Skip to menu Skip to content Skip to footer
Professor Juha Toyras
Professor

Juha Toyras

Email: 

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

399 works between 1999 and 2025

21 - 40 of 399 works

2024

Journal Article

Laser-irradiating infrared attenuated total reflection spectroscopy of articular cartilage: potential and challenges for diagnosing osteoarthritis

Krebs, P., Nägele, M., Fomina, P., Virtanen, V., Nippolainen, E., Shaikh, R., Afara, I. O., Töyräs, J., Usenov, I., Sakharova, T., Artyushenko, V., Tafintseva, V., Solheim, J.H., Zimmermann, B., Kohler, A., König, O., Saarakkala, S. and Mizaikoff, B. (2024). Laser-irradiating infrared attenuated total reflection spectroscopy of articular cartilage: potential and challenges for diagnosing osteoarthritis. Osteoarthritis and Cartilage Open, 6 (2) 100466. doi: 10.1016/j.ocarto.2024.100466

Laser-irradiating infrared attenuated total reflection spectroscopy of articular cartilage: potential and challenges for diagnosing osteoarthritis

2024

Journal Article

Sleep stage continuity is associated with objective daytime sleepiness in patients with suspected obstructive sleep apnea

Chen, Xin, Leppänen, Timo, Kainulainen, Samu, Howarth, Timothy P., Oksenberg, Arie, Töyräs, Juha, Terrill, Philip I. and Korkalainen, Henri (2024). Sleep stage continuity is associated with objective daytime sleepiness in patients with suspected obstructive sleep apnea. Journal of Clinical Sleep Medicine, 20 (10), 1595-1606. doi: 10.5664/jcsm.11198

Sleep stage continuity is associated with objective daytime sleepiness in patients with suspected obstructive sleep apnea

2024

Journal Article

Site-specific elastic and viscoelastic biomechanical properties of healthy and osteoarthritic human knee joint articular cartilage

Linus, Awuniji, Tanska, Petri, Nippolainen, Ervin, Tiitu, Virpi, Töyras, Juha, Korhonen, Rami K., Afara, Isaac O. and Mononen, Mika E. (2024). Site-specific elastic and viscoelastic biomechanical properties of healthy and osteoarthritic human knee joint articular cartilage. Journal of Biomechanics, 169 112135. doi: 10.1016/j.jbiomech.2024.112135

Site-specific elastic and viscoelastic biomechanical properties of healthy and osteoarthritic human knee joint articular cartilage

2024

Journal Article

Reaction time in psychomotor vigilance task is related to hypoxic load in males with sleep apnea

Pahari, Purbanka, Korkalainen, Henri, Karhu, Tuomas, Arnardottir, Erna Sif, Töyräs, Juha, Leppänen, Timo and Nikkonen, Sami (2024). Reaction time in psychomotor vigilance task is related to hypoxic load in males with sleep apnea. Journal of Sleep Research, 33 (2) e13988, e13988. doi: 10.1111/jsr.13988

Reaction time in psychomotor vigilance task is related to hypoxic load in males with sleep apnea

2024

Journal Article

Increased flow limitation during sleep is associated with increased psychomotor vigilance task lapses in individuals with suspected obstructive sleep apnea

Staykov, Eric, Mann, Dwayne L., Duce, Brett, Kainulainen, Samu, Leppänen, Timo, Töyräs, Juha, Azarbarzin, Ali, Georgeson, Thomas, Sands, Scott A. and Terrill, Philip I. (2024). Increased flow limitation during sleep is associated with increased psychomotor vigilance task lapses in individuals with suspected obstructive sleep apnea. CHEST, 165 (4), 990-1003. doi: 10.1016/j.chest.2023.11.031

Increased flow limitation during sleep is associated with increased psychomotor vigilance task lapses in individuals with suspected obstructive sleep apnea

2024

Journal Article

Prolonged lung-to-finger circulation time indicates an increased risk of intermittent hypoxemia in sleep apnea patients

