PMID- 17282030
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20121002
LR  - 20200309
IS  - 1557-170X (Print)
IS  - 1557-170X (Linking)
VI  - 2005
DP  - 2005
TI  - Modeling of pulmonary crackles using wavelet networks.
PG  - 7560-3
AB  - In this study, wavelet networks are used to model pulmonary crackles with a view 
      to extract features for the classification analysis of crackles obtained from 
      subjects with a wide spectrum of pulmonary disorders. Crackles are very common 
      adventitious sounds which are transient in character and whose characteristics, 
      such as type, number of occurrence and pitch, convey information regarding the 
      type and severity of the pulmonary disease. Crackles generally start with a sharp 
      deflection and continue with a damped and progressively wider sinusoidal wave. In 
      this study, due to the capability of time-frequency representation of wavelet 
      functions, wavelet network (WN) is employed to characterize crackles, and the 
      parameters acquired from wavelet nodes are used to distinguish them into two 
      clinical classes, i.e. fine and coarse. For this purpose, a wavelet function 
      (complex Morlet) in the first node is trained to fit the crackles and the second 
      wavelet node is tuned to represent the error of the first node. Both of the nodes 
      are, then, trained to minimize the total representative error. The five 
      parameters of the WN node, i.e. scaling, time-shifting, frequency and two weight 
      factors of sinus and cosines components are used as features in the 
      classification analysis of crackles. The crackle information is strongly 
      represented by the first wavelet node, therefore, the parameters belonging to the 
      first node are used in the classification of crackles.
FAU - Yeginer, M
AU  - Yeginer M
AD  - Institute of Biomedical Engineering, Bogazici University, Istanbul, Turkey.
FAU - Kahya, Y
AU  - Kahya Y
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Conf Proc IEEE Eng Med Biol Soc
JT  - Conference proceedings : ... Annual International Conference of the IEEE 
      Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and 
      Biology Society. Annual Conference
JID - 101243413
EDAT- 2007/02/07 09:00
MHDA- 2007/02/07 09:01
CRDT- 2007/02/07 09:00
PHST- 2007/02/07 09:00 [pubmed]
PHST- 2007/02/07 09:01 [medline]
PHST- 2007/02/07 09:00 [entrez]
AID - 10.1109/IEMBS.2005.1616261 [doi]
PST - ppublish
SO  - Conf Proc IEEE Eng Med Biol Soc. 2005;2005:7560-3. doi: 
      10.1109/IEMBS.2005.1616261.