Abstract：
:A good statistical model of speckle formation is useful for designing a good adaptive filter for speckle reduction In ultrasound B-scan images. Previously, statistical models have been used, but they failed to account for the log compression of the echo envelope employed by clinical ultrasound systems. Log-compression helps in reducing the dynamic range of the B-scan Images for display on a monitor as well as enhancing weak backscatters. In this article, statistics of log-compressed echo images, using the K-distribution statistical model for the echo envelope, are used to derive a parameter that can be used to quantify the extent of speckle formation. This speckle quantification can be used with an unsharp masking filter to adaptively reduce speckle. The effectiveness of the filter is demonstrated on images of contrast detail phantoms and on in-vivo abdominal images obtained by a clinical ultrasound system with log-compression.
journal_name
IEEE Trans Med Imagingjournal_title
IEEE transactions on medical imagingauthors
Dutt V,Greenleaf JFdoi
10.1109/42.544498subject
Has Abstractpub_date
1996-01-01 00:00:00pages
802-13issue
6eissn
0278-0062issn
1558-254Xjournal_volume
15pub_type
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