Pahari, Purbanka, Korkalainen, Henri, Arnardóttir, Erna Sif, Islind, Anna Sigridur, August, Elias, Oksenberg, Arie, Töyräs, Juha, Leppänen, Timo and Nikkonen, Sami (2024). Prolonged lung-to-finger circulation time indicates an increased risk of intermittent hypoxemia in sleep apnea patients. ERJ Open Research, 10 (4) 01051-2023, 1-12. doi: 10.1183/23120541.01051-2023

Prolonged lung-to-finger circulation time indicates an increased risk of intermittent hypoxemia in sleep apnea patients

2024

Journal Article

Cationic tantalum oxide nanoparticle contrast agent for micro computed tomography reveals articular cartilage proteoglycan distribution and collagen architecture alterations

Jäntti, Jiri, Joenathan, Anisha, Fugazzola, Maria, Tuppurainen, Juuso, Honkanen, Juuso T. J., Töyräs, Juha, van Weeren, René, Snyder, Brian D., Grinstaff, Mark W., Matikka, Hanna and Mäkelä, Janne T.A. (2024). Cationic tantalum oxide nanoparticle contrast agent for micro computed tomography reveals articular cartilage proteoglycan distribution and collagen architecture alterations. Osteoarthritis and Cartilage, 32 (3), 299-309. doi: 10.1016/j.joca.2023.11.020

Cationic tantalum oxide nanoparticle contrast agent for micro computed tomography reveals articular cartilage proteoglycan distribution and collagen architecture alterations

2024

Journal Article

Beat-to-beat cardiac repolarization lability increases during hypoxemia and arousals in obstructive sleep apnea patients

Ebrahimian, Serajeddin, Sillanmäki, Saara, Hietakoste, Salla, Kulkas, Antti, Töyräs, Juha, Bailon, Raquel, Hernando, David, Lombardi, Carolina, Grote, Ludger, Bonsignore, Maria R, Saaresranta, Tarja, Pépin, Jean-Louis, Leppänen, Timo and Kainulainen, Samu (2024). Beat-to-beat cardiac repolarization lability increases during hypoxemia and arousals in obstructive sleep apnea patients. American Journal of Physiology-Heart and Circulatory Physiology, 326 (5), H1094-H1104. doi: 10.1152/ajpheart.00760.2023

Beat-to-beat cardiac repolarization lability increases during hypoxemia and arousals in obstructive sleep apnea patients

2024

Journal Article

Variation in the photoplethysmogram response to arousal from sleep depending on the cause of arousal and the presence of desaturation

Luukinen, Mieli, Pitkänen, Henna, Leppänen, Timo, Töyräs, Juha, Islind, Anna Sigridur, Kainulainen, Samu and Korkalainen, Henri (2024). Variation in the photoplethysmogram response to arousal from sleep depending on the cause of arousal and the presence of desaturation. IEEE Journal of Translational Engineering in Health and Medicine, 12, 328-339. doi: 10.1109/jtehm.2024.3349916

Variation in the photoplethysmogram response to arousal from sleep depending on the cause of arousal and the presence of desaturation

2024

Journal Article

Triple contrast computed tomography reveals site‐specific biomechanical differences in the human knee joint—A proof of concept study

Orava, Heta, Paakkari, Petri, Jäntti, Jiri, Honkanen, Miitu K. M., Honkanen, Juuso T. J., Virén, Tuomas, Joenathan, Anisha, Tanska, Petri, Korhonen, Rami K., Grinstaff, Mark W., Töyräs, Juha and Mäkelä, Janne T. A. (2024). Triple contrast computed tomography reveals site‐specific biomechanical differences in the human knee joint—A proof of concept study. Journal of Orthopaedic Research, 42 (2), 415-424. doi: 10.1002/jor.25683

Triple contrast computed tomography reveals site‐specific biomechanical differences in the human knee joint—A proof of concept study

2024

Conference Publication

Comparing novel electrophysiological biomarkers and circulating cardiac biomarkers in predicting cardiovascular mortality and all-cause mortality in the Akershus Sleep Apnea (ASAP) epidemiological cohort

