
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
2020
Conference Publication
HYPOXEMIA DURING SLEEP DISORDERED BREATHING AND CARDIOVASCULAR DISEASE: A COMPARISON OF DIFFERENT OXYGEN DESATURATION MEASURES
Mazzotti, D. R., Leppanen, T., Sands, S., Toyras, J., Wellman, A., Kulkas, A., Redline, S., Karhu, T. and Azarbarzin, A. (2020). HYPOXEMIA DURING SLEEP DISORDERED BREATHING AND CARDIOVASCULAR DISEASE: A COMPARISON OF DIFFERENT OXYGEN DESATURATION MEASURES. 34th Annual Meeting of the Associated-Professional-Sleep-Societies (SLEEP), Philadelphia Pa, Jun 13-17, 2020. CARY: OXFORD UNIV PRESS INC.
2020
Journal Article
Comparison of water, hydroxyproline, uronic acid and elastin contents of bovine knee ligaments and patellar tendon and their relationships with biomechanical properties
Ristaniemi, A., Torniainen, J., Stenroth, L., Finnilä, M. A.J., Paakkonen, T., Töyräs, J. and Korhonen, R. K. (2020). Comparison of water, hydroxyproline, uronic acid and elastin contents of bovine knee ligaments and patellar tendon and their relationships with biomechanical properties. Journal of the Mechanical Behavior of Biomedical Materials, 104 103639, 103639. doi: 10.1016/j.jmbbm.2020.103639
2020
Journal Article
Author Correction: Artificial neural network analysis of the oxygen saturation signal enables accurate diagnostics of sleep apnea (Scientific Reports, (2019), 9, 1, (13200), 10.1038/s41598-019-49330-7)
Nikkonen, Sami, Afara, Isaac O., Leppänen, Timo and Töyräs, Juha (2020). Author Correction: Artificial neural network analysis of the oxygen saturation signal enables accurate diagnostics of sleep apnea (Scientific Reports, (2019), 9, 1, (13200), 10.1038/s41598-019-49330-7). Scientific Reports, 10 (1) 4977, 4977. doi: 10.1038/s41598-020-62003-0
2020
Journal Article
Machine learning classification of articular cartilage integrity using near infrared spectroscopy
Afara, Isaac O., Sarin, Jaakko K., Ojanen, Simo, Finnilä, Mikko A. J., Herzog, Walter, Saarakkala, Simo, Korhonen, Rami K. and Töyräs, Juha (2020). Machine learning classification of articular cartilage integrity using near infrared spectroscopy. Cellular and Molecular Bioengineering, 13 (3), 219-228. doi: 10.1007/s12195-020-00612-5
2020
Journal Article
Effect of sweating on electrode-skin contact impedances and artifacts in EEG recordings with various screen-printed Ag/Agcl electrodes
Kalevo, Laura, Myllymaa, Sami, Miettinen, Tomi, Leino, Akseli, Kainulainen, Samu, Korkalainen, Henri, Myllymaa, Katja, Toyras, Juha, Leppanen, Timo and Laitinen, Tiina (2020). Effect of sweating on electrode-skin contact impedances and artifacts in EEG recordings with various screen-printed Ag/Agcl electrodes. IEEE Access, 8 9017959, 50934-50943. doi: 10.1109/ACCESS.2020.2977172
2020
Journal Article
Severe desaturations increase psychomotor vigilance task-based median reaction time and number of lapses in obstructive sleep apnoea patients
Kainulainen, Samu, Duce, Brett, Korkalainen, Henri, Oksenberg, Arie, Leino, Akseli, Arnardottir, Erna S., Kulkas, Antti, Myllymaa, Sami, Töyräs, Juha and Leppänen, Timo (2020). Severe desaturations increase psychomotor vigilance task-based median reaction time and number of lapses in obstructive sleep apnoea patients. European Respiratory Journal, 55 (4) 1901849, 1901849. doi: 10.1183/13993003.01849-2019
2020
Journal Article
Acute stroke and TIA patients have specific polygraphic features of obstructive sleep apnea
Leino, Akseli, Westeren-Punnonen, Susanna, Töyräs, Juha, Myllymaa, Sami, Leppänen, Timo, Ylä-Herttuala, Salla, Muraja-Murro, Anu, Kantanen, Anne-Mari, Autere, Jaana, Jäkälä, Pekka, Mervaala, Esa and Myllymaa, Katja (2020). Acute stroke and TIA patients have specific polygraphic features of obstructive sleep apnea. Sleep and Breathing, 24 (4), 1495-1505. doi: 10.1007/s11325-019-02010-2
