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

7 of 7

Inclusion relations of hyperbolic type metric balls (2012)
- Publicationes Mathematicae Debrecen
Klen R, Vuorinen M
(A1 Refereed original research article in a scientific journal)
Apollonian circles and hyperbolic geometry (2011)
- Journal of Analysis
Riku Klén, Matti Vuorinen
(A1 Refereed original research article in a scientific journal)
Coronary plaque imaging in patients with unstable angina pectoris using dual gated [18F]-FDG PET/CT (2011)
- European Heart Journal Supplements
Lankinen E, Saraste A, Noponen T, Klen R, Teras M, Kokki T, Kajander S, Pietila M, Ukkonen H, Knuuti J
(Other publication)
CLOSE-TO-CONVEXITY OF QUASIHYPERBOLIC AND j-METRIC BALLS (2010)
- Annales Academiae Scientiarum Fennicae. Mathematica
Klén Riku
(A1 Refereed original research article in a scientific journal)
Dual gated PET/CT imaging of small targets of the heart: Method description and testing with a dynamic heart phantom2010
- Journal of Nuclear Cardiology
Kokki T, Sipila HT, Teras M, Noponen T, Durand-Schaefer N, Klen R, Knuuti J
(A1 Refereed original research article in a scientific journal)
On Jordan Type Inequalities for Hyperbolic Functions (2010)
- Journal of Inequalities and Applications
Klen R, Visuri M, Vuorinen M
(A1 Refereed original research article in a scientific journal)
Quasihyperbolic Geometry in Euclidean and Banach Spaces (2010)
- Journal of Analysis
Klén Riku, Rasila Antti, Talponen Jarno
(A1 Refereed original research article in a scientific journal)
On hyperbolic type metrics (2009) Klén Riku
(G4 Monograph dissertation)
Local convexity properties of j-metric balls2008
- Annales Academiae Scientiarum Fennicae. Mathematica
Klen R
(A1 Refereed original research article in a scientific journal)
(2008)
- Journal of Mathematical Analysis and Applications
Klen R
(A1 Refereed original research article in a scientific journal)