Timo Leppänen
Associate Professor
Co-head of the Sleep Technology and Analytics Research Group (STAR)
Department of Technical Physics, Faculty of Science, Forestry and Technology
timo.leppanen@uef.fi | +358 50 310 1828
I started my studies in the University of Eastern Finland in 2011 after two years in the service for the Finnish Defense Forces. I got my bachelor, master and doctoral degrees in five years in 2016 at the age of 26 years and my thesis earned a grade of approved with distinction (which is awarded only if dissertation falls in the category of top 5% of its field). Since then, I have been a co-head and principal investigator in the STAG, a research team focusing on sleep-related disorders and development of novel methods and computational tools for sleep data analysis. Furthermore, I have established a wide international collaboration network with world’s top-level scientists and research infrastructures as well as companies operating at business sector. My research is mainly funded by the the Academy of Finland (Postdoctoral Researcher), Business Finland (NordicPerMed project NordSleep) and private foundations.
My research is focused on development of novel diagnostic parameters, mathematical solutions, and paradigms for severity estimation of obstructive sleep apnea. Therefore, it is very closely related to medical physics but it has also strong interface with clinical medicine. Thus, my research is a great example of interdisciplinary research in University of Eastern Finland but also of active research collaboration between University of Eastern Finland and Kuopio University Hospital.
Research groups
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Publications
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Respiratory event index underestimates severity of sleep apnea compared to apnea-hypopnea index
Pitkänen, Minna; Nath, Rajdeep Kumar; Korkalainen, Henri; Nikkonen, Sami; Mahamid, Alaa; Oksenberg, Arie; Duce, Brett; Töyräs, Juha; Kainulainen, Samu; Leppänen, Timo. 2024. Sleep advances. 5: . zpad054 -
Variation in the Photoplethysmogram Response to Arousal From Sleep Depending on the Cause of Arousal and the Presence of Desaturation
Luukinen, Mieli; Pitkänen, Henna; Leppänen, Timo; Töyräs, Juha; Islind, Anna Sigridur; Kainulainen, Samu; Korkalainen, Henri. 2024. IEEE journal of translational engineering in health and medicine. 12: 328-339 -
Acute cardiorespiratory coupling impairment in worsening sleep apnea-related intermittent hypoxemia
Hietakoste, Salla; Armanac-Julian, Pablo; Karhu, Tuomas; Bailon, Raquel; Sillanmäki, Saara; Töyräs, Juha; Leppänen, Timo; Myllymaa, Sami; Kainulainen, Samu. 2023. IEEE transactions on biomedical engineering. 2024; 71: 326-333 -
CPAP therapy for obstructive sleep apnoea: persisting challenges in outcome assessment
McNicholas, Walter T; Arnardottir, Erna Sif; Leppänen, Timo; Schiza, Sophia; Randerath, Winfried. 2023. European respiratory journal. 62: -
Consumer sleep technology for the screening of obstructive sleep apnea and snoring: current status and a protocol for a systematic review and meta‐analysis of diagnostic test accuracy
Pires, Gabriel Natan; Arnardóttir, Erna Sif; Islind, Anna Sigridur; Leppänen, Timo; McNicholas, Walter T.. 2023. Journal of sleep research. 32: . e13819 -
Deep learning-based algorithm accurately classifies sleep stages in preadolescent children with sleep-disordered breathing symptoms and age-matched controls
Somaskandhan, Pranavan; Leppänen, Timo; Terrill, Philip I; Sigurdardottir, Sigridur; Arnardottir, Erna Sif; Ólafsdóttir, Kristín A; Serwatko, Marta; Sigurðardóttir, Sigurveig Þ; Clausen, Michael; Töyräs, Juha; Korkalainen, Henri. 2023. Frontiers in neurology. 14: . 1162998 -
Generalizable Deep Learning-based Sleep Staging Approach for Ambulatory Textile Electrode Headband Recordings
Rusanen, Matias; Huttunen, Riku; Korkalainen, Henri; Myllymaa, Sami; Toyras, Juha; Myllymaa, Katja; Sigurdardottir, Sigridur; Olafsdottir, Kristin Anna; Leppanen, Timo; Arnardottir, Erna Sif; Kainulainen, Samu. 2023. IEEE journal of biomedical and health informatics. 27: 1869-1880 -
Joint use of a low thermal resolution thermal camera and an RGB camera for respiration measurement
Khan, Zaeed; Rusanen, Matias; Arvonen, Miika; Leppanen, Timo; Särkkä, Simo. 2023. IEEE transactions on instrumentation and measurement. 2024; 73: . 5003314 -
Multicentre sleep-stage scoring agreement in the Sleep Revolution project
Nikkonen, Sami; Somaskandhan, Pranavan; Korkalainen, Henri; Kainulainen, Samu; Terrill, Philip I; Gretarsdottir, Heidur; Sigurdardottir, Sigridur; Olafsdottir, Kristin Anna; Islind, Anna Sigridur; oskarsdottir, Maria; Arnardottir, Erna Sif; Leppänen, Timo. 2023. Journal of sleep research. [Epub ahead of print 13 June 2023]: -
Multi‐centre arousal scoring agreement in the Sleep Revolution
Pitkänen, Henna; Nikkonen, Sami; Rissanen, Marika; Islind, Anna Sigridur; Gretarsdottir, Heidur; Arnardottir, Erna Sif; Leppänen, Timo; Korkalainen, Henri. 2023. Journal of sleep research. [Epub ahead of print 26 Dec 2023]: . e14127