
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
2013
Journal Article
Novel parameters reflect changes in morphology of respiratory events during weight loss
Kulkas, A., Leppänen, T., Sahlman, J., Tiihonen, P., Mervaala, E., Kokkarinen, J., Randell, J., Seppä, J., Tuomilehto, H. and Töyräs, J. (2013). Novel parameters reflect changes in morphology of respiratory events during weight loss. Physiological Measurement, 34 (9), 1013-1026. doi: 10.1088/0967-3334/34/9/1013
2013
Journal Article
Mortality in middle-aged men with obstructive sleep apnea in Finland
Muraja-Murro, A., Eskola, K., Kolari, T., Tiihonen, P., Hukkanen, T., Tuomilehto, H., Peltonen, M., Mervaala, E. and Töyräs, J. (2013). Mortality in middle-aged men with obstructive sleep apnea in Finland. Sleep and Breathing, 17 (3), 1047-1053. doi: 10.1007/s11325-012-0798-8
2013
Journal Article
Arthroscopic ultrasound technique for simultaneous quantitative assessment of articular cartilage and subchondral bone: an in vitro and in vivo feasibility study
Liukkonen, J., Hirvasniemi, J., Joukainen, A., Penttilä, P., Virén, T., Saarakkala, S., Kröger, H., Jurvelin, J. S. and Töyräs, J. (2013). Arthroscopic ultrasound technique for simultaneous quantitative assessment of articular cartilage and subchondral bone: an in vitro and in vivo feasibility study. Ultrasound in Medicine and Biology, 39 (8), 1460-1468. doi: 10.1016/j.ultrasmedbio.2013.03.026
2013
Journal Article
Novel parameters indicate significant differences in severity of obstructive sleep apnea with patients having similar apnea-hypopnea index
Kulkas, Antti, Tiihonen, Pekka, Julkunen, Petro, Mervaala, Esa and Töyräs, Juha (2013). Novel parameters indicate significant differences in severity of obstructive sleep apnea with patients having similar apnea-hypopnea index. Medical and Biological Engineering and Computing, 51 (6), 697-708. doi: 10.1007/s11517-013-1039-4
2013
Journal Article
New disposable forehead electrode set with excellent signal quality and imaging compatibility
Myllymaa, Sami, Lepola, Pasi, Töyräs, Juha, Hukkanen, Taina, Mervaala, Esa, Lappalainen, Reijo and Myllymaa, Katja (2013). New disposable forehead electrode set with excellent signal quality and imaging compatibility. Journal of Neuroscience Methods, 215 (1), 103-109. doi: 10.1016/j.jneumeth.2013.02.003
2013
Journal Article
Importance of depth-wise distribution of collagen and proteoglycans in articular cartilage - a 3D finite element study of stresses and strains in human knee joint
Halonen, K. S., Mononen, M. E., Jurvelin, J. S., Töyräs, J. and Korhonen, R. K. (2013). Importance of depth-wise distribution of collagen and proteoglycans in articular cartilage - a 3D finite element study of stresses and strains in human knee joint. Journal of Biomechanics, 46 (6), 1184-1192. doi: 10.1016/j.jbiomech.2012.12.025
2013
Journal Article
Longitudinal elastic properties and porosity of cortical bone tissue vary with age in human proximal femur
Malo, M. K. H., Rohrbach, D., Isaksson, H., Töyräs, J., Jurvelin, J. S., Tamminen, I. S., Kröger, H. and Raum, K. (2013). Longitudinal elastic properties and porosity of cortical bone tissue vary with age in human proximal femur. Bone, 53 (2), 451-458. doi: 10.1016/j.bone.2013.01.015
2013
Journal Article
Repair of osteochondral defects with recombinant human type II collagen gel and autologous chondrocytes in rabbit
Pulkkinen, H. J., Tiitu, V., Valonen, P., Jurvelin, J. S., Rieppo, L., Töyräs, J., Silvast, T. S., Lammi, M. J. and Kiviranta, I. (2013). Repair of osteochondral defects with recombinant human type II collagen gel and autologous chondrocytes in rabbit. Osteoarthritis and Cartilage, 21 (3), 481-490. doi: 10.1016/j.joca.2012.12.004
2013
Journal Article
In vivo comparison of delayed gadolinium-enhanced MRI of cartilage and delayed quantitative CT arthrography in imaging of articular cartilage
Hirvasniemi, J., Kulmala, K. A M, Lammentausta, E., Ojala, R., Lehenkari, P., Kamel, A., Jurvelin, J. S., Töyräs, J., Nieminen, M. T. and Saarakkala, S. (2013). In vivo comparison of delayed gadolinium-enhanced MRI of cartilage and delayed quantitative CT arthrography in imaging of articular cartilage. Osteoarthritis and Cartilage, 21 (3), 434-442. doi: 10.1016/j.joca.2012.12.009
2013
Journal Article
Novel parameters for evaluating severity of sleep disordered breathing and for supporting diagnosis of sleep apnea-hypopnea syndrome
Kulkas, A., Tiihonen, P., Eskola, K., Julkunen, P., Mervaala, E. and Töyräs, J. (2013). Novel parameters for evaluating severity of sleep disordered breathing and for supporting diagnosis of sleep apnea-hypopnea syndrome. Journal of Medical Engineering and Technology, 37 (2), 135-143. doi: 10.3109/03091902.2012.754509
2013
Conference Publication
Desaturation delay, parameter for evaluating severity of sleep disordered breathing
