Enhancement of the ultrasound images by modified anisotropic diffusion method |
| |
Authors: | Deepti Mittal Vinod Kumar Suresh Chandra Saxena Niranjan Khandelwal Naveen Kalra |
| |
Institution: | (1) Department of Electrical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India;(2) Department of Radiodiagnosis, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India |
| |
Abstract: | Speckle is a primary factor which degrades the contrast resolution and masks the meaningful texture information present in
an ultrasound image. Its presence severely hampers the interpretation and analysis of ultrasound images. When speckle reduction
technique is applied for visual enhancement of ultrasound images, it is to be kept in mind that blurring associated with speckle
reduction should be less and fine details are properly enhanced. With these points in consideration, the modified speckle
reduction anisotropic diffusion (MSRAD) method is proposed in the present study to improve the visual quality of the ultrasound
images. In the proposed MSRAD method, the four neighboring pixel template in speckle reduction anisotropic diffusion (SRAD)
method of Yu and Acton (IEEE Trans Image Process 11:1260–1270, 2002) have been replaced by a new template of larger number
of neighboring pixels to calculate the diffusion term. To enhance visual quality of ultrasound images, nonquadratic regularization
(Yu and Yadegar, Proceedings of the IEEE international conference on image processing, 2006) is incorporated with MSRAD method
and accordingly changes in parameter settings have been made. The performance of MSRAD method was evaluated using clinical
ultrasound images, interpretation by the medical experts and results of MSRAD method by subjective and objective criteria. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|