Journal
APPLIED SCIENCES-BASEL
Volume 11, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/app11041892
Keywords
registration; deformable; diffeomorphic; digital pathology; histology; histopathology; ANHIR challenge
Categories
Funding
- National Institutes of Health (NIH) [NCI:U24CA189523, NIBIB:R01EB017255, NIA:R01AG 056014, NIA:P30AG010124]
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The proposed two-step diffeomorphic registration method accurately aligns differently stained histology slices and was evaluated on a diverse dataset, demonstrating robustness and accuracy while maintaining computational efficiency. This approach shows promise for enhancing histological image alignment and understanding tissue structures.
Histopathologic assessment routinely provides rich microscopic information about tissue structure and disease process. However, the sections used are very thin, and essentially capture only 2D representations of a certain tissue sample. Accurate and robust alignment of sequentially cut 2D slices should contribute to more comprehensive assessment accounting for surrounding 3D information. Towards this end, we here propose a two-step diffeomorphic registration approach that aligns differently stained histology slides to each other, starting with an initial affine step followed by estimating a deformation field. It was quantitatively evaluated on ample (n = 481) and diverse data from the automatic non-rigid histological image registration challenge, where it was awarded the second rank. The obtained results demonstrate the ability of the proposed approach to robustly (average robustness = 0.9898) and accurately (average relative target registration error = 0.2%) align differently stained histology slices of various anatomical sites while maintaining reasonable computational efficiency (<1 min per registration). The method was developed by adapting a general-purpose registration algorithm designed for 3D radiographic scans and achieved consistently accurate results for aligning high-resolution 2D histologic images. Accurate alignment of histologic images can contribute to a better understanding of the spatial arrangement and growth patterns of cells, vessels, matrix, nerves, and immune cell interactions.
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