PMID- 27278044
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20160610
LR  - 20181113
IS  - 1349-0222 (Print)
IS  - 1349-0222 (Linking)
VI  - 10
IP  - 2
DP  - 2012 Jun
TI  - Modified nonlinear complex diffusion filter (MNCDF).
PG  - 48-55
LID - 10.1007/s12574-012-0119-z [doi]
AB  - BACKGROUND: Speckle noise removal is the most important step in the processing of 
      echocardiographic images. A speckle-free image produces useful information to 
      diagnose heart-related diseases. Images which contain low noise and sharp edges 
      are more easily analyzed by the clinicians. This noise removal stage is also a 
      preprocessing stage in segmentation techniques. METHODS: A new formulation has 
      been proposed for a well-known nonlinear complex diffusion filter (NCDF). Its 
      diffusion coefficient and the time step size are modified to give fast processing 
      and better results. An investigation has been performed among nine patients 
      suffering from mitral regurgitation. Images have been taken with 2D echo in 
      apical and parasternal views. RESULTS: The peak signal-to-noise ratio (PSNR), 
      universal quality index (Qi), mean absolute error (MAE), mean square error (MSE), 
      and root mean square error (RMSE) have been calculated, and the results show that 
      the proposed method is much better than the previous filters for 
      echocardiographic images. CONCLUSIONS: The proposed method, modified nonlinear 
      complex diffusion filter (MNCDF), smooths the homogeneous area and enhances the 
      fine details.
FAU - Saini, Kalpana
AU  - Saini K
AD  - Department of Electrical Engineering, Indian Institute of Technology Roorkee, 
      A-28/1 Subhash Nagar, Roorkee, 247667, Uttarakhand, India. 
      kal_2312@rediffmail.com.
FAU - Dewal, M L
AU  - Dewal ML
AD  - Department of Electrical Engineering, Indian Institute of Technology Roorkee, 
      Roorkee, 247667, Uttarakhand, India.
FAU - Rohit, Manojkumar
AU  - Rohit M
AD  - Department of Cardiology, Advanced Cardiac Centre, Post Graduate Institute of 
      Medical Education and Research, Chandigarh, 160012, India.
LA  - eng
PT  - Journal Article
DEP - 20120328
PL  - Japan
TA  - J Echocardiogr
JT  - Journal of echocardiography
JID - 101263153
OTO - NOTNLM
OT  - Blurring
OT  - Diffusion coefficient
OT  - Echocardiographic images
OT  - Mitral regurgitation
OT  - Nonlinear complex diffusion
OT  - Speckle
EDAT- 2012/06/01 00:00
MHDA- 2012/06/01 00:01
CRDT- 2016/06/10 06:00
PHST- 2012/02/27 00:00 [received]
PHST- 2012/03/15 00:00 [accepted]
PHST- 2012/03/14 00:00 [revised]
PHST- 2016/06/10 06:00 [entrez]
PHST- 2012/06/01 00:00 [pubmed]
PHST- 2012/06/01 00:01 [medline]
AID - 10.1007/s12574-012-0119-z [pii]
AID - 10.1007/s12574-012-0119-z [doi]
PST - ppublish
SO  - J Echocardiogr. 2012 Jun;10(2):48-55. doi: 10.1007/s12574-012-0119-z. Epub 2012 
      Mar 28.