
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
2025
Journal Article
Dual-Contrast Agent with Nanoparticle and Molecular Components in Photon-Counting Computed Tomography: Assessing Articular Cartilage Health
Paakkari, Petri, Inkinen, Satu I., Jäntti, Jiri, Tuppurainen, Juuso, Fugazzola, Maria C., Joenathan, Anisha, Ylisiurua, Sampo, Nieminen, Miika T., Kröger, Heikki, Mikkonen, Santtu, van Weeren, René, Snyder, Brian D., Töyräs, Juha, Honkanen, Miitu K. M., Matikka, Hanna, Grinstaff, Mark W., Honkanen, Juuso T. J. and Mäkelä, Janne T. A. (2025). Dual-Contrast Agent with Nanoparticle and Molecular Components in Photon-Counting Computed Tomography: Assessing Articular Cartilage Health. Annals of Biomedical Engineering, 1-16. doi: 10.1007/s10439-025-03715-0
2025
Journal Article
Hybrid discrete and finite element analysis enables fast evaluation of hip joint cartilage mechanical response
Venäläinen, Mikko S., Li, Mao, Töyräs, Juha, Korhonen, Rami K., Fripp, Jurgen, Crozier, Stuart, Chandra, Shekhar S. and Engstrom, Craig (2025). Hybrid discrete and finite element analysis enables fast evaluation of hip joint cartilage mechanical response. Journal of Biomechanics, 182 112568, 1-6. doi: 10.1016/j.jbiomech.2025.112568
2025
Journal Article
Machine learning approaches for the fusion of near-infrared, mid-infrared, and Raman data to identify cartilage degradation in human osteochondral plugs
Tafintseva, Valeria, Nippolainen, Ervin, Virtanen, Vesa, Solheim, Johanne Heitmann, Zimmermann, Boris, Saarakkala, Simo, Kröger, Heikki, Kohler, Achim, Töyräs, Juha, Afara, Isaac O. and Shaikh, Rubina (2025). Machine learning approaches for the fusion of near-infrared, mid-infrared, and Raman data to identify cartilage degradation in human osteochondral plugs. Applied Spectroscopy, 79 (3), 385-395. doi: 10.1177/00037028241285583
2025
Journal Article
Community prevalence of positional obstructive sleep apnea
Duce, Brett L., Kulkas, Antti E., Leppänen, Timo T., Oksenberg, Arie, Töyräs, Juha and Hukins, Craig A. (2025). Community prevalence of positional obstructive sleep apnea. Journal of Clinical Sleep Medicine. doi: 10.5664/jcsm.11584
2025
Journal Article
The Relationship Between the Optical Properties of Articular Cartilage and the Biomechanical Parameters of the Tissue
Kafian-Attari, Iman, Ebrahimi, Mohammad, Nippolainen, Ervin, Mirhashemi, Arash, Paakkari, Petri, Bergmann, Florian, Foschum, Florian, Kienle, Alwin, Toyras, Juha and Afara, Isaac (2025). The Relationship Between the Optical Properties of Articular Cartilage and the Biomechanical Parameters of the Tissue. Journal of Biophotonics. doi: 10.1002/jbio.202400460
2024
Journal Article
Photon-counting in dual-contrast-enhanced computed tomography: a proof-of-concept quantitative biomechanical assessment of articular cartilage
Paakkari, Petri, Inkinen, Satu I., Mohammadi, Ali, Nieminen, Miika T., Joenathan, Anisha, Grinstaff, Mark W., Töyräs, Juha, Mäkelä, Janne T. A. and Honkanen, Juuso T. J. (2024). Photon-counting in dual-contrast-enhanced computed tomography: a proof-of-concept quantitative biomechanical assessment of articular cartilage. Scientific Reports, 14 (1) 29956, 1-14. doi: 10.1038/s41598-024-78237-1
2024
Journal Article
The human patellar tendon is mechanically homogenous at its mid-substance
Kositsky, Adam, Stenroth, Lauri, Nippolainen, Ervin, Torniainen, Jari, Mäkelä, Janne T.A., Paakkari, Petri, Paakkonen, Tommi, Kröger, Heikki, Töyräs, Juha, Afara, Isaac O. and Korhonen, Rami K. (2024). The human patellar tendon is mechanically homogenous at its mid-substance. Journal of the Mechanical Behavior of Biomedical Materials, 163 106875, 106875. doi: 10.1016/j.jmbbm.2024.106875
2024
Journal Article
Temporal and sleep stage‐dependent agreement in manual scoring of respiratory events
