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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한의용생체공학회 Biomedical Engineering Letters (BMEL) Biomedical Engineering Letters (BMEL) Vol.5 No.1
- 발행연도
- 2015.1
- 수록면
- 33 - 44 (12page)
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Purpose The problems of speckle noise, low contrast, andother artifacts in continuous wave Doppler (CWD) basedechocardiographic images are identical to the issues prevailingin the B-mode images. The median filter and Gaussian lowpass filter are more commonly used for reduction of noise inCWD images. The applications of state-of-the-art despecklingfilters and their impact on delineation are not extensivelyanalyzed using CW Doppler images.
Methods This paper analyses the noise reduction, edge andstructure preservation characteristics of ten filters for CWDimages in terms of 15 image quality metrics along with visualquality assessment. Further, three segmentation techniqueswere analyzed using original and noisy CWD images. Threeexisting delineation techniques are modified for tracing theouter boundaries of CWD spectrum. The Gaussian filter usedreaction-diffusion based active contour and thresholdingbased segmentation techniques are replaced by despecklingfilter based on anisotropic diffusion and local statistics.
Results The noise is suppressed with edges and structurewell preserved on application of filters such as specklereducing anisotropic diffusion filter and local statics (meanand variance) based filter. The number of iterations requiredin complete boundary tracing is reduced on replacing theGaussian filter with despeckling filter in reaction diffusionbased active contour segmentation.
Conclusions The analysis reveals that the despecklingtechniques enhance the visual quality of images and play avital role in delineation process. The reaction diffusion basedactive contour embedded with speckle reducing anisotropicdiffusion filter results in accurate contouring of the CWDimages.
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참고문헌 (27)
참고문헌 신청
Zolgharni M / 2014 / Automated aortic doppler flow tracing for reproducible research and clinical measurements / IEEE Trans Med Imaging 33(5):1071~1082
Park J / 2008 / Automatic mitral valve inflow measurements from doppler echocardiography / Conf Proc Med Image Comput Comput Assist Interv 5241:983~990
Quiñones MA / 2002 / Recommendations for quantification of doppler echocardiography: a report from the doppler quantification task force of the nomenclature and standards committee of the american society of echocardiography / J Am Soc Echocardiogr 15(2):167~184
Shechner P / 2004 / Image analysis of doppler echocardiography for patients with atrial fibrillation / Conf Proc IEEE Int Symp Biomed Imaging : Nano to Macro 1:488~491
Gong J / 2001 / Computer processing of cw doppler trans-valvular spectrograms / Conf Proc IEEE Intell Inf Sys-The Seventh Australian and New Zealand 1:335~340
Park J / 2008 / Automatic mitral valve inflow measurements from doppler echocardiography / Conf Proc Med Image Comput Comput Assist Interv 5241:983~990
Quiñones MA / 2002 / Recommendations for quantification of doppler echocardiography: a report from the doppler quantification task force of the nomenclature and standards committee of the american society of echocardiography / J Am Soc Echocardiogr 15(2):167~184
Shechner P / 2004 / Image analysis of doppler echocardiography for patients with atrial fibrillation / Conf Proc IEEE Int Symp Biomed Imaging : Nano to Macro 1:488~491
Gong J / 2001 / Computer processing of cw doppler trans-valvular spectrograms / Conf Proc IEEE Intell Inf Sys-The Seventh Australian and New Zealand 1:335~340
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