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
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, 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. 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
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, 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
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, 112135. doi: 10.1016/j.jbiomech.2024.112135
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
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. doi: 10.1111/jsr.13988
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, 01051-2023. doi: 10.1183/23120541.01051-2023
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
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
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
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
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
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
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, PP (99), 1-11. doi: 10.1109/TBME.2024.3368012
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, 1-1. doi: 10.1109/jtehm.2024.3349916
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
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
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
Funding
Current funding
Supervision
Availability
- Professor Juha Toyras is:
- Available for supervision
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Supervision history
Current supervision
-
Doctor Philosophy
Integrating Wearable Devices into the Patient-Centred Digital Healthcare Environment
Associate Advisor
Other advisors: Dr Chelsea Dobbins
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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
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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
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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
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
Delirium in hospital. Challenging times call for digital measures.
Associate Advisor
Other advisors: Professor Gerard Byrne, Dr Peter Worthy, Associate Professor Nadeeka Dissanayaka
Media
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