Kulkas, A., Tiihonen, P., Julkunen, P., Mervaala, E. and Töyräs, J. (2013). Desaturation delay, parameter for evaluating severity of sleep disordered breathing. World Congress on Medical Physics and Biomedical Engineering, Beijing, China, 2 -31 May 2012. Heidelberg, Germany: Springer. doi: 10.1007/978-3-642-29305-4_90
2013
Journal Article
Bath concentration of anionic contrast agents does not affect their diffusion and distribution in articular cartilage in vitro
Silvast, Tuomo S., Jurvelin, Jukka S., Tiitu, Virpi, Quinn, Thomas M. and Töyräs, Juha (2013). Bath concentration of anionic contrast agents does not affect their diffusion and distribution in articular cartilage in vitro. Cartilage, 4 (1), 42-51. doi: 10.1177/1947603512451023
2013
Conference Publication
Novel screen printed electrode set for routine EEG recordings in patients with altered mental status
Myllymaa, Sami, Lepola, Pasi, Hukkanen, Taina, Oun, Andre, Mervaala, Esa, Toyras, Juha, Lappalainen, Reijo and Myllymaa, Katja (2013). Novel screen printed electrode set for routine EEG recordings in patients with altered mental status. 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2013, Osaka, Japan, 3-7 July 2013. Piscataway, NJ, United States: Institute of Electrical and Electronics Engineers. doi: 10.1109/EMBC.2013.6611099
2012
Journal Article
Total duration of apnea and hypopnea events and average desaturation show significant variation in patients with a similar apneahypopnea index
Muraja-Murro, A., Nurkkala, J., Tiihonen, P., Hukkanen, T., Tuomilehto, H., Kokkarinen, J., Mervaala, E. and Töyräs, J. (2012). Total duration of apnea and hypopnea events and average desaturation show significant variation in patients with a similar apneahypopnea index. Journal of Medical Engineering and Technology, 36 (8), 393-398. doi: 10.3109/03091902.2012.712201
2012
Journal Article
Delayed computed tomography arthrography of human knee cartilage in vivo
Kokkonen, Harri T., Aula, Antti S., Kröger, Heikki, Suomalainen, Juha-Sampo, Lammentausta, Eveliina, Mervaala, Esa, Jurvelin, Jukka S. and Töyräs, Juha (2012). Delayed computed tomography arthrography of human knee cartilage in vivo. Cartilage, 3 (4), 334-341. doi: 10.1177/1947603512447300
2012
Journal Article
Nondestructive fluorescence-based quantification of threose-induced collagen cross-linking in bovine articular cartilage
Kinnunen, Jussi, Kokkonen, Harri T., Kovanen, Vuokko, Hauta-Kasari, Markku, Vahimaa, Pasi, Lammi, Mikko J., Töyräs, Juha and Jurvelin, Jukka S. (2012). Nondestructive fluorescence-based quantification of threose-induced collagen cross-linking in bovine articular cartilage. Journal of Biomedical Optics, 17 (9) 097003. doi: 10.1117/1.JBO.17.9.097003
2012
Journal Article
Contrast-Enhanced Micro-Computed Tomography in Evaluation of Spontaneous Repair of Equine Cartilage
Kulmala, Katariina A.M., Pulkkinen, H. J., Rieppo, L., Tiitu, V., Kiviranta, I., Brünott, A., Brommer, H., van Weeren, R., Brama, P. A.J., Mikkola, M. T., Korhonen, R. K., Jurvelin, J. S. and Töyräs, J. (2012). Contrast-Enhanced Micro-Computed Tomography in Evaluation of Spontaneous Repair of Equine Cartilage. Cartilage, 3 (3), 235-244. doi: 10.1177/1947603511424173
2012
Journal Article
Ultrasonic evaluation of acute impact injury of articular cartilage in vitro
Virén, T., Timonen, M., Tyrväinen, H., Tiitu, V., Jurvelin, J. S. and Töyräs, J. (2012). Ultrasonic evaluation of acute impact injury of articular cartilage in vitro. Osteoarthritis and Cartilage, 20 (7), 719-726. doi: 10.1016/j.joca.2012.03.018
2012
Journal Article
Multi-site bone ultrasound measurements in elderly women with and without previous hip fractures
Karjalainen, J. P., Riekkinen, O., Töyräs, J., Hakulinen, M., Kröger, H., Rikkonen, T., Salovaara, K. and Jurvelin, J. S. (2012). Multi-site bone ultrasound measurements in elderly women with and without previous hip fractures. Osteoporosis International, 23 (4), 1287-1295. doi: 10.1007/s00198-011-1682-2
2012
Journal Article
Comparison of ultrasound and optical coherence tomography techniques for evaluation of integrity of spontaneously repaired horse cartilage
Virén, T., Huang, Y. P., Saarakkala, S., Pulkkinen, H., Tiitu, V., Linjama, A., Kiviranta, I., Lammi, M. J., Brnott, A., Brommer, H., Van Weeren, R., Brama, P. A.J., Zheng, Y. P., Jurvelin, J. S. and Töyrs, J. (2012). Comparison of ultrasound and optical coherence tomography techniques for evaluation of integrity of spontaneously repaired horse cartilage. Journal of Medical Engineering and Technology, 36 (3), 185-192. doi: 10.3109/03091902.2012.663054
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
-
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
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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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