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@ARTICLE{Pollak:277719,
author = {Pollak, Clemens and Kügler, David and Bauer, Tobias and
Rüber, Theodor and Reuter, Martin},
title = {{F}ast{S}urfer-{LIT}: {L}esion inpainting tool for
whole-brain {MRI} segmentation with tumors, cavities, and
abnormalities.},
journal = {Imaging neuroscience},
volume = {3},
issn = {2837-6056},
address = {Cambridge, MA},
publisher = {MIT Press},
reportid = {DZNE-2025-00445},
pages = {$imag_a_00446$},
year = {2025},
abstract = {Resection cavities, tumors, and other lesions can
fundamentally alter brain structure and present as
abnormalities in brain MRI. Specifically, quantifying subtle
neuroanatomical changes in other, not directly affected
regions of the brain is essential to assess the impact of
tumors, surgery, chemo/radiotherapy, or drug treatments.
However, only a limited number of solutions address this
important task, while many standard analysis pipelines
simply do not support abnormal brain images at all. In this
paper, we present a method to perform sensitive
neuroanatomical analysis of healthy brain regions in the
presence of large lesions and cavities. Our approach called
'FastSurfer Lesion Inpainting Tool' (FastSurfer-LIT)
leverages the recently emerged Denoising Diffusion
Probabilistic Models (DDPM) to fill lesion areas with
healthy tissue that matches and extends the surrounding
tissue. This enables subsequent processing with established
MRI analysis methods such as the calculation of adjusted
volume and surface measurements using FastSurfer or
FreeSurfer. FastSurfer-LIT significantly outperforms
previously proposed solutions on a large dataset of
simulated brain tumors (N = 100) and synthetic multiple
sclerosis lesions (N = 39) with improved Dice and Hausdorff
measures, and also on a highly heterogeneous dataset with
lesions and cavities in a manual assessment (N = 100).
Finally, we demonstrate increased reliability to reproduce
pre-operative cortical thickness estimates from
corresponding post-operative temporo-mesial resection
surgery MRIs. The method is publicly available at
https://github.com/Deep-MI/LIT and will be integrated into
the FastSurfer toolbox.},
keywords = {brain filling (Other) / inpainting (Other) / lesion (Other)
/ segmentation (Other) / software (Other) / tumor (Other)},
cin = {AG Reuter},
ddc = {610},
cid = {I:(DE-2719)1040310},
pnm = {354 - Disease Prevention and Healthy Aging (POF4-354)},
pid = {G:(DE-HGF)POF4-354},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:40109899},
pmc = {pmc:PMC11917724},
doi = {10.1162/imag_a_00446},
url = {https://pub.dzne.de/record/277719},
}