PhD Riku Klén - UTU Research Portal

Riku Klén
PhD

- Associate Professor,
Turku PET Centre (Independent units)

riku.klen@utu.fi

Kiinamyllynkatu 4-8

Turku

ORCID identifier: https://orcid.org/0000-0002-0982-8360

http://users.utu.fi/ripekl/

Areas of expertise

Medical imaging, imaging instrumentation, machine learning, longitudinal analysis, geometric function theory, hyperbolic type geometries, quasiconformal mappings

Publications

4 of 7

A Respiratory Motion Estimation Method Based on Inertial Measurement Units for Gated Positron Emission Tomography (2021)
- Sensors
Lehtonen Eero, Teuho Jarmo, Koskinen Juho, Jafari Tadi Mojtaba, Klén Riku, Siekkinen Reetta, Gambin Joaquin R., Vasankari Tuija, Saraste Antti
(A1 Refereed original research article in a scientific journal)
Comparison of 12 Machine Learning Methods for Polar Map Classification in Cardiac Perfusion PET (2021)
- IEEE Nuclear Science Symposium and Medical Imaging Conference record
2021 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2021 and 28th International Symposium on Room-Temperature Semiconductor Detectors, RTSD 2022 Teuho Jarmo, Schultz Jussi, Klén Riku, Saraste Antti, Ono Naoaki, Kanaya Shigehiko
(A4 Refereed article in a conference publication )
Crowdsourcing digital health measures to predict Parkinson's disease severity: the Parkinson's Disease Digital Biomarker DREAM Challenge (2021)
- npj Digital Medicine
Sieberts SolveigK, Schaff Jennifer, Duda Marlena, Pataki Bálint Ármin, Sun Ming, Snyder Phil, Daneault Jean-Francois, Parisi Federico, Costante Gianluca, Rubin Udi, Banda Peter, Chae Yoree, Neto Elias Chaibub, Dorsey E Ray, Aydin Zafer, Chen Aipeng, Elo Laura L, Espino Carlos, Glaab Enrico, Goan Ethan, Golabchi Fatemeh Noushin, Görmez Yasin, Jaakkola Maria K, Jonnagaddala Jitendra, Klén Riku, Li Dongmei, McDaniel Christian, Perrin Dimitri, Perumal Thanneer M, Rad Nastaran Mohammadian, Rainaldi Erin, Sapienza Stefano, Schwab Patrick, Shokhirev Nikolai, Venäläinen Mikko S, Vergara-Diaz Gloria, Zhang Yuqian, Wang Yuanjian, Guan Yuanfang, Brunner Daniela, Bonato Paolo, Mangravite Lara M, Omberg Larsson; the Parkinson's Disease Digital Biomarker Challenge Consortium
(A1 Refereed original research article in a scientific journal)
Improving patient identification for advanced cardiac imaging through machine learning-integration of clinical and coronary CT angiography data (2021)
- International Journal of Cardiology
Benjamins Jan Walter, Yeung Ming Wai, Maaniitty Teemu, Saraste Antti, Klén Riku, van der Harst Pim, Knuuti Juhani, Juarez-Orozco Luis Eduardo
(A1 Refereed original research article in a scientific journal)
Learning to Denoise Gated Cardiac PET Images Using Convolutional Neural Networks (2021)
- IEEE Access
Rives Gambin Joaquin, Jafari Tadi Mojtaba, Teuho Jarmo, Klén Riku, Knuuti Juhani, Koskinen Juho, Saraste Antti, Lehtonen Eero
(A1 Refereed original research article in a scientific journal)
Preoperative Risk Prediction Models for Short-Term Revision and Death After Total Hip Arthroplasty : Data from the Finnish Arthroplasty Register (2021)
- JB & JS open access
Venäläinen Mikko S, Panula Valtteri J, Klén Riku, Haapakoski Jaason J, Eskelinen Antti P, Manninen Mikko J, Kettunen Jukka S, Puhto Ari-Pekka, Vasara Anna I, Mäkelä Keijo T, Elo Laura L.
(A1 Refereed original research article in a scientific journal)
Ptolemy constant and uniformity (2021)
- Publicationes Mathematicae Debrecen
Harmaala Eero, Klen Riku
(A1 Refereed original research article in a scientific journal)
Riskilaskurimallit tyypillisimmille lyhyen aikavälin komplikaatioille sekä kuolemalle ensivaiheen lonkan kokotekonivelleikkauksen jälkeen perustuen Suomen Endoproteesirekisterin tietokantaan (2021)
- Suomen ortopedia ja traumatologia
Venäläinen Mikko, Panula Valtteri, Klén Riku, Haapakoski Jaason, Eskelinen Antti, Manninen Mikko, Kettunen Jukka, Puhto Ari-Pekka, Vasara Anna, Mäkelä Keijo, Elo Laura