Pitkänen, Minna, Pitkänen, Henna, Nath, Rajdeep Kumar, Nikkonen, Sami, Kainulainen, Samu, Korkalainen, Henri, Ólafsdóttir, Kristín Anna, Arnardottir, Erna Sif, Sigurdardottir, Sigridur, Penzel, Thomas, Fanfulla, Francesco, Anttalainen, Ulla, Saaresranta, Tarja, Grote, Ludger, Hedner, Jan, Staats, Richard, Töyräs, Juha and Leppänen, Timo (2024). Temporal and sleep stage‐dependent agreement in manual scoring of respiratory events. Journal of Sleep Research, e14391. doi: 10.1111/jsr.14391
2024
Journal Article
Retrospective validation of automatic sleep analysis with grey areas model for human‐in‐the‐loop scoring approach
Rusanen, Matias, Jouan, Gabriel, Huttunen, Riku, Nikkonen, Sami, Sigurðardóttir, Sigríður, Töyräs, Juha, Duce, Brett, Myllymaa, Sami, Arnardottir, Erna Sif, Leppänen, Timo, Islind, Anna Sigridur, Kainulainen, Samu and Korkalainen, Henri (2024). Retrospective validation of automatic sleep analysis with grey areas model for human‐in‐the‐loop scoring approach. Journal of Sleep Research, e14362. doi: 10.1111/jsr.14362
2024
Conference Publication
Worsening hypoxic load impairs cardiorespiratory coupling
Hietakoste, Salla, Armañac-Julián, Pablo, Karhu, Tuomas, Bailón, Raquel, Sillanmäki, Saara, Töyräs, Juha, Leppänen, Timo, Myllymaa, Sami and Kainulainen, Samu (2024). Worsening hypoxic load impairs cardiorespiratory coupling. 2024 13th Conference of the European Study Group on Cardiovascular Oscillations: Physiologically-Guided Signal Processing of Cardiovascular and Cerebrovascular Oscillations, ESGCO 2024, Zaragoza, Spain, 23-25 October 2024. Piscataway, NJ, United States: Institute of Electrical and Electronics Engineers. doi: 10.1109/esgco63003.2024.10767029
2024
Journal Article
Arousal burden is highest in supine sleeping position and during light sleep
Pitkänen, Minna, Huovinen, Juho, Rissanen, Marika, Pitkänen, Henna, Kainulainen, Samu, Penzel, Thomas, Fanfulla, Francesco, Anttalainen, Ulla, Saaresranta, Tarja, Grote, Ludger, Hedner, Jan, Staats, Richard, Duce, Brett, Töyräs, Juha, Oksenberg, Arie and Leppänen, Timo (2024). Arousal burden is highest in supine sleeping position and during light sleep. Journal of Clinical Sleep Medicine, 21 (2), 337-344. doi: 10.5664/jcsm.11398
2024
Conference Publication
Ventilatory burden predicts change in self‑reported sleepiness following continuous positive airway pressure treatment in obstructive sleep apnoea
Staykov, E., Mann, D., Duce, B., Kainulainen, S., Leppänen, T., Töyräs, J., Azarbarzin, A., Sands, S. and Terrill, P. (2024). Ventilatory burden predicts change in self‑reported sleepiness following continuous positive airway pressure treatment in obstructive sleep apnoea. 2024 Australasian Sleep Association, Gold Coast, QLD Australia, 16-19 October 2024. Oxford, United Kingdom: Oxford University Press. doi: 10.1093/sleepadvances/zpae070.090
2024
Conference Publication
O004 Incorporating Arousals into Sleep vs. Wakefulness Classification Outperforms Traditional Binary Classification at 1-Second Epoch Resolution
Somaskandhan, P., Korkalainen, H., Leppänen, T., Töyräs, J., Melehan, K., Wilson, D., Ruehland, W., Mann, D. and Terrill, P. (2024). O004 Incorporating Arousals into Sleep vs. Wakefulness Classification Outperforms Traditional Binary Classification at 1-Second Epoch Resolution. Sleep DownUnder 2024, Gold Coast, QLD Australia, 16-19 October 2024. Oxford, United Kingdom: Oxford University Press. doi: 10.1093/sleepadvances/zpae070.004
2024
Journal Article
An automated and robust tool for musculoskeletal and finite element modeling of the knee joint
