Geert Janssens

Associate Professor - medical

Strategic program(s):

Contact

gjansse3@umcutrecht.nl

Pure profile

Research groups

Pediatric radiation oncology

Research aim

To optimize radiotherapy in pediatric renal tumors (Wilms), neuroblastomas, and high-grade gliomas To better understand side effects from radiotherapy To reduce inequalities in radiotherapeutic care across SIOP Europe affliliated countries.

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Recent publications

All publications

Current pattern of care in brain and near-brain tumor radiotherapy for infants and young children Kristina Gaus, Petter Brandal, Martina Stickan-Verfürth, Heike Thomas, Stefanie Schulze Schleithoff, Rolf Dieter Kortmann, Yasmin Lassen-Ramshad, Thankamma Ajithkumar, Geert O. Janssens, Henriette Magelssen, Beate Timmermann
EJC Paediatric Oncology, 2026, vol. 7

Reply to comment on impact of deep learning on CT-based organ-at-risk delineation for flank irradiation in paediatric renal tumours Mianyong Ding, Matteo Maspero, Semi Harrabi, Emmanuel Jouglar, Sabina Vennarini, Timothy Spencer, Britta Weber, Henriette Magelssen, Karen Van Beek, Remus Stoica, Simonetta Saldi, Tom Boterberg, Patrick Melchior, Marry M. van den Heuvel-Eibrink, Geert O. Janssens
Clinical and translational radiation oncology, 2026, vol. 57

Impact of deep learning on CT-based organ-at-risk delineation for flank irradiation in paediatric renal tumours Mianyong Ding, Matteo Maspero, Semi Harrabi, Emmanuel Jouglar, Sabina Vennarini, Timothy Spencer, Britta Weber, Henriette Magelssen, Karen Van Beek, Remus Stoica, Simonetta Saldi, Tom Boterberg, Patrick Melchior, Marry M. van den Heuvel-Eibrink, Geert O. Janssens
Clinical and translational radiation oncology, 2026, vol. 56

Development of the first prediction model for radiation-induced contrast enhancement after proton therapy for posterior fossa tumours in paediatric patients Abel Bregman, Jikke J Rutgers, Truls Andersen, Arjen van der Schaaf, Charlotte L Brouwer, Geert O Janssens, Eelco W Hoving, Maarten H Lequin, Rutger A J Nievelstein, Stefan Both, Johannes A Langendijk, Hiska L van der Weide, John H Maduro, Dirk Wagenaar
Radiotherapy and Oncology, 2025, vol. 216

Prevalence and Determinants of Impaired Bone Mineral Density and Fractures in the First National Dutch Wilms Tumor Survivor Cohort, a National DCCSS-LATER Study Francis S P L Wens, Demi T C de Winter, Geert O Janssens, Rens Litjens, Jenneke E van Atteveld, Rutger A J Nievelstein, Monique G G Hobbelink, Andrica C H de Vries, Jacqueline J Loonen, Eline van Dulmen-den Broeder, Helena J H van der Pal, Saskia M F Pluijm, Leontien C M Kremer, Margriet van der Heiden-van der Loo, Marloes Louwerens, Hanneke M van Santen, Daniel S Olsson, Imo Hoefer, Sjoerd A A van den Berg, Harm van Tinteren, Sebastian J C M M Neggers, Marry M van den Heuvel-Eibrink
Cancer Medicine, 2025, vol. 14

Imaging Changes With or Without Neurologic Symptoms After Proton Therapy in Pediatric Posterior Fossa Tumors Jikke J Rutgers, John H Maduro, Peter S N van Rossum, Maarten H Lequin, Hiske L van der Weide, Bianca A W Hoeben, Astrid van der Heide, Sabine L A Plasschaert, Abel Bregman, Witold P Matysiak, Enrica Seravalli, Johannes A Langendijk, Eelco W Hoving, Geert O Janssens
International journal of radiation oncology, biology, physics, 2025, vol. 124, p.376-386