Tanja Tarvainen appointed as Professor of Computational Imaging and Modelling
January 21st 2021
Tanja Tarvainen was appointed as a Professor of Computational Imaging and Modelling in the beginning of 2021. Imaging and modelling are part of inverse problems research that is the field of Professor Tarvainen. She is especially interested in Bayesian inverse problems, quantitative imaging, uncertainty quantification with applications in optical, ultrasonic and hybrid imaging. For more news: https://www.uef.fi/fi/artikkeli/tanja-tarvainen-laskennallisen-kuvantamisen-ja-mallinnuksen-professoriksi
More information: Professor Tanja Tarvainen, Department of Applied Physics, University of Eastern Finland, p. 040 355 2310, email. tanja.tarvainen(at)uef.fi
Associate Professor Tanja Tarvainen secures ERC Consolidator Grant
December 9th 2020
Associate Professor Tanja Tarvainen has been granted the European Research Council (ERC) Consolidator Grant for five years, with the funding amounting to 2 million euros. This is the first ERC Consolidator Grant awarded to a University of Eastern Finland researcher. The ERC grants are among the most esteemed European grants, making them highly competitive.
The grant was awarded for Associate Professor Tarvainen’s research aiming at developing novel quantitative imaging modalities based on coupled physics. Coupled physics imaging combines the benefits of two physical phenomena, such as light and ultrasound through the photoacoustic effect.
Antti Voss defended his PhD thesis
February 7th 2020
Antti Voss defended his doctoral dissertation “Imaging moisture flows in cement-based materials using electrical capacitance tomography” in a public examination at the University of Eastern Finland, Kuopio campus, on February 7th, 2020, at 12 o’clock (Snellmania auditorium SN200).
Matti Niskanen defended his PhD thesis
January 17th 2020
Matti Niskanen defended his doctoral dissertation “Bayesian inversion methods for acoustical characterisation of poroviscoelastic media” in a public examination at the University of Eastern Finland, Kuopio campus, on Januray 17th, 2020, at 12 o’clock (Snellmania auditorium SN201).
Jenni Tick defended her PhD thesis
December 20th 2019
Jenni Tick defends her doctoral dissertation “Image Reconstruction and Modelling of Uncertainties in Photoacoustic Tomography” in public examination in University of Eastern Finland, Kuopio campus, December 20th, 2019, 12 noon (Snellmania, SN200 Auditorium).
Jenni Tick awarded Finnish Inverse Problem Society prize
December 17th 2019
FM Jenni Tick was awarded the Finnish Inverse Prize for an excellent PhD thesis completed during 2019 at the annual Inverse Days conference in Jyväskylä, Finland. In her thesis “Image reconstruction and modelling of uncertainties in photoacoustic tomography” Jenni Tick approached photoacoustic tomography in a Bayesian framework, and formulated solutions for image reconstruction and uncertainty quantification of the inverse problem. Jenni Tick will publicly defend her thesis on December 20th in the University of Eastern Finland, Kuopio.
The Finnish Inverse Prize is awarded annually by the Finnish Inverse Problems society. The purpose of the prize is to recognize outstanding achievements in the field of inverse problems broadly defined, and to encourage future work in the field. The prize is most often awarded to a young researcher for an outstanding doctoral thesis in inverse problems.
People in the figure are: Jenni Tick and Samuli Siltanen (President of the Finnish Inverse Problems Society).
Finnish Summer School on Inverse Problems
May 29th 2019
The Finnish Centre of Excellence in Inverse Modelling and Imaging and Finnish Inverse Problems Society (FIPS) are organising a summer school on inverse problems on June 3-7, 2019 at the Kumpula Campus of University of Helsinki, Finland. The content is primarily intended for PhD students and postdoctoral researchers in mathematics or physics working in the field of inverse problems.
