짝지어진 데이터셋을 이용한 분할-정복 U-net 기반 고화질 초음파 영상 복원

• Published in: Journal of biomedical engineering research Vol. 45; no. 3; pp. 118 - 127
• Main Authors: 유민하, 안치영, Minha Yoo, Chi Young Ahn
• Format: Journal Article
• Language: Korean
• Published: 대한의용생체공학회 01.06.2024
• Subjects: 의공학; Paired dataset; Image quality enhancement; Ultrasound imaging; U-net; Divide and conquer
• ISSN: 1229-0807; 2288-9396
• DOI: 10.9718/JBER.2024.45.3.118

Commonly deep learning methods for enhancing the quality of medical images use unpaired dataset due to the impracticality of acquiring paired dataset through commercial imaging system. In this paper, we propose a supervised learning method to enhance the quality of ultrasound images. The U-net model is designed by incorporating a divide-and-conquer approach that divides and processes an image into four parts to overcome data shortage and shorten the learning time. The proposed model is trained using paired dataset consisting of 828 pairs of low-quality and high-quality images with a resolution of 512x512 pixels obtained by varying the number of channels for the same subject. Out of a total of 828 pairs of images, 684 pairs are used as the training dataset, while the remaining 144 pairs served as the test dataset. In the test results, the average Mean Squared Error (MSE) was reduced from 87.6884 in the low-quality images to 45.5108 in the restored images. Additionally, the average Peak Signal-to-Noise Ratio (PSNR) was improved from 28.7550 to 31.8063, and the average Structural Similarity Index (SSIM) was increased from 0.4755 to 0.8511, demonstrating significant enhancements in image quality.