
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
Journal Article
Detailed assessment of sleep architecture with deep learning and shorter epoch-to-epoch duration reveals sleep fragmentation of patients with obstructive sleep apnea
Korkalainen, Henri, Leppanen, Timo, Duce, Brett, Kainulainen, Samu, Aakko, Juhani, Leino, Akseli, Kalevo, Laura, Afara, Isaac O, Myllymaa, Sami and Toyras, Juha (2020). Detailed assessment of sleep architecture with deep learning and shorter epoch-to-epoch duration reveals sleep fragmentation of patients with obstructive sleep apnea. IEEE Journal of Biomedical and Health Informatics, PP (7) 9288902, 1-8. doi: 10.1109/JBHI.2020.3043507
2020
Journal Article
Longer apneas and hypopneas are associated with greater ultra-short-term HRV in obstructive sleep apnea
Hietakoste, Salla, Korkalainen, Henri, Kainulainen, Samu, Sillanmäki, Saara, Nikkonen, Sami, Myllymaa, Sami, Duce, Brett, Töyräs, Juha and Leppänen, Timo (2020). Longer apneas and hypopneas are associated with greater ultra-short-term HRV in obstructive sleep apnea. Scientific Reports, 10 (1) 21556, 21556. doi: 10.1038/s41598-020-77780-x
2020
Journal Article
Rapid CT-based estimation of articular cartilage biomechanics in the knee joint without cartilage segmentation
Mohammadi, Ali, Myller, Katariina A. H., Tanska, Petri, Hirvasniemi, Jukka, Saarakkala, Simo, Töyräs, Juha, Korhonen, Rami K. and Mononen, Mika E. (2020). Rapid CT-based estimation of articular cartilage biomechanics in the knee joint without cartilage segmentation. Annals of Biomedical Engineering, 48 (12), 2965-2975. doi: 10.1007/s10439-020-02666-y
2020
Journal Article
Tissue optical properties combined with machine learning enables estimation of articular cartilage composition and functional integrity
Kafian-Attari, Iman, Nippolainen, Ervin, Semenov, Dmitry, Hauta-Kasari, Markku, Töyräs, Juha and Afara, Isaac O. (2020). Tissue optical properties combined with machine learning enables estimation of articular cartilage composition and functional integrity. Biomedical Optics Express, 11 (11), 6480-6494. doi: 10.1364/BOE.402929
2020
Journal Article
Tailored synthesis of PEGylated bismuth nanoparticles for x-ray computed tomography and photothermal therapy: one-pot, targeted pyrolysis, and self-promotion
Xu, Wujun, Cui, Pang, Happonen, Emilia, Leppänen, Jukka, Liu, Lizhi, Rantanen, Jimi, Majda, Dorota, Saukko, Annina, Thapa, Rinez, Nissinen, Tuomo, Tynkkynen, Tuulia, Töyräs, Juha, Fan, Li, Liu, Wenchao and Lehto, Vesa-Pekka (2020). Tailored synthesis of PEGylated bismuth nanoparticles for x-ray computed tomography and photothermal therapy: one-pot, targeted pyrolysis, and self-promotion. ACS Applied Materials and Interfaces, 12 (42), 47233-47244. doi: 10.1021/acsami.0c12499
2020
Journal Article
Increased nocturnal arterial pulsation frequencies of obstructive sleep apnoea patients is associated with an increased number of lapses in a psychomotor vigilance task
Kainulainen, Samu, Duce, Brett, Korkalainen, Henri, Leino, Akseli, Huttunen, Riku, Kalevo, Laura, Arnardottir, Erna S, Kulkas, Antti, Myllymaa, Sami, Töyräs, Juha and Leppänen, Timo (2020). Increased nocturnal arterial pulsation frequencies of obstructive sleep apnoea patients is associated with an increased number of lapses in a psychomotor vigilance task. ERJ Open Research, 6 (4) 00277-2020, 1-13. doi: 10.1183/23120541.00277-2020
2020
Journal Article
Power spectral densities of nocturnal pulse oximetry signals differ in OSA patients with and without daytime sleepiness
Kainulainen, Samu, Töyräs, Juha, Oksenberg, Arie, Korkalainen, Henri, Afara, Isaac O., Leino, Akseli, Kalevo, Laura, Nikkonen, Sami, Gadoth, Natan, Kulkas, Antti, Myllymaa, Sami and Leppänen, Timo (2020). Power spectral densities of nocturnal pulse oximetry signals differ in OSA patients with and without daytime sleepiness. Sleep Medicine, 73, 231-237. doi: 10.1016/j.sleep.2020.07.015
