World's Best Scientists 2026 revealed!
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Engineering and Technology
Finland
2026

D-Index & Metrics

Engineering and Technology

D-Index
62
Citations
12629
World Ranking
1930
National Ranking
9

Research.com Recognitions

  • 2026 - Research.com Engineering and Technology in Finland Leader Award
  • 2025 - Research.com Engineering and Technology in Finland Leader Award

Overview

Juha Töyräs is affiliated with Kuopio University Hospital in Finland and has contributed extensively to the field of medical research, with a primary focus on medicine. Their scientific work spans several subfields, including physiology, rheumatology, biomedical engineering, surgery, and radiology, nuclear medicine, and imaging.

Their research topics cover a broad range of areas, with notable attention to obstructive sleep apnea research, osteoarthritis treatment and mechanisms, neuroscience of respiration and sleep, sleep and wakefulness research, infrared thermography in medicine, spectroscopy techniques in biomedical and chemical research, and veterinary equine medical research.

Among recent papers authored or co-authored by Töyräs are:

  • The Influence of Wearables on Health Care Outcomes in Chronic Disease, 2022, Journal of Medical Internet Research
  • Deep learning enables sleep staging from photoplethysmogram for patients with suspected sleep apnea, 2020, SLEEP
  • Open-source python module for automated preprocessing of near infrared spectroscopic data, 2020, Analytica Chimica Acta
  • Characterization of connective tissues using near-infrared spectroscopy and imaging, 2021, Nature Protocols
  • Effect of Sweating on Electrode-Skin Contact Impedances and Artifacts in EEG Recordings With Various Screen-Printed Ag/Agcl Electrodes, 2020, IEEE Access

Töyräs collaborates frequently with several other researchers, including Timo Leppänen, Isaac O. Afara, Samu Kainulainen, Henri Korkalainen, and Sami Myllymaa, indicating active engagement in collaborative research projects.

The scientist's work is published in journals that include:

  • Annals of Biomedical Engineering
  • Journal of Sleep Research
  • Journal of Orthopaedic Research®
  • Osteoarthritis and Cartilage
  • SLEEP

Best Publications

  • T2 relaxation reveals spatial collagen architecture in articular cartilage: a comparative quantitative MRI and polarized light microscopic study.

    Miika T. Nieminen;Jarno Rieppo;Juha Töyräs;Juhana M. Hakumäki

  • Comparison of the equilibrium response of articular cartilage in unconfined compression, confined compression and indentation

    R.K Korhonen;M.S Laasanen;J Töyräs;J Rieppo

  • Fibril reinforced poroelastic model predicts specifically mechanical behavior of normal, proteoglycan depleted and collagen degraded articular cartilage.

    Rami K Korhonen;Mikko S Laasanen;Juha Töyräs;Reijo Lappalainen

  • Quantitative MR microscopy of enzymatically degraded articular cartilage.

    Miika T. Nieminen;Juha Töyräs;Jarno Rieppo;Juhana M. Hakumäki

  • Biomechanical properties of knee articular cartilage.

    M S Laasanen;J Töyräs;R K Korhonen;J Rieppo

  • Proteoglycan and collagen sensitive MRI evaluation of normal and degenerated articular cartilage.

    M. J. Nissi;J. Töyräs;M. S. Laasanen;J. Rieppo

  • Characterization of enzymatically induced degradation of articular cartilage using high frequency ultrasound

    J Töyräs;J Rieppo;M T Nieminen;H J Helminen

  • Spatial assessment of articular cartilage proteoglycans with Gd‐DTPA‐enhanced T1 imaging

    Miika T. Nieminen;Jarno Rieppo;Johanna Silvennoinen;Juha Töyräs

  • Collagen network primarily controls Poisson's ratio of bovine articular cartilage in compression

    Panu Kiviranta;Jarno Rieppo;Rami K. Korhonen;Rami K. Korhonen;Petro Julkunen

  • Prediction of biomechanical properties of articular cartilage with quantitative magnetic resonance imaging

    Miika T. Nieminen;Juha Töyräs;Mikko S. Laasanen;Johanna Silvennoinen

  • Estimation of the Young's modulus of articular cartilage using an arthroscopic indentation instrument and ultrasonic measurement of tissue thickness.

