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Reverberation Reduc...
Reverberation Reduction Using 3D Wiener Filtering
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- Eriksson-Bylund, Nina (författare)
- Linköpings universitet,Medicinsk informatik,Tekniska högskolan
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- Ressner, Marcus (författare)
- Linköpings universitet,Fysiologisk mätteknik,Tekniska högskolan
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- Knutsson, Hans (författare)
- Linköpings universitet,Medicinsk informatik,Tekniska högskolan
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(creator_code:org_t)
- 2003
- 2003
- Engelska.
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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visa fler...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- One of the most common artifacts in ultrasound imaging is reverberations. These are multiple reflection echoes that register as coming from a deeper region than the depth of the interface that are causing them, and result in ghost echoes in the ultrasound image. A method to reduce these unwanted artifacts using a three dimensional (2D + time) Wiener filter has been developed. Two sequences of iq-data, the least processed signal possible to retrieve from the ultrasound system (Vingmed System Five), have been used to test the method: One sequence on a tissue-mimicking agar gel phantom in which bars of glass simulating ribs give rise to reverberations, and one sequence on an open-chest pig with a strong reverberation from a water-filled rubber glove used as a medium between the heart and the transducer. The procedure works as follows: In a graphic interface the operator is shown the image sequence. In one of the frames two areas must be marked out; One area which contains a typical reverberation artifact, and one area which will represent an artifact free signal. After creating the three dimensional Wiener filter post-processing of the sequence is performed. The developed method significantly reduced the magnitude of the reverberation artifact in the tested sequences.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinsk bioteknologi -- Biomedicinsk laboratorievetenskap/teknologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Medical Biotechnology -- Biomedical Laboratory Science/Technology (hsv//eng)
Nyckelord
- Medical informatics
- Medicinsk informatik
Publikations- och innehållstyp
- vet (ämneskategori)
- kon (ämneskategori)