Research

My research focuses on emergency radiology, AI applications in medical imaging, and neuroradiology. I collaborate with the neuroimaging and AI research group at the University of Turku and Turku University Hospital. You can also find my work on Google Scholar.

Publications

2026

Elo, A., Vierula, J.-P., Heikkinen, J., Nurminen, J., Happonen, T., Nyman, M., Velhonoja, J., Irjala, H., Soukka, T., Mattila, K., Arponen, O., Siren, A., & Hirvonen, J. (2026). MRI-based measurement of masseter muscle area: reliability and clinical relevance in acute neck infections. European Radiology.

Viertonen, V. S., Siren, A., Nyman, M., Huhtanen, H., Klen, R., Hirvonen, J., & Rainio, O. (2026). Acute deep neck infection MRI: deep learning segmentation and clinical relevance of retropharyngeal edema volume. European Radiology Experimental, 10(1), 15.

Misin, O., Piispanen, A., Matilainen, M., Parkkola, R., Nyman, M., Sainio, T., Hirvonen, J., & Airas, L. (2026). Real-world detection of paramagnetic rim lesions and their association with disease burden in multiple sclerosis. Multiple Sclerosis and Related Disorders, 107, 107012.

2025

Vierula, J.-P., Aro, K., Bode, M., Haapio, E., Hakumaki, J., Happonen, T., Hollmen, C., Huhtanen, H., Irjala, H., Jouppila-Matto, A., Nyman, M., et al. (2025). MRI edema patterns in acute neck infections: A multicenter and multidisciplinary interobserver study. European Journal of Radiology, 112526.

Kresanov, P., Nyman, M., Parkkola, R., Pirila, L., Ryyppo, L., & Taimen, K. (2025). Utility of cranial and cervical vessel magnetic resonance imaging as a diagnostic aid in a patient with suspected giant cell arteritis. Scandinavian Journal of Rheumatology, 1-3.

Rainio, O., Huhtanen, H., Vierula, J.-P., Nurminen, J., Heikkinen, J., Nyman, M., Klen, R., & Hirvonen, J. (2025). Deep learning detects retropharyngeal edema on MRI in patients with acute neck infections. European Radiology Experimental, 9(1), 60.

Huhtanen, J. T., Nyman, M., Blanco Sequeiros, R., Koskinen, S. K., Pudas, T. K., Kajander, S., Niemi, P., Aronen, H. J., & Hirvonen, J. (2025). Comparative accuracy of two commercial AI algorithms for musculoskeletal trauma detection in emergency radiographs. Emergency Radiology, 1-12.

Huhtanen, J. T., Nyman, M., Sequeiros, R. B., Koskinen, S. K., Pudas, T. K., Kajander, S., Niemi, P., Loyttyniemi, E., Aronen, H. J., & Hirvonen, J. (2025). Discrepancies between Radiology Specialists and Residents in Fracture Detection from Musculoskeletal Radiographs (vol 13, 3207, 2023) - Correction. Diagnostics, 15(1), 3.

Vierula, J-P, Merisaari, H, Heikkinen, J, Happonen, T, Siren, A, Velhonoja, J, Irjala, H, Soukka, T, Mattila, K, Nyman, M, Hirvonen, J (2025). MRI-based risk factors for intensive care unit admissions in acute neck infections. European Journal of Radiology Open, 14, 100648.

Huhtanen, H. J., Nyman, M. J., Karlsson, A., & Hirvonen, J. (2025). Machine Learning and Deep Learning Models for Automated Protocoling of Emergency Brain MRI Using Text from Clinical Referrals. Radiology: Artificial Intelligence, 7(3), e230620.

2024

Huhtanen, J. T., Nyman, M., Sequeiros, R. B., Koskinen, S. K., Pudas, T. K., Kajander, S., Niemi, P., Loyttyniemi, E., Aronen, H. J., & Hirvonen, J. (2024). Correction: Huhtanen et al. Discrepancies between Radiology Specialists and Residents in Fracture Detection from Musculoskeletal Radiographs. Diagnostics 2023, 13, 3207. Diagnostics, 15(1), 3.

Siren, A., Turkia, E., Nyman, M., & Hirvonen, J. (2024). Accuracy of Intra-Axial Brain Tumor Characterization in the Emergency MRI Reports: A Retrospective Human Performance Benchmarking Pilot Study. Diagnostics, 14(16), 1791.

Siren, A., Nyman, M., Syvanen, J., Mattila, K., & Hirvonen, J. (2024). Imaging Outcomes of MRI After CT in Pediatric Spinal Trauma: A Single-Center Experience. Journal of Pediatric Orthopaedics, 44(10), e887-93.

Happonen, T., Nyman, M., Ylikotila, P., Mattila, K., & Hirvonen, J. (2024). Imaging Outcomes of Emergency MR Imaging in Dizziness and Vertigo: A Retrospective Cohort Study. AJNR. American Journal of Neuroradiology.

Siren, A., Nyman, M., Syvanen, J., Mattila, K., & Hirvonen, J. (2024). Utility of brain imaging in pediatric patients with a suspected accidental spinal injury but no brain injury-related symptoms. Child's Nervous System, 40(5), 1435-1441.

Siren, A., Syvanen, J., Nyman, M., Mattila, K., & Hirvonen, J. (2024). Outcomes of Follow-up Imaging After Pediatric Spinal Trauma Confirmed With Magnetic Resonance Imaging. Journal of Pediatric Orthopedics.

2023

Huhtanen, J. T., Nyman, M., Sequeiros, R. B., Koskinen, S. K., Pudas, T. K., Kajander, S., Niemi, P., Loyttyniemi, E., Aronen, H. J., & Hirvonen, J. Discrepancies between Radiology Specialists and Residents in Fracture Detection from Musculoskeletal Radiographs. Diagnostics 13, no. 20 (January 2023): 3207.

Vierula, J.-P., Nurminen, J., Jussila, V., Nyman, M., Heikkinen, J., Pape, B., Sorvettula, K., Mattila, K., & Hirvonen, J. Diagnostic Performance of Short Noncontrast Biparametric 3-T MRI for Tonsillar Infections: Comparison with a Full Protocol Including Contrast-Enhanced Sequences. European Radiology Experimental 7, no. 1 (October 24, 2023): 65.

Siren, A., Nyman, M., Syvanen, J., Mattila, K., & Hirvonen, J. (2023). Clinical outcome following magnetic resonance imaging as first-line imaging in low-impact pediatric spine trauma: a single-center retrospective observational study. Pediatric Radiology.

Nurminen, J., Heikkinen, J., Happonen, T., Nyman, M., Siren, A., Vierula, J.-P., Velhonoja, J., Irjala, H., Soukka, T., Ivaska, L., Mattila, K., & Hirvonen, J. (2023). Pictorial Review of MRI Findings in Acute Neck Infections in Children. Children, 10(6), 967.

Hirvonen, J., & Nyman, M. (2023). Ostaisinko radiologista tekoalya sairaalaan-mita asiasta pitaa tietaa? Duodecim; Laaketieteellinen Aikakauskirja, 139(6), 421-423.

Siren, A., Nyman, M., Syvanen, J., Mattila, K., & Hirvonen, J. (2023). Emergency MRI in spine trauma of children and adolescents-A pictorial review. Children, 10(7).