L. Molenaar MSc (Lennert)

Lennert Molenaar was born in Leiden, The Netherlands, in 1990. After graduating high school in 2008 he started to study Medicine at the University of Leiden, in 2009 he switched to Technical Medicine at the University of Twente. He obtained his master's degree (Medical Imaging & Intervention) in 2017. After four internships at three different hospitals and one mechatronics company, he graduated at the surgery department of Meander Medical hospital at Amersfoort under supervision of prof. dr. Ivo AMJ Broeders. Here he compared an active robotic laparoscopic camera holder with human steering. After graduation he started a PhD position at the Magnetic Detection & Imaging (MD&I) group at the University of Twente.

During his PhD Lennert is going to realize the clinical implementation of a newly developed laparoscopic magnetic probe for sentinel lymph node detection. This will be achieved by executing multiple trials; testing of different magnetic particles necessary for the lymph node detection, evaluating the depth penetration of the newly developed probe and human safety and efficacy tests.

Engineering & Materials Science

# Iron Oxides
# Magnetic Nanoparticles
# Tracers

Medicine & Life Sciences

# Ferric Oxide
# Nanoparticles
# Robotics
# Sentinel Lymph Node
# Sentinel Lymph Node Biopsy

Molenaar, L. , Loosdrecht, M. M. H. V. D. , Alic, L., Baarlen, J. V., Meijerink, J. J. H. J. , Haken, B. T. , Broeders, I. A. M. J., & Lips, D. J. (2022). Quantification of Magnetic Nanoparticles in ex vivo Colorectal Lymph Nodes. Nano LIFE, 12(03), [2250006]. https://doi.org/10.1142/S1793984422500064

Molenaar, L. , Horstman-van de Loosdrecht, M. M. , Krooshoop, H. J. G. , Wesselink, R. J. H. , Ten Haken, B. , Broeders, I. A. M. J. , & Alic, L. (2022). Excitation coil for sentinel lymph node harvesting: design, digital twin and prototype. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference, 2022, 4402-4406. https://doi.org/10.1109/EMBC48229.2022.9871415

Molenaar, L. (2022). Sentinel lymph node biopsy using magnetic nanoparticles: Towards implementation in laparoscopic surgery. [PhD Thesis - Research UT, graduation UT, University of Twente]. University of Twente. https://doi.org/10.3990/1.9789036554060

Wijsman, P. J. M. , Molenaar, L., Voskens, F. J., van ’t Hullenaar, C. D. P. , & Broeders, I. A. M. J. (2022). Image-based laparoscopic camera steering versus conventional steering: a comparison study. Journal of robotic surgery, 16(5), 1157-1163. https://doi.org/10.1007/s11701-021-01342-0

van de Loosdrecht, M. , Molenaar, L. , Krooshoop, E. , Haken, B. T., Meijerink, J. , Alic, L. , & Broeders, I. A. M. J. (2022). Laparoscopic Probe for Sentinel Lymph Node Harvesting using Magnetic Nanoparticles. IEEE transactions on biomedical engineering, 69(1), 286-293. https://doi.org/10.1109/TBME.2021.3092437

Azargoshasb, S. , Molenaar, L., Rosiello, G., Buckle, T., van Willigen, D. M. , van de Loosdrecht, M. M., Welling, M. M. , Alic, L. , van Leeuwen, F. W. B., Winter, A., & van Oosterom, M. N. (2022). Advancing intraoperative magnetic tracing using 3D freehand magnetic particle imaging. International journal of computer assisted radiology and surgery, 17(1), 211-218. https://doi.org/10.1007/s11548-021-02458-2

Wijsman, P. J. M., Voskens, F. J. , Molenaar, L., van ‘t Hullenaar, C. D. P., Consten, E. C. J., Draaisma, W. A. , & Broeders, I. A. M. J. (2022). Efficiency in image-guided robotic and conventional camera steering: a prospective randomized controlled trial. Surgical endoscopy, 36(4), 2334–2340. https://doi.org/10.1007/s00464-021-08508-9

Horstman - van de Loosdrecht, M. M. , Molenaar, L. , Krooshoop, E. , ten Haken, B., Meijerink, W. J. H. J. , Alic, L. , & Broeders, I. A. M. J. (2021). Magnetic nanoparticle detector for laparoscopic surgery: assessment of detection sensitivity. Abstract from International congress on computer assisted radiology and surgery, CARS 2021, Munich, Germany.

Molenaar, L. , van de Loosdrecht, M. M., van Baarlen, J. , Broeders, I. A. M. J. , ten Haken, B., & Roelink, H. (2019). Sentinel node procedure in prostate and bladder cancer utilizing differential magnetometry: A first patient trial. Poster session presented at 9th International Workshop on Magnetic Particle Imaging 2019, New York, New York, United States.

Wijsman, P. J. M. , Molenaar, L., van‘t Hullenaar, C. D. P., van Vugt, B. S. T., Bleeker, W. A., Draaisma, W. A. , & Broeders, I. A. M. J. (2019). Ergonomics in handheld and robot-assisted camera control: a randomized controlled trial. Surgical endoscopy, 33(12), 3919-3925. https://doi.org/10.1007/s00464-019-06678-1

+31534891593

l.molenaar@utwente.nl

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University of Twente
Drienerlolaan 5
7522 NB Enschede
The Netherlands

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P.O. Box 217
7500 AE Enschede
The Netherlands

University of Twente Drienerlolaan 5
7522 NB Enschede

+31 (0)53 489 9111
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