2020
Journal Article
Effects of human articular cartilage constituents on simultaneous diffusion of cationic and nonionic contrast agents
Bhattarai, Abhisek, Mäkelä, Janne T. A., Pouran, Behdad, Kröger, Heikki, Weinans, Harrie, Grinstaff, Mark W., Töyräs, Juha and Turunen, Mikael J. (2020). Effects of human articular cartilage constituents on simultaneous diffusion of cationic and nonionic contrast agents. Journal of Orthopaedic Research, 39 (4) jor.24824, 771-779. doi: 10.1002/jor.24824
2020
Journal Article
Quantification of myocardial blood flow by machine learning analysis of modified dual bolus MRI examination
Husso, Minna, Afara, Isaac O., Nissi, Mikko J., Kuivanen, Antti, Halonen, Paavo, Tarkia, Miikka, Teuho, Jarmo, Saunavaara, Virva, Vainio, Pauli, Sipola, Petri, Manninen, Hannu, Ylä-Herttuala, Seppo, Knuuti, Juhani and Töyräs, Juha (2020). Quantification of myocardial blood flow by machine learning analysis of modified dual bolus MRI examination. Annals of Biomedical Engineering, 49 (2), 653-662. doi: 10.1007/s10439-020-02591-0
2020
Journal Article
Near-infrared spectroscopy for mapping of human meniscus biochemical constituents
Ala-Myllymäki, Juho, Paakkonen, Tommi, Joukainen, Antti, Kröger, Heikki, Lehenkari, Petri, Töyräs, Juha and Afara, Isaac O. (2020). Near-infrared spectroscopy for mapping of human meniscus biochemical constituents. Annals of Biomedical Engineering, 49 (1), 469-476. doi: 10.1007/s10439-020-02578-x
2020
Journal Article
Accurate deep learning-based sleep staging in a clinical population with suspected obstructive sleep apnea
Korkalainen, Henri, Leppanen, Timo, Aakko, Juhani, Nikkonen, Sami, Kainulainen, Samu, Leino, Akseli, Duce, Brett, Afara, Isaac Oluwaseun, Myllymaa, Sami and Toyras, Juha (2020). Accurate deep learning-based sleep staging in a clinical population with suspected obstructive sleep apnea. IEEE Journal of Biomedical and Health Informatics, 24 (7) 8936942, 2073-2081. doi: 10.1109/JBHI.2019.2951346
2020
Journal Article
Comparison of the effect of weight change, simulated computational continuous positive airway pressure treatment and positional therapy on severity of sleep apnea
Kulkas, Antti, Duce, Brett, Töyräs, Juha, Seppä, Juha and Leppänen, Timo (2020). Comparison of the effect of weight change, simulated computational continuous positive airway pressure treatment and positional therapy on severity of sleep apnea. Journal of Sleep Research, 30 (2) e13070, e13070. doi: 10.1111/jsr.13070
2020
Journal Article
Bright ultrashort echo time SWIFT MRI signal at the osteochondral junction is not located in the calcified cartilage
Nykänen, Olli, Leskinen, Henri P. P., Finnilä, Mikko A. J., Karhula, Sakari S., Turunen, Mikael J., Töyräs, Juha, Saarakkala, Simo and Nissi, Mikko J. (2020). Bright ultrashort echo time SWIFT MRI signal at the osteochondral junction is not located in the calcified cartilage. Journal of Orthopaedic Research, 38 (12) jor.24777, 2649-2656. doi: 10.1002/jor.24777
2020
Journal Article
Evaluation of articular cartilage with quantitative MRI in an equine model of post-traumatic osteoarthritis
Kajabi, Abdul Wahed, Casula, Victor, Sarin, Jaakko K., Ketola, Juuso H., Nykänen, Olli, te Moller, Nikae C. R., Mancini, Irina A. D., Visser, Jetze, Brommer, Harold, René van Weeren, P., Malda, Jos, Töyräs, Juha, Nieminen, Miika T. and Nissi, Mikko J. (2020). Evaluation of articular cartilage with quantitative MRI in an equine model of post-traumatic osteoarthritis. Journal of Orthopaedic Research, 39 (1) jor.24780, 63-73. doi: 10.1002/jor.24780
2020
Journal Article
Dual contrast in computed tomography allows earlier characterization of articular cartilage over single contrast
