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Heart sound cancell...
Heart sound cancellation from lung sound recordings using recurrence time statistics and nonlinear prediction
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- Ahlström, Christer (författare)
- Linköpings universitet,Fysiologisk mätteknik,Tekniska högskolan,Institutionen för medicinsk teknik
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- Liljefeldt, Olle (författare)
- Linköpings universitet,Institutionen för medicinsk teknik,Tekniska högskolan
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- Hult, Peter (författare)
- Linköpings universitet,Fysiologisk mätteknik,Tekniska högskolan,Institutionen för medicinsk teknik
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- Ask, Per (författare)
- Linköpings universitet,Fysiologisk mätteknik,Tekniska högskolan,Institutionen för medicinsk teknik
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(creator_code:org_t)
- Institutionen för medicinsk teknik, 2005
- 2005
- Engelska.
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Ingår i: IEEE Signal Processing Letters. - : Institutionen för medicinsk teknik. - 1070-9908 .- 1558-2361. ; 12:12, s. 812-815, s. 812-815
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Heart sounds (HS) obscure the interpretation of lung sounds (LS). This letter presents a new method to detect and remove this undesired disturbance. The HS detection algorithm is based on a recurrence time statistic that is sensitive to changes in a reconstructed state space. Signal segments that are found to contain HS are removed, and the arising missing parts are replaced with predicted LS using a nonlinear prediction scheme. The prediction operates in the reconstructed state space and uses an iterated integrated nearest trajectory algorithm. The HS detection algorithm detects HS with an error rate of 4% false positives and 8% false negatives. The spectral difference between the reconstructed LS signal and an LS signal with removed HS was 0.34/spl plusmn/0.25, 0.50/spl plusmn/0.33, 0.46/spl plusmn/0.35, and 0.94/spl plusmn/0.64 dB/Hz in the frequency bands 20-40, 40-70, 70-150, and 150-300 Hz, respectively. The cross-correlation index was found to be 99.7%, indicating excellent similarity between actual LS and predicted LS. Listening tests performed by a skilled physician showed high-quality auditory results.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk apparatteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Equipment Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Nyckelord
- Bioacoustics
- heart sound (HS)
- lung sound (LS)
- nonlinear prediction
- recurrence time statistics
- TECHNOLOGY
- TEKNIKVETENSKAP
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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