- Tatiana Bubba (University of Helsinki): X-ray tomography
- Janne Hakkarainen (Finnish Meteorological Institute): Kalman filter
- Ville Kolehmainen (University of Eastern Finland): Bayesian inversion and MCMC
- Marko Laine (Finnish Meteorological Institute): Markov Chain Monte Carlo (MCMC) methods
- Mikko Salo (University of Jyväskylä): Applications of microlocal analysis to inverse problems
- Hanne Kekkonen (University of Cambridge): TBA
- Matti Lassas (University of Helsinki): Geometric inversion
- Aku Seppänen (University of Eastern Finland): TBA
- Samuli Siltanen (University of Helsinki): X-ray tomography
- Antti Solonen (Leanheat Oy, LUT University): Hierarchical Bayesian models for marine vessels
- Johanna Tamminen (Finnish Meteorological Institute): Satellite remote sensing
- Tanja Tarvainen (University of Eastern Finland): Tomographic imaging with light and sound
Finnish Workshop on Radiative Transfer – connections across disciplines
May 10th 2019
The first Finnish Workshop on Radiative Transfer was organised jointly by Finnish Meteorological Institute, University of Eastern Finland and University of Helsinki in Helsinki 6–7 May, 2019. National experts on computational modelling and theory of radiative transfer gathered together to present their research and exchange ideas on their work applied to the atmosphere, biomedical optics, vegetation, snow, and astronomical objects. The aim of the workshop was to connect Finnish researchers across scientific disciplines and to create a community for future collaboration in joint projects and enhanced researcher mobility.
“Advanced modelling framework and fast solutions are crucial in the quickly developing field of atmospheric remote sensing”, says Hannakaisa Lindqvist, organiser of the workshop at FMI-SPACE. “For example, new satellites produce increasing amounts of data that benefit from efficient algorithms,” Lindqvist describes the FMI interests in the workshop. Prof. Tanja Tarvainen, organiser of the workshop from the University of Eastern Finland, emphasizes the importance of collaboration: “We wanted to bring together radiative transfer researchers to advance collaboration and build networks especially for the young generation of researchers.” The workshop finished with a visit to the scattering laboratory at the University of Helsinki. “Measurements involving the scattering and absorption of light by complex media have tremendous value in giving the ground truth reference to our computational models,” concludes Antti Penttilä, workshop organiser from University of Helsinki.
Finnish Workshop on Radiative Transfer was attended by 23 invited participants from the Finnish Meteorological Institute, University of Helsinki, University of Eastern Finland, VTT, University of Oulu, and the Finnish Geospatial Research Institute. The next workshop will be arranged in spring 2020 at the University of Eastern Finland, Kuopio.
More information: Tanja Tarvainen, Associate Professor, tanja.tarvainen(at)uef.fi
An open source software to study light transport
March 14th 2019
An open source Monte Carlo software and MATLAB toolbox for light transport simulation was released by researchers of the University of Eastern Finland at the Department of Applied Physics. The software named ValoMC was developed by Aleksi Leino, Aki Pulkkinen and Tanja Tarvainen, and a related research article entitled “ValoMC: a Monte Carlo software and MATLAB toolbox for simulating light transport in biological tissue” was published in OSA Continuum. The software can be used to simulate light transport in a scattering medium such as biological tissue. Furthermore, it includes a MATLAB toolbox that can be used to analyse and visualise the simulations.
Research article: Leino AA, Pulkkinen A, Tarvainen T, ValoMC: a Monte Carlo software and MATLAB toolbox for simulating light transport in biological tissue, OSA Continuum 2(3):957-972 (2019).
For further information, please contact: Associate Professor Tanja Tarvainen, Department of Applied Physics, University of Eastern Finland, p. 040 355 2310, email. tanja.tarvainen(at)uef.fi
Article chosen as the latest Technical Area Pick for Biomedical Acoustics of the JASA
March 4th 2019
The Journal of the Acoustical Society of America (JASA) chose an article by Jenni Tick, Aki Pulkkinen, Jari Kaipio and Tanja Tarvainen from the Department of Applied Physics, University of Eastern as the latest Technical Area Pick for Biomedical Acoustics. The article entitled Three dimensional photoacoustic tomography in Bayesian framework was chosen among all the articles from the same technical field published in year 2018 in the Journal of the Acoustical Society of America. The article was co-authored by Felix Lucka from Centrum Wiskunde and Informatica (Amsterdam, the Netherlands) and Ben T. Cox, Robert Ellwood and Simon R. Arridge from the University College London (London, United Kingdom).