    J Töyräs;T Lyyra-Laitinen;M Niinimäki;R Lindgren

  • Novel mechano-acoustic technique and instrument for diagnosis of cartilage degeneration.

    M S Laasanen;J Töyräs;J Hirvonen;S Saarakkala

  • Speed of sound in normal and degenerated bovine articular cartilage.

    Juha Töyräs;Mikko S Laasanen;Simo Saarakkala;Mikko J Lammi

  • Accurate Deep Learning-Based Sleep Staging in a Clinical Population With Suspected Obstructive Sleep Apnea

    Henri Korkalainen;Juhani Aakko;Sami Nikkonen;Samu Kainulainen

  • Deformation of articular cartilage during static loading of a knee joint – Experimental and finite element analysis

    K.S. Halonen;M.E. Mononen;J.S. Jurvelin;J. Töyräs

  • Novel parameters indicate significant differences in severity of obstructive sleep apnea with patients having similar apnea–hypopnea index

    Antti Kulkas;Pekka Tiihonen;Petro Julkunen;Esa Mervaala

  • T2 relaxation time mapping reveals age- and species-related diversity of collagen network architecture in articular cartilage

    M.J. Nissi;J. Rieppo;J. Töyräs;M.S. Laasanen

  • Ultrasonic quantitation of superficial degradation of articular cartilage

    Simo Saarakkala;Juha Töyräs;Jani Hirvonen;Mikko S. Laasanen

  • Real-time ultrasound analysis of articular cartilage degradation in vitro.

    Heikki J Nieminen;Juha Töyräs;Jarno Rieppo;Miika T Nieminen

  • 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.

    K S Halonen;M E Mononen;J S Jurvelin;J Töyräs

  • Bone mineral density, ultrasound velocity, and broadband attenuation predict mechanical properties of trabecular bone differently.

    J. Töyräs;M.T. Nieminen;H. Kröger;J.S. Jurvelin

  • Indentation diagnostics of cartilage degeneration

    P. Kiviranta;E. Lammentausta;J. Töyräs;I. Kiviranta

  • Estimation of mechanical properties of articular cartilage with MRI – dGEMRIC, T2 and T1 imaging in different species with variable stages of maturation

    M.J. Nissi;J. Rieppo;J. Töyräs;M.S. Laasanen

  • Ultrasonic characterization of human trabecular bone microstructure.

    Mikko A Hakulinen;Judd S Day;Juha Töyräs;Harrie Weinans

  • Prediction of density and mechanical properties of human trabecular bone in vitro by using ultrasound transmission and backscattering measurements at 0.2-6.7 MHz frequency range.

    Mikko A Hakulinen;Judd S Day;Juha Töyräs;Matti Timonen

  • Contrast agent enhanced pQCT of articular cartilage.

    Antti Kallioniemi;Jukka Jurvelin;Miika Nieminen;Mikko Lammi

Frequent Co-Authors

Jukka S. Jurvelin
Jukka S. Jurvelin University of Eastern Finland
Simo Saarakkala
Simo Saarakkala University of Oulu
Rami K. Korhonen
Rami K. Korhonen University of Eastern Finland
Esa Mervaala
Esa Mervaala University of Eastern Finland
Heikki Kröger
Heikki Kröger University of Eastern Finland
Mikko J. Lammi
Mikko J. Lammi Umeå University
Petro Julkunen
Petro Julkunen University of Eastern Finland
Harrie Weinans
Harrie Weinans Utrecht University
Mark W. Grinstaff
Mark W. Grinstaff Boston University
Jos Malda
Jos Malda Utrecht University

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