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My name is Masatoshi nakashima,
I am learning ultrasound signal processing.
Please teach me about wallfilter algorithm.
In Application Report SPRAB11–November 2008
"Efficient Implementation of Ultrasound Color DopplerAlgorithms on Texas Instruments’ C64x™ Platforms",
there is a explanation of wallfilter.
"This module does an IIR filtering operation.
The basic operation done for filtering for each scan-line set is a multiplication of complex inputdata matrix, X, with real coefficient matrix, W, given by,
Y DxN =X DxN * W NxN "
I can not understand why this equation expresses IIR. I think IIR should have feedback input.
(1) Please teach me, what is feedback element in this matrix conversion equation.
(2)Please teach me, how to design W matrix.
Please pardon me for my poor knowledge.
This is a follow by myself. I read "Clutter Filter Design for Ultrasound Color Flow Imaging",
I understood IIR design method a little.
(1) what initialization method is adopted in the wall filter of MIDAS demo V3?
(2) Please teach the design parameter of the wall fileter of MIDAS demo v3.
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In reply to masatoshi nakashima:
This post should answer your 2 questions:
--- If you need more help, please reply. If this answers your question, please Verify Answer below this post ---
In reply to Uday:
Thank you for your answer. I read the post which was shown me.
But I can not found wf_coeff.m.
Please teach me where it is.
And I can not found(understand ) the method of the filter initialization in the post.
Dear Mr. Gurnari,
I have read the post that you show me.
I can not find wf_coeff.m . Please teach me where it is.
The STK-MED that the e2e post refers to is the Medical Imaging Software Toolkit (STK-MED). You can download the latest STK-MED v3.0 from http://www.ti.com/tool/s2meddus and the file is located at 'stk-med-03.xx.xx.xx\miAlgos\dpu\test\vectors\wf_coeff.m'
Thank you for your quick answer. I have read wf_coff.m.
I have understood this filtering.
Thank you again.
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