Further information: Associate Professor Tanja Tarvainen, Department of Applied Physics, University of Eastern Finland, p. 040 355 2310, email. tanja.tarvainen(at)uef.fi
Tick J, Pulkkinen A, Lucka F, Ellwood R, Cox BT, Kaipio JP, Arridge SR, Tarvainen T, Three dimensional photoacoustic tomography in Bayesian framework, The Journal of the Acoustical Society of America, 144(4):2061-2071 (2018).
Working days on design and characterisation of innovative noise reducing materials and structures
September 14th 2018
Working days on design and characterisation of innovative noise reducing materials and structures in Kuopio, October 9-10, 2018. Designs for Noise Reducing Materials and Structures (DENORMS) COST Action’s fourth Workshop “Working days on design and characterisation of innovative noise reducing materials and structures” will be held from 9th to 10th October 2018 in University of Eastern Finland, Kuopio campus.
Centre of Excellence of Inverse Modelling and Imaging
June 1st 2017
The Academy of Finland has selected 12 new Centres of Excellence (CoEs). The first stage of the call attracted a total of 179 letters of intent, and 34 applicants were invited to the second call stage to submit full applications. The operating period of the new CoEs is longer than before, eight years (2018–2025), which according to the Academy of Finland will further serve to support scientific risk-taking.
This is the third time the Centre of Excellence of Inverse Modelling and Imaging was selected to the CoE programme. The Centre of Excellence of Inverse Modelling and Imaging is coordinated by the University of Helsinki, and it comprises a large number of research groups in the field of inverse problems research from several Finnish universities.
UEF’s Inverse Problems Group is based at the Kuopio Campus, comprising four professors and some 20 researchers. Traditionally, UEF’s research group has been the largest one in the CoE. The UEF Inverse Problems Group is led by Professor Jari Kaipio.
Inverse problems research is a field of applied mathematics, which seeks to develop computational methods for medical tomography imaging, non-destructive testing, astronomy and environmental modelling. The UEF Inverse Problems Group focuses on modelling-related uncertainties in particular, as well as on applications in the fields of medicine and sufficiency of natural resources.
The research group is also strong in technology transfer, as the group’s researchers have established several companies, such as Numcore, Rocsole, Kuava and Ownsurround in the Kuopio region, and they have also won several national and international prizes.
For further information, please contact:
- Professor Jari Kaipio, tel. +358 40 503 3391, jari(at)math.auckland.ac.nz
- Professor Marko Vauhkonen, tel. +358 40 355 2112, marko.vauhkonen(at)uef.fi
- Academy of Finland’s press release
Funding for research on photoacoustic imaging from Jane and Aatos Erkko Foundation
June 10th 2016
Docent Tanja Tarvainen has been awarded a grant of 500 000 euros by Jane and Aatos Erkko Foundation for research on developing novel imaging methods based on light and ultrasound. Light and ultrasound are utilised in many medical examinations such as monitoring blood oxygenation level and pulse, and ultrasound (echo) imaging. In addition to these conventional methods, novel imaging modalities based on light and ultrasound are being developed. Photoacoustic tomography is an emerging imaging modality in which tomographic images are formed based on photoacoustic effect. The research team of Dr Tarvainen investigates mathematical modelling and image reconstruction of photoacoustic tomography with an aim at developing the method towards a quantitative imaging modality.
Further information: Senior Researcher Tanja Tarvainen, p. 040 355 2310, tanja.tarvainen(at)uef.fi
Danny Smyl awarded a Fulbright grant to Finland
March 18th 2016
Danny Smyl from North Carolina State University (NCSU), Raleigh, USA, was awarded a Fulbright U.S. Student Award to Finland from August 2016 to May 2017. The Fulbright funded visit will be hosted by the Inverse Problems group at the Department of Applied Physics, University of Eastern Finland (UEF). Mr. Smyl is currently conducting his PhD work under supervision of Prof. Mohammad Pour-Ghaz, NCSU, on non-destructive testing of concrete. The visit is part of the research collaboration between the research teams of Prof. Pour-Ghaz and Dr. Aku Seppänen, UEF.
