Semi Helin - UTU Research Portal - UTU Research Portal

Semi Helin

- Doctoral Researcher,
Imaging and Clinical Diagnostics (Department of Clinical Medicine)
- Senior Researcher,
Turku PET Centre (Independent units)

semhel@utu.fi

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Automated GMP production and long-term experience in radiosynthesis of the SV2A tracer [11C]UCB-J (2026)
- EJNMMI Radiopharmacy and Chemistry
Wahlroos, Saara; Krzyczmonik, Anna; Helin, Semi; Rajander, Johan; Solin, Olof; Kirjavainen, Anna K.
Connectivity-guided transcranial magnetic stimulation of the dopamine system: A proof-of-concept study (2026)
- Brain Stimulation
Eklund, Mikael; Eldaief, Mark C.; Tuominen, Lauri; Niemi, Kalle J.; Aaltonen, Juho; Saunavaara, Virva; Hirvonen, Jussi; Helin, Semi; Sander, Christin Y.; Rosen, Bruce; Pascual-Leone, Alvaro; Fox, Michael D.; Nummenmaa, Aapo; Joutsa, Juho
Midlife insulin resistance and brain beta-amyloid accumulation as predictors of change in late-life cognitive function – A 20-year follow-up study (2026)
- Neurobiology of Aging
Pietilä, Elina; Karrasch, Mira; Helin, Semi; Snellman, Anniina; Viitanen, Matti; Jula, Antti; Rinne, Juha O.; Ekblad, Laura L.
Aberrant type 2 dopamine and mu-opioid receptor availability in autism spectrum disorder (2025)
- European Journal of Nuclear Medicine and Molecular Imaging
Noppari, Tuomo; Tuisku, Jouni; Lukkarinen, Lasse; Tani, Pekka; Lindberg, Nina; Saure, Emma; Lauerma, Hannu; Tiihonen, Jari; Hirvonen, Jussi; Helin, Semi; Rajander, Johan; Salmi, Juha; Nummenmaa, Lauri
Anorexia nervosa is associated with higher brain mu-opioid receptor availability (2025)
- Molecular Psychiatry
Pak, Kyoungjune; Tuisku, Jouni; Karlsson, Henry K.; Hirvonen, Jussi; Rebelos, Eleni; Pekkarinen, Laura; Sun, Lihua; Latva-Rasku, Aino; Helin, Semi; Rajander, Johan; Karukivi, Max; Nuutila, Pirjo; Nummenmaa, Lauri
APOE4 carriership status influences [11C]PiB white matter retention in cognitively healthy older adults (2025)
- Neurobiology of Disease
Tato-Fernández Claudia; Ekblad Laura L.; Bucci Marco; Tuisku Jouni; Parkkola Riitta; Helin Semi; Rinne Juha O.; Snellman Anniina
Cannabidiol modulates brain molecular alterations, gut microbiota dysbiosis and alcohol self-administration in a mouse model of fetal alcohol spectrum disorder (2025)
- Biomedicine and Pharmacotherapy
Navarrete F.; Cabrera-Rubio R.; Gasparyan A.; Aarnio R.; López-Picón F.; Helin S.; Rajander J.; Collado M.C.; Manzanares J.
Endogenous opioid system modulates proximal and distal threat signals in the human brain (2025)
- Molecular Psychiatry
Seppälä, Kerttu; Putkinen, Vesa; Harju, Harri; Rebelos, Eleni; Hirvonen, Jussi; Helin, Semi; Rajander, Johan; Karlsson, Henry K.; Saunavaara, Jani; Hyönä, Jukka; Nummenmaa, Lauri
Lapsuusiän epilepsia saattaa altistaa myöhäisiän muistisairaudelle = Progression of amyloid accumulation in late adulthood among people with childhood-onset epilepsy (2025)
- Duodecim
Joutsa, Juho; Rinne, Juha O.; Niemi, Kalle J.; Karrasch, Mira; Parkkola, Riitta K.; Saunavaara, Jani; Helin, Semi; Hermann, Bruce B.; Sillanpää, Matti
Neuroinflammation in Parkinson’s disease : A study with [11C]PBR28 PET and cerebrospinal fluid markers (2025)
- Parkinsonism and Related Disorders
Al-Abdulrasul, H.; Ajalin, R.; Tuisku, J.; Zetterberg, H.; Blennow, K.; Vahlberg, T.; Ekblad, L.; Helin, S.; Forsback, S.; Rinne, J.O.; Brück, A.