2020
Journal Article
Near infrared spectroscopy enables differentiation of mechanically and enzymatically induced cartilage injuries
Nippolainen, Ervin, Shaikh, Rubina, Virtanen, Vesa, Rieppo, Lassi, Saarakkala, Simo, Töyräs, Juha and Afara, Isaac O. (2020). Near infrared spectroscopy enables differentiation of mechanically and enzymatically induced cartilage injuries. Annals of Biomedical Engineering, 48 (9), 2343-2353. doi: 10.1007/s10439-020-02506-z
2020
Journal Article
Longer duration electroencephalogram arousals have a better relationship with impaired vigilance and health status in obstructive sleep apnoea
Duce, Brett, Kulkas, Antti, Töyräs, Juha, Terrill, Philip and Hukins, Craig (2020). Longer duration electroencephalogram arousals have a better relationship with impaired vigilance and health status in obstructive sleep apnoea. Sleep and Breathing, 25 (1), 263-270. doi: 10.1007/s11325-020-02110-4
2019
Journal Article
Mortality-risk-based apnea–hypopnea index thresholds for diagnostics of obstructive sleep apnea
Korkalainen, Henri, Töyräs, Juha, Nikkonen, Sami and Leppänen, Timo (2019). Mortality-risk-based apnea–hypopnea index thresholds for diagnostics of obstructive sleep apnea. Journal of Sleep Research, 28 (6) e12855, e12855. doi: 10.1111/jsr.12855
2019
Journal Article
Does magnetic resonance imaging provide superior reliability for achilles and patellar tendon cross-sectional area measurements compared with ultrasound imaging?
Stenroth, Lauri, Sefa, Sandra, Arokoski, Jari and Töyräs, Juha (2019). Does magnetic resonance imaging provide superior reliability for achilles and patellar tendon cross-sectional area measurements compared with ultrasound imaging?. Ultrasound in Medicine and Biology, 45 (12), 3186-3198. doi: 10.1016/j.ultrasmedbio.2019.08.001
2019
Conference Publication
Differentiating Sleepy and non-sleepy obstructive sleep apnea patients using nocturnal pulse oximetry and deep learning
Kainulainen, S., Toyras, J., Oksenberg, A., Korkalainen, H., Afara, I., Leino, A., Kalevo, L., Nikkonen, S., Gadoth, N., Kulkas, A., Myllymaa, S. and Leppanen, T. (2019). Differentiating Sleepy and non-sleepy obstructive sleep apnea patients using nocturnal pulse oximetry and deep learning. World Sleep Congress, Vancouver, Canada, 20-25 September 2019. Amsterdam, Netherlands: Elsevier . doi: 10.1016/j.sleep.2019.11.508
2019
Journal Article
Contrast enhanced computed tomography for real-time quantification of glycosaminoglycans in cartilage tissue engineered constructs
Garcia, João P., Longoni, Alessia, Gawlitta, Debby, J.W.P. Rosenberg, Antoine, Grinstaff, Mark W., Töyräs, Juha, Weinans, Harrie, Creemers, Laura B. and Pouran, Behdad (2019). Contrast enhanced computed tomography for real-time quantification of glycosaminoglycans in cartilage tissue engineered constructs. Acta Biomaterialia, 100, 202-212. doi: 10.1016/j.actbio.2019.09.014
2019
Conference Publication
Artificial neural network analysis of blood oxygen saturation signal enables accurate automatic screening of sleep apnea
Nikkonen, S., Afara, I., Myllymaa, S., Toyras, J. and Leppanen, T. (2019). Artificial neural network analysis of blood oxygen saturation signal enables accurate automatic screening of sleep apnea. World Sleep Congress, Vancouver, Canada, 20-25 September 2019. Amsterdam, Netherlands: Elsevier . doi: 10.1016/j.sleep.2019.11.624
2019
Conference Publication
Deep learning enables accurate sleep staging based on a single frontal EEG channel
Korkalainen, H., Aakko, J., Nikkonen, S., Kainulainen, S., Leino, A., Duce, B., Afara, I. O., Myllymaa, S., Toyras, J. and Leppanen, T. (2019). Deep learning enables accurate sleep staging based on a single frontal EEG channel. 15th World Sleep Congress, World Sleep 2019, Vancouver, Canada, 20-25 September, 2019 . Amsterdam, Netherlands: Elsevier BV.
