Sydney Lim was a member of the PICSL research staff in the Department of Radiology, working on postmortem imaging studies of neurodegenerative disease. Sydney contributed to studies linking ex vivo MRI to pathology, including tau pathology and cortical thinning in whole-hemisphere 7T MRI (2023), the 3D atlas of tau tangles in the medial temporal lobe (2024), MRI-guided histology for brain banking (2025) and subcortical atrophy and pathology (2026), as well as medial temporal lobe atrophy in semantic variant PPA (2021) and an anatomically valid segmentation protocol for anterior medial temporal lobe regions (Hippocampus, 2025).