Academy funding for a project on remote sensing
December 23th 2015
Docent Aku Seppänen has been awarded a grant of 177 000 euros by the Academy of Finland to launch a new research project “Four-dimensional Airborne Laser Scanning”. The project is part of a research consortium led by Associate Professor Petteri Packalen from the School of Forest Sciences, University of Eastern Finland. The grant was awarded from Academy’s ICT2023 programme (third thematic call “Methods and applications for management and analysis of big data and open data”) for years 2016-2017..
Further information: Academy Research Fellow Aku Seppänen
Dissertation: Dong Liu
December 12th 2015
Dong Liu defends his doctoral dissertation “Non-linear Difference Imaging Approach to Electrical Impedance Tomography” in public examination in University of Eastern Finland, Kuopio campus, December 12th, 2015, 12pm (Snellmania, SN201 Auditorium).
Dissertation: Meghdoot Mozumder
December 5th 2015
Meghdoot Mozumder defends his doctoral dissertation “Image reconstruction with error modelling in diffuse optical tomography” in public examination in University of Eastern Finland, Kuopio campus, December 5th, 2014, 12 noon (Snellmania, SN200 Auditorium).
Acoustic days 2015 in Kuopio, September 1st-2nd
August 21th 2015
Acoustic days 2015 is organized in Kuopio Music Center at September 1-2, 2015. The days are organized by The Acoustical Society of Finland.
A special issue in Inverse Problems
November 20th 2014
A special issue in the journal Inverse Problems on “Inverse Problems in the Bayesian Framework” was published in November 2014. The special issue was edited by Daniela Calvetti and Erkki Somersalo from Case Western Reserve University and Jari Kaipio from UEF.
Editorial in Journal of Nuclear Cardiology
June 17th 2015
A research article “Dependence of left ventricular functional parameters on image acquisition time in cardiac-gated myocardial perfusion SPECT” by Matti Kortelainen et. al. published in Journal of Nuclear Cardiology was reviewed in the Editorial of the journal. In their work, Kortelainen et. al. developed methods for respiratory motion correction in myocardial perfusion imaging using single-photon emission computed tomography (SPECT) and positron emission tomography (PET).
M. Kortelainen, T. Koivumäki, M. Vauhkonen, M. Hakulinen: “Dependence of left ventricular functional parameters on image acquisition time in cardiac-gated myocardial perfusion SPECT”
John O. Prior: “How much shorter is better? Investigating image acquisition time reduction on left ventricular phase analysis for cardiac dyssynchrony”, Editorial, Journal of Nuclear Cardiology , 2015.
New Academy Postdoctoral Researchers
April 29th 2015
Academy of Finland granted Postdoctoral Researcher posts to Christina Brandt and Aki Pulkkinen. Both projects will start in September 1, 2015. Christina Brandt received her PhD from the University of Bremen in 2012, and has worked as a Postdoctoral researcher in the University of Osnabrück, Germany, since 2013. The topic of her Academy postdoctoral project is “Approximation error modeling in large scale inverse problems in imaging”. Aki Pulkkinen defended his PhD thesis in the University of Eastern Finland in August 2014. He visited the Sunnybrook Research Institute in Toronto, Canada during 2008-2011, and continued his research in the Kuopio Inverse Problems group 2012-2014. The topic of his Academy postdoctoral project is “Quantitative treatment planning for transcranial focused ultrasound therapy”.
Highligths of 2014 in Inverse Problems Journal
February 24th 2015
An article by the Kuopio Inverse Problems Group was selected as highlights of 2014 in Inverse Problems Journal:
Estimating pipeline location using ground-penetrating radar data in the presence of model uncertainties. Timo Lähivaara, Nicholas F Dudley Ward, Tomi Huttunen, Jari P Kaipio and Kati Niinimäki, 2014, Inverse Problems, 30 114006, doi: 10.1088/0266-5611/30/11/114006
Acoustic days 2015 in Kuopio
February 23rd 2015
The Acoustical Society of Finland will organize Acoustic days in Kuopio, September 1-2, 2015.
