Ali Abbasian Ardakani, Ahmad Bitarafan-Rajabi, Ali Mohammadzadeh, Afshin Mohammadi, Reza Riazi, Jamileh Abolghasemi, Amir Homayoun Jafari, Mohammad Bagher Shiran
OBJECTIVES: Speckle noise is the main factor that degrades ultrasound image contrast and segmentation failure. Determining an effective filter can reduce speckle noise and improve segmentation performances. The aim of this study was to define a useful filter to improve the segmentation outcome. METHODS: Twelve filters, including median, hybrid median (Hmed), Fourier Butterworth, Fourier ideal, wavelet (Wlet), homomorphic Fourier Butterworth, homomorphic Fourier ideal, homomorphic wavelet (Hmp_Wlet), frost, anisotropic diffusion, probabilistic patch-based (PPB), and homogeneous area filters, were used to find the best filter(s) to prepare thyroid nodule segmentation...
August 31, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine