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Texture-Based Preprocessing Framework with nnU-Net Model for Accurate Intracranial Artery Segmentation

Tallennettuna:
Julkaisussa:Journal of Imaging vol. 11, no. 12 (2025), p. 438-459
Päätekijä: Kyuseok, Kim
Muut tekijät: Ji-Youn, Kim
Julkaistu:
MDPI AG
Aiheet:
Accuracy
Preprocessing
Deep learning
Datasets
Blood vessels
Image segmentation
Neural networks
Veins & arteries
Algorithms
Time series
Medical imaging
Visualization
Entropy
Texture
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Abstrakti:Accurate intracranial artery segmentation from digital subtraction angiography (DSA) is critical for neurovascular diagnosis and intervention planning. Vascular extraction, which combines preprocessing methods and deep learning models, yields a high level of results, but limited preprocessing results constrain the improvement of results. We propose a texture-based contrast enhancement preprocessing framework integrated with the nnU-Net model to improve vessel segmentation in time-sequential DSA images. The method generates a combined feature mask by fusing local contrast, local entropy, and brightness threshold maps, which is then used as input for deep learning–based segmentation. Segmentation performance was evaluated using the DIAS dataset with various standard quantitative metrics. The proposed preprocessing significantly improved segmentation across all metrics compared to both the baseline and contrast-limited adaptive histogram equalization (CLAHE). Using nnU-Net, the method achieved a Dice Similarity Coefficient (DICE) of 0.83 ± 0.20 and an Intersection over Union (IoU) of 0.72 ± 0.14, outperforming CLAHE (DICE 0.79 ± 0.41, IoU 0.70 ± 0.23) and the baseline (DICE 0.65 ± 0.15, IoU 0.47 ± 0.20). Most notably, vessel connectivity (VC) dropped by over 65% relative to unprocessed images, indicating marked improvements in VC and topological accuracy. This study demonstrates that combining texture-based preprocessing with nnU-Net delivers robust, noise-tolerant, and clinically interpretable segmentation of intracranial arteries from DSA.
ISSN:2313-433X
DOI:10.3390/jimaging11120438
Lähde:Advanced Technologies & Aerospace Database