016/j.joca.2012.12.004

Repair of osteochondral defects with recombinant human type II collagen gel and autologous chondrocytes in rabbit

2013

Journal Article

Novel parameters for evaluating severity of sleep disordered breathing and for supporting diagnosis of sleep apnea-hypopnea syndrome

Kulkas, A., Tiihonen, P., Eskola, K., Julkunen, P., Mervaala, E. and Töyräs, J. (2013). Novel parameters for evaluating severity of sleep disordered breathing and for supporting diagnosis of sleep apnea-hypopnea syndrome. Journal of Medical Engineering and Technology, 37 (2), 135-143. doi: 10.3109/03091902.2012.754509

Novel parameters for evaluating severity of sleep disordered breathing and for supporting diagnosis of sleep apnea-hypopnea syndrome

2013

Journal Article

Bath concentration of anionic contrast agents does not affect their diffusion and distribution in articular cartilage in vitro

Silvast, Tuomo S., Jurvelin, Jukka S., Tiitu, Virpi, Quinn, Thomas M. and Töyräs, Juha (2013). Bath concentration of anionic contrast agents does not affect their diffusion and distribution in articular cartilage in vitro. Cartilage, 4 (1), 42-51. doi: 10.1177/1947603512451023

Bath concentration of anionic contrast agents does not affect their diffusion and distribution in articular cartilage in vitro

2013

Conference Publication

Novel screen printed electrode set for routine EEG recordings in patients with altered mental status

Myllymaa, Sami, Lepola, Pasi, Hukkanen, Taina, Oun, Andre, Mervaala, Esa, Toyras, Juha, Lappalainen, Reijo and Myllymaa, Katja (2013). Novel screen printed electrode set for routine EEG recordings in patients with altered mental status. 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2013, Osaka, Japan, 3-7 July 2013. Piscataway, NJ, United States: Institute of Electrical and Electronics Engineers. doi: 10.1109/EMBC.2013.6611099

Novel screen printed electrode set for routine EEG recordings in patients with altered mental status

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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