Bastien Le Guellec, MD

Neuroradiology Fellow & PhD Researcher
Generative AI | Medical NLP | Advanced Neuroimaging

Lille University Hospital
PhD Candidate @ Lilncog U1172 (Inserm)

About Me

I am a Neuroradiology Fellow at Lille University Hospital, specializing in Brain and Head & Neck imaging. My clinical work involves advanced imaging modalities, including Photon-Counting CT and Spectral CT, as well as the clinical implementation of a 7T MRI scanner (Siemens Terra).

I am concurrently pursuing a PhD on the applications of Large Language Models (LLMs) in Radiology at the Lilncog U1172 lab, supervised by Prof. Grégory Kuchcinski and Dr. Aghiles Hamroun.

Professional Activities

Flagship Projects

Grant Funded / NLP

CEPHALALG.IA

A specialized initiative testing the applications of privacy-preserving LLMs for the extraction and simplification of medical data. The project focuses on processing brain MRI reports and Emergency Room discharge summaries for patients consulting for headaches, aiming to improve both clinical workflows and patient understanding.

Open Data / NLP

PARROT Dataset

The Polyglottal Annotated Radiology Reports for Open Testing is a multicentric dataset of 2,700+ reports in 13 languages, designed to benchmark Medical NLP across linguistic borders.
[View in EJRAI]

Software & Tools

Selected Publications

Diagnostic and Interventional Imaging (2025)

Comparison between multimodal foundation models and radiologists for the diagnosis of challenging neuroradiology cases

B Le Guellec, et al. | DOI: 10.1016/j.diii.2025.04.006

Radiology: Artificial Intelligence (2024)

Performance of an Open-Source LLM in Extracting Information from Free-Text Radiology Reports

B Le Guellec, et al. | DOI: 10.1148/ryai.230364

JMIR (2025)

Token Probabilities to Mitigate LLM Overconfidence in Answering Medical Questions

R Bentegeac, B Le Guellec, et al. | DOI: 10.2196/64348

PNAS (2022)

Flux coupling shapes the transport and phylogeny of SLC6 glycine transporters

B Le Guellec, et al. | DOI: 10.1073/pnas.2205874119