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

Publications

2 of 8

Progression of Amyloid Accumulation in Late Adulthood Among People With Childhood-Onset Epilepsy (2025)
- Neurology
Joutsa, Juho; Rinne, Juha O.; Niemi, Kalle J.; Karrasch, Mira; Parkkola, Riitta K.; Saunavaara, Jani; Helin, Semi P.; Hermann, Bruce P.; Sillanpää, Matti
(A1 Refereed original research article in a scientific journal)
Striatal cue-reactivity and neurotransmitter function in gambling disorder (2025)
- Journal of behavioral addictions
Bellmunt-Gil, Albert; Majuri, Joonas; Nummenmaa, Lauri; Helin, Semi; Forsback, Sarita; Rajander, Johan; Kaasinen, Valtteri; Joutsa, Juho
(A1 Refereed original research article in a scientific journal)
Aberrant type 2 dopamine receptor availability in violent offenders with psychopathy (2024)
- NeuroImage
Lukkarinen, Lasse; Tuisku, Jouni; Sun, Lihua; Helin, Semi; Karlsson, Henry K.; Venetjoki, Niina; Salomaa, Marja; Rautio, Päivi; Hirvonen, Jussi; Lauerma, Hannu; Tiihonen, Jari; Nummenmaa, Lauri

(A1 Refereed original research article in a scientific journal)
Blood biomarkers of neurodegeneration associate differently with amyloid deposition, medial temporal atrophy, and cerebrovascular changes in APOE ε4-enriched cognitively unimpaired elderly (2024)
- Alzheimer's Research and Therapy
Koivumäki, Mikko; Ekblad, Laura; Lantero-Rodriguez, Juan; Ashton, Nicholas J.; Karikari, Thomas K.; Helin, Semi; Parkkola, Riitta; Lötjönen, Jyrki; Zetterberg, Henrik; Blennow, Kaj; Rinne, Juha O.; Snellman, Anniina
(A1 Refereed original research article in a scientific journal)
Cognitively healthy APOE4/4 carriers show white matter impairment associated with serum NfL and amyloid-PET (2024)
- Neurobiology of Disease
Tato-Fernández, Claudia; Ekblad, Laura L.; Pietilä, Elina; Saunavaara, Virva; Helin, Semi; Parkkola, Riitta; Zetterberg, Henrik; Blennow, Kaj; Rinne, Juha O.; Snellman, Anniina
(A1 Refereed original research article in a scientific journal)
In-target production of [11C]CH4 from a nitrogen/hydrogen gas target as a function of beam current, irradiation time, and target temperature (2024)
- EJNMMI Radiopharmacy and Chemistry
Helin, Semi; Rajander, Johan; Aromaa, Jussi; Arponen, Eveliina; Helin, Jatta S.; Solin, Olof
(A1 Refereed original research article in a scientific journal)
Midlife insulin resistance, APOE genotype, and change in late-life brain beta-amyloid accumulation : A 5-year follow-up [11C]PIB-PET study (2024)
- Neurobiology of Disease
Pietilä, Elina; Snellman, Anniina; Tuisku, Jouni; Helin, Semi; Viitanen, Matti; Jula, Antti; Rinne, Juha O.; Ekblad, Laura L.
(A1 Refereed original research article in a scientific journal)
P2X 7-receptor binding in new-onset and secondary progressive MS – a [11C]SMW139 PET study (2024)
- EJNMMI Research
Lehto, Jussi; Aarnio, Richard; Tuisku, Jouni; Sucksdorff, Marcus; Koivumäki, Esa Mikko; Nylund, Marjo; Helin, Semi; Rajander, Johan; Danon, Jonathan; Gilchrist, Jayson; Kassiou, Michael; Oikonen, Vesa; Airas, Laura
(A1 Refereed original research article in a scientific journal)
[11C]carfentanil PET imaging for studying the peripheral opioid system in vivo: effect of photoperiod on mu-opioid receptor availability in brown adipose tissue (2023)
- European Journal of Nuclear Medicine and Molecular Imaging
Sun Lihua, Aarnio Richard, Herre Erika Atencio, Kärnä Salli, Palani Senthil, Virtanen Helena, Liljenbäck Heidi, Virta Jenni, Honkaniemi Aake, Oikonen Vesa, Han Chunlei, Laurila Sanna, Bucci Marco, Helin Semi, Yatkin Emrah, Nummenmaa Lauri, Nuutila Pirjo, Tang Jing, Roivainen Anne
(A1 Refereed original research article in a scientific journal)
Adenosine A2A receptor availability in patients with early- and moderate-stage Parkinson’s disease (2023)
- Journal of Neurology
Waggan Imran, Rissanen Eero, Tuisku Jouni, Joutsa Juho, Helin Semi, Parkkola Riitta, Rinne Juha O, Airas Laura
(A1 Refereed original research article in a scientific journal)