Hrubos-Strøm, H., Øverby, T.C., Sigurdardottir, F., Feng, X., Nikkonen, S., Korkalainen, H., Leppanen, T., Töyräs, J. and Arnardottir, E.S. (2024). Comparing novel electrophysiological biomarkers and circulating cardiac biomarkers in predicting cardiovascular mortality and all-cause mortality in the Akershus Sleep Apnea (ASAP) epidemiological cohort. 17th World Sleep Congress, Rio de Janeiro, Brazil, 20-25 October 2023. Amsterdam, Netherlands: Elsevier. doi: 10.1016/j.sleep.2023.11.910

Comparing novel electrophysiological biomarkers and circulating cardiac biomarkers in predicting cardiovascular mortality and all-cause mortality in the Akershus Sleep Apnea (ASAP) epidemiological cohort

2024

Journal Article

Acute cardiorespiratory coupling impairment in worsening sleep apnea-related intermittent hypoxemia

Hietakoste, Salla, Armañac-Julián, Pablo, Karhu, Tuomas, Bailón, Raquel, Sillanmäki, Saara, Töyräs, Juha, Leppänen, Timo, Myllymaa, Sami and Kainulainen, Samu (2024). Acute cardiorespiratory coupling impairment in worsening sleep apnea-related intermittent hypoxemia. IEEE Transactions on Biomedical Engineering, 71 (1), 326-333. doi: 10.1109/tbme.2023.3300079

Acute cardiorespiratory coupling impairment in worsening sleep apnea-related intermittent hypoxemia

2023

Journal Article

Respiratory event index underestimates severity of sleep apnea compared to apnea-hypopnea index

Pitkänen, Minna, Nath, Rajdeep Kumar, Korkalainen, Henri, Nikkonen, Sami, Mahamid, Alaa, Oksenberg, Arie, Duce, Brett, Töyräs, Juha, Kainulainen, Samu and Leppänen, Timo (2023). Respiratory event index underestimates severity of sleep apnea compared to apnea-hypopnea index. Sleep Advances, 5 (1) zpad054, 1-9. doi: 10.1093/sleepadvances/zpad054

Respiratory event index underestimates severity of sleep apnea compared to apnea-hypopnea index

2023

Journal Article

Broadband scattering properties of articular cartilage zones and their relationship with the heterogenous structure of articular cartilage extracellular matrix

Kafian-Attari, Iman, Nippolainen, Ervin, Bergmann, Florian, George, Akuroma, Paakkari, Petri, Mirhashemi, Arash, Foschum, Florian, Kienle, Alwin, Töyräs, Juha and Afara, Isaac O. (2023). Broadband scattering properties of articular cartilage zones and their relationship with the heterogenous structure of articular cartilage extracellular matrix. Journal of biomedical optics, 28 (12) 125003, 1-16. doi: 10.1117/1.JBO.28.12.125003

Broadband scattering properties of articular cartilage zones and their relationship with the heterogenous structure of articular cartilage extracellular matrix

2023

Conference Publication

Should Hospitals Do Contract Research? Costs, Net Monetary Benefit, and Return on Public Sector Investments in Research at Kuopio University Hospital

Väätäinen, S., Soini, E. and Töyräs, J. (2023). Should Hospitals Do Contract Research? Costs, Net Monetary Benefit, and Return on Public Sector Investments in Research at Kuopio University Hospital. ISPOR Europe 2023, Copenhagen, Denmark, 11-15 November 2023. New York, NY United States: Elsevier. doi: 10.1016/j.jval.2023.09.562

Should Hospitals Do Contract Research? Costs, Net Monetary Benefit, and Return on Public Sector Investments in Research at Kuopio University Hospital

2023

Journal Article

3D T<sub>1</sub> relaxation time measurements in an equine model of subtle post‐traumatic osteoarthritis using MB‐SWIFT

