User profiles for N.C. Lehnen

Nils Lehnen

Oberarzt Klinik für Neuroradiologie, Universitätsklinium Bonn
Verified email at ukbonn.de
Cited by 229

[HTML][HTML] Detection of degenerative changes on MR images of the lumbar spine with a convolutional neural network: a feasibility study

NC Lehnen, R Haase, J Faber, T Rüber, H Vatter… - Diagnostics, 2021 - mdpi.com
Our objective was to evaluate the diagnostic performance of a convolutional neural network
(CNN) trained on multiple MR imaging features of the lumbar spine, to detect a variety of …

Data Extraction from Free-Text Reports on Mechanical Thrombectomy in Acute Ischemic Stroke Using ChatGPT: A Retrospective Analysis

NC Lehnen, F Dorn, IC Wiest, H Zimmermann… - Radiology, 2024 - pubs.rsna.org
Background Procedural details of mechanical thrombectomy in patients with ischemic stroke
are important predictors of clinical outcome and are collected for prospective studies or …

Fibroblast growth factor receptor 1 gene amplification in pancreatic ductal adenocarcinoma

NC Lehnen, A von Mässenhausen, H Kalthoff… - …, 2013 - Wiley Online Library
Fibroblast growth factor receptor 1 gene amplification in pancreatic ductal adenocarcinoma
- Lehnen - 2013 - Histopathology - Wiley Online Library … Nils C Lehnen … Nils C Lehnen

[HTML][HTML] Brain volume changes after COVID-19 compared to healthy controls by artificial intelligence-based MRI volumetry

…, YL Layer, R Haase, M Sauer, L Bieler, NC Lehnen… - Diagnostics, 2023 - mdpi.com
Cohort studies that quantify volumetric brain data among individuals with different levels of
COVID-19 severity are presently limited. It is still uncertain whether there exists a potential …

Fibroblast growth factor receptor 1 gene amplification in gastric adenocarcinoma

MH Schäfer, P Lingohr, A Sträßer, NC Lehnen… - Human pathology, 2015 - Elsevier
Gastric adenocarcinomas are associated with a poor prognosis due to the fact that the tumor
has often metastasized by the time of diagnosis. Thus, identification of novel therapeutic …

[HTML][HTML] Proton density fat fraction spine MRI for differentiation of erosive vertebral Endplate degeneration and infectious Spondylitis

FC Schmeel, A Lakghomi, NC Lehnen, R Haase… - Diagnostics, 2021 - mdpi.com
Vertebral Modic type 1 (MT1) degeneration may mimic infectious disease on conventional
spine magnetic resonance imaging (MRI), potentially leading to additional costly and invasive …

[HTML][HTML] First experience with the nimbus stentretriever: a novel device to handle fibrin-rich clots

NC Lehnen, D Paech, S Zülow, FJ Bode… - Clinical …, 2023 - Springer
Purpose To share our first experience with the Nimbus stentretriever, a multizone device
designed to assist neurointerventionalists in handling fibrin-rich clots in endovascular stroke …

Clinical significance and prevalence of subarachnoid hyperdensities on flat detector CT after mechanical thrombectomy: does it really matter?

…, FJ Bode, JM Weller, N Krueger, NC Lehnen… - Journal of …, 2023 - jnis.bmj.com
Background Subarachnoid hyperdensities after mechanical thrombectomy (MT) are a common
finding. However, it is often regarded as clinically insignificant. Objective With this single-…

[HTML][HTML] External evaluation of a deep learning-based approach for automated brain volumetry in patients with huntington's disease

R Haase, NC Lehnen, FC Schmeel, K Deike… - Scientific Reports, 2024 - nature.com
A crucial step in the clinical adaptation of an AI-based tool is an external, independent
validation. The aim of this study was to investigate brain atrophy in patients with confirmed, …

Automated detection of cerebral aneurysms on TOF-MRA using a deep learning approach: An external validation study

NC Lehnen, R Haase, FC Schmeel… - American Journal …, 2022 - Am Soc Neuroradiology
BACKGROUND AND PURPOSE: Cerebral aneurysms yield the risk of rupture, severe
disability and death. Thus, early detection of cerebral aneurysms is crucial to ensure timely …