I am working on my doctoral thesis at the University of Oulu. I have a degree in biomedical engineering, and I focus on multidimensional signal analysis in neuroimaging research.
Currently I am solving technical challenges on assessment of brain clearance by measuring cardiovascular pulse propagation in human brain. My latest findings show that pulsations are altered in Alzheimer's disease, matching latest discoveries about the glymphatic system in animal research.
Rajna Z, Mattila H, Huotari N, Tuovinen T, Krüger J, Holst SC, Korhonen V, Remes AM, Seppänen T, Hennig J, Nedergaard M, and Kiviniemi V (2021). Cardiovascular brain impulses in Alzheimer’s disease. Brain (in review)
Rajna Z, Nyrönen P, Kiviniemi V, and Seppänen T (2020). Lossy compression should also be used in functional MRI research. 8th EMBEC 2020, IFMBE Proceedings 80:774-783, DOI:10.1007/978-3-030-64610-3_87
Rajna Z, Raitamaa L, Tuovinen T, Heikkilä J, Kiviniemi V, and Seppänen T (2019). 3D Multi-Resolution Optical Flow Analysis of Cardiovascular Pulse Propagation in Human Brain. IEEE Transactions on Medical Imaging 38(9):2028-36. DOI: 10.1109/TMI.2019.2904762.
Rajna Z, Kananen J, Keskinarkaus A, Seppänen T, and Kiviniemi V (2015). Detection of short-term activity avalanches in human brain default mode network with ultrafast MR encephalography. Frontiers in Human Neuroscience 9:448. DOI: 10.3389/fnhum.2015.00448.
Rajna Z, Keskinarkaus A, Kiviniemi V, and Seppänen T (2015). Speeding up the file access of large compressed NIfTI neuroimaging data. Engineering in Medicine and Biology Society (EMBC), 37th Annual International Conference of the IEEE, 25-29 Aug. 2015, 654-657. DOI: 10.1109/embc.2015.7318447.
Last updated: 18.1.2021