Pala, Swetha, Hänninen, Nina E., Mohammadi, Ali, Ebrahimi, Mohammadhossein, te Moller, Nikae C. R., Brommer, Harold, René van Weeren, P., Mäkelä, Janne T. A., Korhonen, Rami K., Afara, Isaac O., Töyräs, Juha, Mikkonen, Santtu, Nissi, Mikko J. and Nykänen, Olli (2023). 3D T1 relaxation time measurements in an equine model of subtle post‐traumatic osteoarthritis using MB‐SWIFT. Journal of Orthopaedic Research, 41 (12), 2657-2666. doi: 10.1002/jor.25629

3D T<sub>1</sub> relaxation time measurements in an equine model of subtle post‐traumatic osteoarthritis using MB‐SWIFT

2023

Journal Article

Review and perspective on sleep-disordered breathing research and translation to clinics

Korkalainen, Henri, Kainulainen, Samu, Islind, Anna Sigridur, Óskarsdóttir, María, Strassberger, Christian, Nikkonen, Sami, Töyräs, Juha, Kulkas, Antti, Grote, Ludger, Hedner, Jan, Sund, Reijo, Hrubos-Strom, Harald, Saavedra, Jose M., Ólafsdóttir, Kristín Anna, Ágústsson, Jón S., Terrill, Philip I., McNicholas, Walter T., Arnardóttir, Erna Sif, Leppänen, Timo and On behalf of SLEEP REVOLUTION (2023). Review and perspective on sleep-disordered breathing research and translation to clinics. Sleep Medicine Reviews, 73 101874, 1-12. doi: 10.1016/j.smrv.2023.101874

Review and perspective on sleep-disordered breathing research and translation to clinics

2023

Journal Article

Refractive index of human articular cartilage varies with tissue structure and composition

Khan, Bilour, Nippolainen, Ervin, Shahini, Fatemeh, Torniainen, Jari, Mikkonen, Santtu, Nonappa, Popov, Alexey, Töyräs, Juha and Afara, Isaac (2023). Refractive index of human articular cartilage varies with tissue structure and composition. Journal of the Optical Society of America A, 40 (12), 2205-2214. doi: 10.1364/josaa.498722

Refractive index of human articular cartilage varies with tissue structure and composition

2023

Journal Article

Self-applied somnography: technical feasibility of electroencephalography and electro-oculography signal characteristics in sleep staging of suspected sleep-disordered adults

Rusanen, Matias, Korkalainen, Henri, Gretarsdottir, Heidur, Siilak, Tiina, Olafsdottir, Kristin Anna, Töyräs, Juha, Myllymaa, Sami, Arnardottir, Erna Sif, Leppänen, Timo and Kainulainen, Samu (2023). Self-applied somnography: technical feasibility of electroencephalography and electro-oculography signal characteristics in sleep staging of suspected sleep-disordered adults. Journal of Sleep Research, 33 (2) e13977, e13977. doi: 10.1111/jsr.13977

Self-applied somnography: technical feasibility of electroencephalography and electro-oculography signal characteristics in sleep staging of suspected sleep-disordered adults

2023

Journal Article

Impact of experimental setup parameters on measurement of articular cartilage optical properties in the visible and short near-infrared spectral bands

Kafian-Attari, Iman, Nippolainen, Ervin, Bergmann, Florian, Mirhashemi, Arash, Pakkari, Petri, Foschum, Florian, Kienle, Alwin, Töyräs, Juha and Afara, Isaac (2023). Impact of experimental setup parameters on measurement of articular cartilage optical properties in the visible and short near-infrared spectral bands. Biomedical Optics Express, 14 (7), 3397-3412. doi: 10.1364/boe.488801

Impact of experimental setup parameters on measurement of articular cartilage optical properties in the visible and short near-infrared spectral bands

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

Before you email them, read our advice on how to contact a supervisor.

Supervision history

Current supervision

Completed supervision

Media

Enquiries

For media enquiries about Professor Juha Toyras's areas of expertise, story ideas and help finding experts, contact our Media team:

communications@uq.edu.au