간 초음파 영상에서의 스페클 노이즈 제거를 위한 필터들의 비교 평가

• 영문명: Comparative Evaluation of Filters for Speckle Noise Reduction in a Clinical Liver Ultrasound Image
• 발행기관: 대한방사선과학회(구 대한방사선기술학회)
• 저자명: 김하진(Hajin Kim) 이영진(Youngjin Lee)
• 간행물 정보: 『방사선기술과학』제46권 제6호, 475~484쪽, 전체 10쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2023.12.31

영문 초록

This study aimed to compare filters for reducing speckle noise in ultrasound images using clinical liver images. We acquired the clinical liver ultrasound images, and noisy images were obtained by adding 0.01, 0.05, 0.10, and 0.50 intensity levels of speckle noise to the liver images. The Wiener filter, median modified Wiener filter, gamma filter, and Lee filter were designed for the noisy images by setting window sizes at 3×3, 5×5, and 7×7. The coefficient of variation (COV) and contrast to noise ratio (CNR) were calculated to evaluate noise reduction and various filters. Moreover, the fil- ter with the highest image quality was selected and quantitatively compared to a noisy image. As a result, COV and CNR showed the noise improved result when the Lee filter was applied. Furthermore, the Lee filter image with a window size of 7×7 was noted to possess approximately a minimum of 1.28 to a maximum of 3.38 times better COV and a minimum of 2.18 to a maximum of 5.50 times better CNR than the noisy image. In conclusion, we confirmed that the Lee filter was effective in reducing speckle noise and proved that an appropriate window size needs to be set considering blurring.

목차

Ⅰ. Introduction

Ⅱ. Materials and methods

Ⅲ. Results

Ⅳ. Discussion

Ⅴ. Conclusions

REFERENCES

키워드

간 초음파 영상 간 혈관 스페클 노이즈 제거 Lee 필터 윈도우 크기 정량적 평가 Liver Ultrasound Image Liver Blood Vessel Speckle Noise Reduction Lee Filter Window Size Quantitative Evaluation