User profiles for Juha Töyräs
 | Professor, Chief Physicist Juha Töyräs, PhDThe University of Queensland, University of Eastern Finland, Kuopio University Hospital Verified email at uq.edu.au Cited by 14410 |
T2 relaxation reveals spatial collagen architecture in articular cartilage: A comparative quantitative MRI and polarized light microscopic study
MT Nieminen, J Rieppo, J Töyräs… - … in Medicine: An …, 2001 - Wiley Online Library
It has been suggested that orientational changes in the collagen network of articular
cartilage account for the depthwise T 2 anisotropy of MRI through the magic angle effect. To …
cartilage account for the depthwise T 2 anisotropy of MRI through the magic angle effect. To …
Fibril reinforced poroelastic model predicts specifically mechanical behavior of normal, proteoglycan depleted and collagen degraded articular cartilage
RK Korhonen, MS Laasanen, J Töyräs… - Journal of …, 2003 - Elsevier
Degradation of collagen network and proteoglycan (PG) macromolecules are signs of articular
cartilage degeneration. These changes impair cartilage mechanical function. Effects of …
cartilage degeneration. These changes impair cartilage mechanical function. Effects of …
Quantitative MR microscopy of enzymatically degraded articular cartilage
MT Nieminen, J Töyräs, J Rieppo… - … in Medicine: An …, 2000 - Wiley Online Library
Structural changes in bovine patellar articular cartilage, induced by component selective
enzymatic treatments, were investigated by measuring tissue T 2 relaxation at 9.4 T. This MRI …
enzymatic treatments, were investigated by measuring tissue T 2 relaxation at 9.4 T. This MRI …
Collagen network primarily controls Poisson's ratio of bovine articular cartilage in compression
The equilibrium Young's modulus of articular cartilage is known to be primarily determined
by proteoglycans (PGs). However, the relation between the Poisson's ratio and the …
by proteoglycans (PGs). However, the relation between the Poisson's ratio and the …
Spatial assessment of articular cartilage proteoglycans with Gd‐DTPA‐enhanced T1 imaging
…, J Rieppo, J Silvennoinen, J Töyräs… - … in Medicine: An …, 2002 - Wiley Online Library
In Gd‐DTPA‐enhanced T 1 imaging of articular cartilage, the MRI contrast agent with two
negative charges is understood to accumulate in tissue inversely to the negative charge of …
negative charges is understood to accumulate in tissue inversely to the negative charge of …
Prediction of biomechanical properties of articular cartilage with quantitative magnetic resonance imaging
MT Nieminen, J Töyräs, MS Laasanen… - Journal of …, 2004 - Elsevier
Quantitative magnetic resonance imaging (MRI) is the most potential non-invasive means
for revealing the structure, composition and pathology of articular cartilage. Here we …
for revealing the structure, composition and pathology of articular cartilage. Here we …
Deep learning enables sleep staging from photoplethysmogram for patients with suspected sleep apnea
Study Objectives Accurate identification of sleep stages is essential in the diagnosis of
sleep disorders (eg obstructive sleep apnea [OSA]) but relies on labor-intensive …
sleep disorders (eg obstructive sleep apnea [OSA]) but relies on labor-intensive …
Structure-function relationships in enzymatically modified articular cartilage
J Rieppo, J Töyräs, MT Nieminen, V Kovanen… - Cells Tissues …, 2003 - karger.com
The present study is aimed at revealing structure-function relationships of bovine patellar
articular cartilage. Collagenase, chondroitinase ABC and elastase were used for controlled …
articular cartilage. Collagenase, chondroitinase ABC and elastase were used for controlled …
Accurate deep learning-based sleep staging in a clinical population with suspected obstructive sleep apnea
The identification of sleep stages is essential in the diagnostics of sleep disorders, among
which obstructive sleep apnea (OSA) is one of the most prevalent. However, manual scoring …
which obstructive sleep apnea (OSA) is one of the most prevalent. However, manual scoring …
Novel parameters indicate significant differences in severity of obstructive sleep apnea with patients having similar apnea–hypopnea index
…, P Tiihonen, P Julkunen, E Mervaala, J Töyräs - Medical & biological …, 2013 - Springer
Sleep apnea–hypopnea syndrome (SAHS) causes impairment of daytime functions and
increases risk of cardiovascular diseases. Apnea–hypopnea index (AHI), currently used for the …
increases risk of cardiovascular diseases. Apnea–hypopnea index (AHI), currently used for the …