2019
Journal Article
Effects of body mass on microstructural features of the osteochondral unit: A comparative analysis of 37 mammalian species
Mancini, I. A.D., Rieppo, L., Pouran, B., Afara, I. O., Braganca, F.M. Serra, van Rijen, M. H.P., Kik, M., Weinans, H., Toyras, J., van Weeren, P. R. and Malda, J. (2019). Effects of body mass on microstructural features of the osteochondral unit: A comparative analysis of 37 mammalian species. Bone, 127, 664-673. doi: 10.1016/j.bone.2019.07.001
2019
Journal Article
Triple contrast CT method enables simultaneous evaluation of articular cartilage composition and segmentation
Honkanen, Miitu K. M., Saukko, Annina E. A., Turunen, Mikael J., Xu, Wujun, Lovric, Goran, Honkanen, Juuso T. J., Grinstaff, Mark W., Lehto, Vesa-Pekka and Töyräs, Juha (2019). Triple contrast CT method enables simultaneous evaluation of articular cartilage composition and segmentation. Annals of Biomedical Engineering, 48 (2), 556-567. doi: 10.1007/s10439-019-02362-6
2019
Journal Article
Synchrotron MicroCT reveals the potential of the dual contrast technique for quantitative assessment of human articular cartilage composition
Honkanen, Miitu K. M., Saukko, Annina E. A., Turunen, Mikael J., Shaikh, Rubina, Prakash, Mithilesh, Lovric, Goran, Joukainen, Antti, Kroger, Heikki, Grinstaff, Mark W. and Toyras, Juha (2019). Synchrotron MicroCT reveals the potential of the dual contrast technique for quantitative assessment of human articular cartilage composition. Journal of Orthopaedic Research, 38 (3) jor.24479, 563-573. doi: 10.1002/jor.24479
2019
Journal Article
Artificial neural network analysis of the oxygen saturation signal enables accurate diagnostics of sleep apnea
Nikkonen, Sami, Afara, Isaac O., Leppänen, Timo and Töyräs, Juha (2019). Artificial neural network analysis of the oxygen saturation signal enables accurate diagnostics of sleep apnea. Scientific Reports, 9 (1) 13200, 13200. doi: 10.1038/s41598-019-49330-7
2019
Journal Article
Dataset on equine cartilage near infrared spectra, composition, and functional properties
Sarin, Jaakko K., Torniainen, Jari, Prakash, Mithilesh, Rieppo, Lassi, Afara, Isaac O. and Toyras, Juha (2019). Dataset on equine cartilage near infrared spectra, composition, and functional properties. Scientific Data, 6 (1) 164, 164. doi: 10.1038/s41597-019-0170y
Supervision
Availability
- Professor Juha Toyras is:
- Available for supervision
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Supervision history
Current supervision
-
Doctor Philosophy
Understanding the Interaction of light with biological tissues: a computational modelling approach
Associate Advisor
-
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
Obstructive sleep apnoea pathophysiology phenotypes: associations with sleepiness and vigilance
Associate Advisor
Other advisors: Dr Dwayne Mann, Associate Professor Philip Terrill
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Doctor Philosophy
Delirium in hospital. Challenging times call for digital measures.
Associate Advisor
Other advisors: Dr Peter Worthy, Professor Nadeeka Dissanayaka
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Doctor Philosophy
Deep Learning Methods Towards Reliable and Physiology-Aligned Sleep Scoring
Associate Advisor
Other advisors: Dr Shakes Chandra, Associate Professor Philip Terrill
Completed supervision
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2025
Doctor Philosophy
Raman spectroscopy for diagnostic tissue assessment
Associate Advisor
Other advisors: Dr Jari Torniainen, Professor Aleksandar Rakic
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2024
Doctor Philosophy
Integrating Wearable Devices into the Patient-Centred Digital Healthcare Environment
Associate Advisor
Other advisors: Associate Professor Chelsea Dobbins
Media
Enquiries
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