Bhattarai, Abhisek, Pouran, Behdad, Mäkelä, Janne T. A., Shaikh, Rubina, Honkanen, Miitu K. M., Prakash, Mithilesh, Kröger, Heikki, Grinstaff, Mark W., Weinans, Harrie, Jurvelin, Jukka S. and Töyräs, Juha (2020). Dual contrast in computed tomography allows earlier characterization of articular cartilage over single contrast. Journal of Orthopaedic Research, 38 (10) jor.24774, 2230-2238. doi: 10.1002/jor.24774
2020
Journal Article
Estimating daytime sleepiness with previous night EEG, EOG and EMG spectrograms in patients with suspected sleep apnea using a convolutional neural network
Nikkonen, Sami, Korkalainen, Henri, Kainulainen, Samu, Myllymaa, Sami, Leino, Akseli, Kalevo, Laura, Oksenberg, Arie, Leppänen, Timo and Töyräs, Juha (2020). Estimating daytime sleepiness with previous night EEG, EOG and EMG spectrograms in patients with suspected sleep apnea using a convolutional neural network. Sleep, 43 (12) zsaa106. doi: 10.1093/sleep/zsaa106
2020
Journal Article
Deep learning enables sleep staging from photoplethysmogram for patients with suspected sleep apnea
Korkalainen, Henri, Aakko, Juhani, Duce, Brett, Kainulainen, Samu, Leino, Akseli, Nikkonen, Sami, Afara, Isaac O., Myllymaa, Sami, Töyräs, Juha and Leppänen, Timo (2020). Deep learning enables sleep staging from photoplethysmogram for patients with suspected sleep apnea. Sleep, 43 (11) zsaa098. doi: 10.1093/sleep/zsaa098
2020
Journal Article
Clinical contrast-enhanced computed tomography with semiautomatic segmentation provides feasible input for computational models of the knee joint
Myller, Katariina Anna Henriikka, Korhonen, Rami, Töyräs, Juha, Tanska, Petri, Väänänen, Sami, Jurvelin, Jukka S, Saarakkala, Simo and Mononen, Mika E (2020). Clinical contrast-enhanced computed tomography with semiautomatic segmentation provides feasible input for computational models of the knee joint. Journal of Biomechanical Engineering, 142 (5) 051001. doi: 10.1115/1.4045279
2020
Journal Article
Open-source python module for automated preprocessing of near infrared spectroscopic data
Torniainen, Jari, Afara, Isaac O., Prakash, Mithilesh, Sarin, Jaakko K., Stenroth, Lauri and Töyräs, Juha (2020). Open-source python module for automated preprocessing of near infrared spectroscopic data. Analytica Chimica Acta, 1108, 1-9. doi: 10.1016/j.aca.2020.02.030
2020
Journal Article
Polysomnographic characteristics of severe obstructive sleep apnea vary significantly between hypertensive and normotensive patients of both genders
Leppanen, T., Kulkas, A., Toyras, J., Myllymaa, S., Gadoth, N. and Oksenberg, A. (2020). Polysomnographic characteristics of severe obstructive sleep apnea vary significantly between hypertensive and normotensive patients of both genders. Sleep and Breathing, 25 (1), 105-116. doi: 10.1007/s11325-020-02047-8
Supervision
Availability
- Professor Juha Toyras is:
- Available for supervision
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Supervision history
Current supervision
-
Doctor Philosophy
Artifical intelligence approaches for diagnosing and phenotyping sleep disorders
Associate Advisor
Other advisors: Dr Shakes Chandra, Associate Professor Philip Terrill
-
Doctor Philosophy
Delirium in hospital. Challenging times call for digital measures.
Associate Advisor
Other advisors: Dr Peter Worthy, Professor Nadeeka Dissanayaka
-
Doctor Philosophy
Deep Learning Methods Towards Reliable and Physiology-Aligned Sleep Scoring
Associate Advisor
Other advisors: Dr Shakes Chandra, Associate Professor Philip Terrill
-
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
Understanding the Interaction of light with biological tissues: a computational modelling approach
Associate Advisor
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
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