Efficient Scopeformer: Toward Scalable and Rich Feature Extraction for Intracranial Hemorrhage Detection

Authors

Yassine Barhoumi, Rowan University
Nidhal Carla Bouaynaya, Rowan UniversityFollow
Ghulam Rasool, Rowan UniversityFollow

Document Type

Article

Version Deposited

Published Version

Open Access Funding Source

Other

Publication Date

8-2-2023

Publication Title

IEEE Access

DOI

10.1109/ACCESS.2023.3301160

Abstract

The quality and richness of feature maps extracted by convolution neural networks (CNNs) and vision Transformers (ViTs) directly relate to the robust model performance. In medical computer vision, these information-rich features are crucial for detecting rare cases within large datasets. This work presents the “Scopeformer,” a novel multi-CNN-ViT model for intracranial hemorrhage classification in computed tomography (CT) images. The Scopeformer architecture is scalable and modular, which allows utilizing various CNN architectures as the backbone with diversified output features and pre-training strategies. We propose effective feature projection methods to reduce redundancies among CNN-generated features and to control the input size of ViTs. Extensive experiments with various Scopeformer models show that the model performance is proportional to the number of convolutional blocks employed in the feature extractor. Using multiple strategies, including diversifying the pre-training paradigms for CNNs, different pre-training datasets, and style transfer techniques, we demonstrate an overall improvement in the model performance at various computational budgets. Later, we propose smaller compute-efficient Scopeformer versions with three different types of input and output ViT configurations. Efficient Scopeformers use four different pre-trained CNN architectures as feature extractors to increase feature richness. Our best Efficient Scopeformer model achieved an accuracy of 96.94% and a weighted logarithmic loss of 0.083 with an eight times reduction in the number of trainable parameters compared to the base Scopeformer. Another version of the Efficient Scopeformer model further reduced the parameter space by almost 17 times with negligible performance reduction. In summary, our work showed that the hybrid architectures consisting of CNNs and ViTs might provide the desired feature richness for developing accurate medical computer vision models.

Comments

Copyright 2023 The Authors

IEEE Access is the IEEE's Open Access journal.

Recommended Citation

Y. Barhoumi, N. C. Bouaynaya and G. Rasool, "Efficient Scopeformer: Toward Scalable and Rich Feature Extraction for Intracranial Hemorrhage Detection," in IEEE Access, vol. 11, pp. 81656-81671, 2023, doi: 10.1109/ACCESS.2023.3301160.

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.