(D1 Article in a professional journal)
Secretin activates brown fat and induces satiation (2021)
- Nature Metabolism
Laurila Sanna, Sun Lihua, Lahesmaa Minna, Schnabl Katharina, Laitinen Kirsi, Klén Riku, Li Yongguo, Balaz Miroslav, Wolfrum Christian, Steiger Katja, Niemi Tarja, Taittonen Markku, U-Din Mueez, Välikangas Tommi, Elo Laura L, Eskola Olli, Kirjavainen Anna K, Nummenmaa Lauri, Virtanen Kirsi A, Klingenspor Martin, Nuutila Pirjo
(A1 Refereed original research article in a scientific journal)
Stable Iterative Variable Selection (2021)
- Bioinformatics
Mahmoudian Mehrad, Venäläinen Mikko S, Klén Riku, Elo Laura L
(A1 Refereed original research article in a scientific journal)
Validation of Automated PET Segmentation Methods Based on Connected Components for Myocardium (2021)
- IEEE Nuclear Science Symposium and Medical Imaging Conference record
2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Siekkinen Reetta, Lehtonen Eero, Teuho Jarmo, Jafari Tadi Mojtaba, Koskinen Juho, Klén Riku
(A4 Refereed article in a conference publication )
Assessment of MRI-Based Attenuation Correction for MRI-Only Radiotherapy Treatment Planning of the Brain (2020)
- Diagnostics
Iiro Ranta, Jarmo Teuho, Jani Linden, Riku Klén, Mika Teräs, Mika Kapanen, Jani Keyriläinen
(A1 Refereed original research article in a scientific journal)
Conformally Invariant Metrics and Quasiconformal Mappings (2020) Parisa Hariri, Riku Klén, Matti Vuorinen
(C1 Refereed scientific book)
Easy-to-use tool for evaluating the elevated acute kidney injury risk against reduced cardiovascular disease risk during intensive blood pressure control (2020)
- Journal of Hypertension
Venäläinen Mikko S, Klén Riku, Mahmoudian Mehrad, Raitakari Olli T, Elo Laura L
(A1 Refereed original research article in a scientific journal)
Estimation of optimal number of gates in dual gated F-18-FDG cardiac PET (2020)
- Scientific Reports
Klen R, Teuho J, Noponen T, Thielemans K, Hoppela E, Lehtonen E, Sipilä HT, Teräs M, Knuuti J
(A1 Refereed original research article in a scientific journal)
Evaluation of image quality with four positron emitters and three preclinical PET/CT systems (2020)
- EJNMMI Research
Teuho J, Riehakainen L, Honkaniemi A, Moisio O, Han CL, Tirri M, Liu SH, Grönroos TJ, Liu J, Wan L, Liang X, Ling YQ, Hua YX, Roivainen A, Knuuti J, Xie QG, Teräs M, D'Ascenzo N, Klen R,
(A1 Refereed original research article in a scientific journal)
Likelihood contrasts: a machine learning algorithm for binary classification of longitudinal data (2020)
- Scientific Reports
Riku Klén, Markku Karhunen, Laura L. Elo
(A1 Refereed original research article in a scientific journal)
Magnetic Resonance-Based Attenuation Correction and Scatter Correction in Neurological Positron Emission Tomography/Magnetic Resonance Imaging—Current Status With Emerging Applications (2020)
- Frontiers in Physics
Teuho J, Torrado-Carvajal A, Herzog H, Anazodo U, Klén R, Iida H, Teräs M
(A2 Refereed review article in a scientific journal )
Posterior approach, fracture diagnosis, and American Society of Anesthesiology class III-IV are associated with increased risk of revision for dislocation after total hip arthroplasty: An analysis of 33,337 operations from the Finnish Arthroplasty Register (2020)
- Scandinavian Journal of Surgery
V. J. Panula , E. M. Ekman , M. S. Venäläinen, I. Laaksonen, R. Klén, J. J. Haapakoski, A. P. Eskelinen, L. L. Elo, Keijo T. Mäkelä
(A1 Refereed original research article in a scientific journal)
Predicting Skeletal Muscle and Whole-Body Insulin Sensitivity Using NMR-Metabolomic Profiling (2020)
- Journal of the Endocrine Society
Klén R, Honka MJ, Hannukainen JC, Huovinen V, Bucci M, Latva-Rasku A, Venäläinen MS, Kalliokoski KK, Virtanen KA, Lautamäki R, Iozzo P, Elo LL, Nuutila P
(A1 Refereed original research article in a scientific journal)