Dissertation: Jari Kourunen
December 13th 2014
Jari Kourunen defends his doctoral dissertation “Imaging of mixing in selected industrial processes using electrical resistance tomography” in public examination in University of Eastern Finland, Kuopio campus, December 13th, 2014, 12pm (Snellmania, SN200 Auditorium).
“Seismic signals reveal groundwater reserves” interview in CSC
November 28th 2014
Timo Lähivaara was interviewed in CSC – IT Center For Science. Lähivaara has developed methods for mapping and monitoring groundwater reserves.
Dissertation: Ossi Lehtikangas
November 20th 2014
Ossi Lehtikangas defends his doctoral dissertation “Approximations and hybrid models for modeling light propagation in biological tissues” in public examination in University of Eastern Finland, Kuopio campus, November 29th, 2014, 12pm (Snellmania, SN200 Auditorium).
Dissertation: Aki Pulkkinen
July 11th 2014
Aki Pulkkinen defends his doctoral dissertation “Simulation Methods in Transcranial Ultrasound Therapy” in public examination in University of Eastern Finland, Kuopio campus, August 9th, 2014, 12pm (L21, Snellmania building).
‘Sensing skin’ quickly detects cracks, damage in concrete structures
July 10th 2014
The UEF Inverse problems group and the group of Prof. Mohammad Pour-Ghaz from North Carolina State University have recently developed a new ‘sensing skin’ technology for detecting cracks in concrete structures. The research has drawn a wide interest in public media; it has been reported e.g. by phys.org, NASA Tech Briefs, wn.com, Science Newsline, ScienceDaily, Durability+Design, materialstoday, theEngineer, World Industrial Reporter and Capitalista. In Finnish press, the research was noted e.g. by Aamulehti, Turun Sanomat, Maaseudun tulevaisuus and Yle.
M. Hallaji, A. Seppänen, M. Pour-Ghaz: Electrical impedance tomography-based sensing skin for quantitative imaging of damage in concrete, Smart Materials and Structures, 23: 085001, 2014.
Marko Vauhkonen appointed to the position of the professor in industrial physics and mathematics
June 1st 2014
Marko Vauhkonen, PhD, was appointed to the position of the professor in industrial physics and mathematics in the University of Eastern Finland. Prof. Vauhonen is the leader of the Mathematical Modelling group in the Department of Applied Physics.
Dissertation: Antti Lipponen
May 29th 2014
Antti Lipponen defends his doctoral dissertation “Nonstationary Flow Fields, Model Reduction and Approximation Errors in Process Tomography” in public examination in University of Eastern Finland, Kuopio campus, June 6th, 2014, 12pm (L21, Snellmania building).
Magnus Ehrnrooth Foundation Grant
March 6th 2014
Tanja Tarvainen was awarded a 60 000 € grant by Magnus Ehrnrooth Foundation for research on quantitative photoacoustic tomography. In the project, Tarvainen’s research team develops modelling and image reconstruction methods for quantitative photoacoustic tomography based on Bayesian approach for ill-posed inverse problems.
In 2014, Magnus Ehrnrooth Foundation awarded 202 grants amounting to 1 741 875 €. The grant received by Tanja Tarvainen was the largest grant awarded in 2014.
Insights article in Inverse Problems
February 28th 2014
An insights article Estimation of aquifer dimensions from passive seismic signals with approximate wave propagation models by T. Lähivaara, N. Dudley Ward, T. Huttunen, J. Koponen and J. Kaipio was published in Inverse Problems.
Kaipio et al. 2000 in Top 30 Cited Inverse Problems Papers
February 28th 2014
Inverse Problems is celebrating 30 years since the start of the journal’s regular publication in 1985. The journal has listed its top 30 cited articles. The article by Kaipio et al. 2000 is among those:
Jari P Kaipio, Ville Kolehmainen, Erkki Somersalo, Marko Vauhkonen: “Statistical inversion and Monte Carlo sampling methods in electrical impedance tomography”, Inverse Problems 16 1487 – 1522, doi:10.1088/0266-5611/16/5/321, 2000.