Esrafilian, Amir, Chandra, Shekhar S., Gatti, Anthony A., Nissi, Mikko, Mustonen, Anne-Mari, Saisanen, Laura, Reijonen, Jusa, Nieminen, Petteri, Julkunen, Petro, Toyras, Juha, Saxby, David J., Lloyd, David G. and Korhonen, Rami K. (2024). An automated and robust tool for musculoskeletal and finite element modeling of the knee joint. IEEE Transactions on Biomedical Engineering, 72 (1), 1-13. doi: 10.1109/tbme.2024.3438272
2024
Journal Article
Relationship between depth-wise refractive index and biomechanical properties of human articular cartilage
Khan, Bilour, Nippolainen, Ervin, Shahini, Fatemeh, Nonappa, , Popov, Alexey, Töyräs, Juha and Afara, Isaac O. (2024). Relationship between depth-wise refractive index and biomechanical properties of human articular cartilage. Journal of biomedical optics, 29 (9) 095003, 095003-095003. doi: 10.1117/1.JBO.29.9.095003
2024
Journal Article
“An excellent servant but a terrible master”: understanding the value of wearables for self-management in people with cystic fibrosis and their healthcare providers – a qualitative study
Mattison, Graeme, Canfell, Oliver J., Smith, Daniel, Forrester, Doug, Reid, David, Töyräs, Juha and Dobbins, Chelsea (2024). “An excellent servant but a terrible master”: understanding the value of wearables for self-management in people with cystic fibrosis and their healthcare providers – a qualitative study. International Journal of Medical Informatics, 189 105532, 105532. doi: 10.1016/j.ijmedinf.2024.105532
2024
Journal Article
Estimation of photon path length and penetration depth in articular cartilage zonal architecture over the therapeutic window
Kafian-Attari, I., Nippolainen, E., Bergmann, F., George, A., Paakkari, P., Mirhashemi, A., Foschum, F., Kienle, A., Toyras, J. and Afara, I. O. (2024). Estimation of photon path length and penetration depth in articular cartilage zonal architecture over the therapeutic window. IEEE Transactions on Biomedical Engineering, 71 (8), 2300-2310. doi: 10.1109/TBME.2024.3368012
2024
Journal Article
Infrared spectroscopy can differentiate between cartilage injury models: implication for assessment of cartilage integrity
Shahini, Fatemeh, Oskouei, Soroush, Nippolainen, Ervin, Mohammadi, Ali, Sarin, Jaakko K., Moller, Nikae C. R. te, Brommer, Harold, Shaikh, Rubina, Korhonen, Rami K., van Weeren, P. René, Töyräs, Juha and Afara, Isaac O. (2024). Infrared spectroscopy can differentiate between cartilage injury models: implication for assessment of cartilage integrity. Annals of Biomedical Engineering, 52 (9), 2521-2533. doi: 10.1007/s10439-024-03540-x
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
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
Supervision
Availability
- Professor Juha Toyras is:
- Available for supervision
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Supervision history
Current supervision
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Doctor Philosophy
Adaptation of Raman spectroscopy for diagnostic assessment of connective tissue integrity
Associate Advisor
Other advisors: Dr Jari Torniainen, Professor Aleksandar Rakic
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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
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Doctor Philosophy
Raman spectroscopy for diagnostic tissue assessment
Associate Advisor
Other advisors: Dr Jari Torniainen, Professor Aleksandar Rakic
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Doctor Philosophy
Delirium in hospital. Challenging times call for digital measures.
Associate Advisor
Other advisors: Professor Gerard Byrne, Dr Peter Worthy, Professor Nadeeka Dissanayaka
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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
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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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