Kati Niinimäki awarded with Pertti Lindfors price
December 18th 2013
The Finnish Inverse Problems Society awarded Kati Niinimäki, Ph.D. with Pertti Lindfors prize for her work and achievements in the field of computational optimization methods for large-scale inverse problems. The award was granted to Kati Niinimäki in the annual Inverse Days in Inari, in December 12th, 2013.
Dissertation: Anna Kaasinen
October 25th 2013
Anna Kaasinen defends her doctoral dissertation “Optimal Control in Process Tomography” in public examination in University of Eastern Finland, Kuopio campus, October 29th, 2013, 12pm (L21, Snellmania building).
Dissertation: Teemu Luostari
October 21th 2013
Teemu Luostari defends his doctoral dissertation “Non-polynomial approximation methods in acoustics and elasticity” in public examination in University of Eastern Finland, Kuopio campus, October 25th, 2013, 12pm (ML3, Medistudia building).
Dissertation: Kimmo Karhunen
September 27th 2013
Kimmo Karhunen defends his doctoral dissertation “Electrical Resistance Tomography Imaging of Concrete” in public examination in University of Eastern Finland, Kuopio campus, October 3rd, 2013 (ML1, Medistudia building).
Insights article in Inverse Problems
June 19th 2013
An insights article Quantitative photoacoustic tomography using the radiative transfer equation by T. Saratoon, T. Tarvainen, B.T. Cox and S.R. Arridge was published in Inverse Problems.
Dissertation: Kati Niinimäki
June 2nd 2013
Kati Niinimäki defends her doctoral dissertation “Computational optimization methods for large-scale inverse problems” in public examination in University of Eastern Finland, Kuopio campus, June 12th, 2013 (L22, Snellmania building).
Anssi Lehikoinen selected as the Young Researcher Entrepreneur of 2013
May 23th 2013
Anssi Lehikoinen, PhD, was selected as the Young researcher Entrepreneur of the Year 2013. This is a new entrepreneurial award which purpose is to acknowledge researches who have developed business from research. The award was granted by the Federation of Finnish Enterprises and the Special Fund for Academic Entrepreneurship of KAUTE Foundation. Lehikoinen is the CEO of Rocsole Ltd and he defended his doctoral dissertation “Modeling Uncertainties in Process Tomography and Hydrogeophysics” succesfully in November 2012. The recipients of the Young Researcher Entrepreneur Award were announced on 20 May in Turku, Finland.
Aku Seppänen appointed as Academy Research Fellow
May 8th 2013
Aku Seppänen, PhD, was appointed as an Academy Research Fellow by the Research Council for Natural Sciences and Engineering of the Academy of Finland at May 8th 2013. In his research Aku Seppänen develops advanced modelling and inversion method for non-destructive material testing using various techniques which include e.g. electrical impedance tomography.
Anssi Lehikoinen selected as a promising young researcher in UEF
March 29th 2013
Anssi Lehikoinen, PhD, was selected as a promising young researcher in the Faculty of Science and Forestry in University of Eastern Finland by Rector Perttu Vartiainen and Academic Rector Jukka Mönkkönen. The award is presented in recognition of an outstanding doctoral dissertation completed at the end of the early stage researcher career phase. Lehikoinen defended his PhD thesis “Modeling Uncertainties in Process Tomography and Hydrogeophysics” succesfully in November 2012. The recipients of the Young Researcher Award were announced during the university’s anniversary celebration held on 21 March.
Highligths of 2012 in Inverse Problems Journal
March 28th 2013
Two articles by the Kuopio Inverse Problems Group were selected as highlights of 2012 in Inverse Problems Journal:
Sparsity-promoting Bayesian inversion V Kolehmainen, M Lassas, K Niinimäki and S Siltanen, 2012, Inverse Problems, 28, 025005, doi: 10.1088/0266-5611/28/2/025005
Reconstructing absorption and scattering distributions in quantitative photoacoustic tomography T Tarvainen, B T Cox, J P Kaipio and S R Arridge, 2012, Inverse Problems 28, 084009, doi: 10.1088/0266-5611/28/8/084009
Read also an Insights of the authors -article Recovering hidden sparse signals using Bayes’ formula by V Kolehmainen, M Lassas, K Niinimäki and S Siltanen.