TY - JOUR
T1 - Two-dimensional fourier filtration of acoustic quantification echocardiographic images
T2 - Improved reproducibility and accuracy of automated measurements of left ventricular performance
AU - Chandra, Shalabh
AU - Garcia, Mario J.
AU - Morehead, Annitta
AU - Thomas, James D.
N1 - Funding Information:
Supported in part by grant-in-aid No. 93013880 from the American Heart Association, Dallas, Texas (S.C. and J.D.T.) and by an equipment grant from Hewlett-Packard, Palo Alto, California
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1997
Y1 - 1997
N2 - To determine the accuracy of Fourier filtration in removing the high-frequency component of noise from acoustic quantification (AQ) echocardiographic images, we processed 800 parasternal short-axis images obtained from 10 study subjects. M-mode tracings were also obtained and used as gold standard for correlating the results from raw AQ and Fourier-filtered images. Left ventricular short-axis diameters measured from the raw AQ and Fourier-filtered data were compared with the M-mode diameters (r = 0.91, p < 0.001 for raw AQ; and r = 0.96, p < 0.001, for Fourier filtered images). Fractional shortening showed better correlation between Fourier-filtered images and M-mode (r -0.79, p < 0.03) versus raw AQ and M-mode (r = 0.33, p = 0.46). Beat-to-beat reproducibility was also found to be better for fractional area change (r = 0.82, p = 0.01 versus r = 0.66, p = 0.07), peak area filling rate (r = 0.87, p = 0.004 versus r = 0.62, p = 0.1), and peak area emptying rate (r = 0.99, p < 0.0001 versus r = 0.19, p < 0.7) for Fourier filtered versus raw AQ. Our results indicate that Fourier filtration of AQ data results in more accurate renresenfation of the true endocardial borders.
AB - To determine the accuracy of Fourier filtration in removing the high-frequency component of noise from acoustic quantification (AQ) echocardiographic images, we processed 800 parasternal short-axis images obtained from 10 study subjects. M-mode tracings were also obtained and used as gold standard for correlating the results from raw AQ and Fourier-filtered images. Left ventricular short-axis diameters measured from the raw AQ and Fourier-filtered data were compared with the M-mode diameters (r = 0.91, p < 0.001 for raw AQ; and r = 0.96, p < 0.001, for Fourier filtered images). Fractional shortening showed better correlation between Fourier-filtered images and M-mode (r -0.79, p < 0.03) versus raw AQ and M-mode (r = 0.33, p = 0.46). Beat-to-beat reproducibility was also found to be better for fractional area change (r = 0.82, p = 0.01 versus r = 0.66, p = 0.07), peak area filling rate (r = 0.87, p = 0.004 versus r = 0.62, p = 0.1), and peak area emptying rate (r = 0.99, p < 0.0001 versus r = 0.19, p < 0.7) for Fourier filtered versus raw AQ. Our results indicate that Fourier filtration of AQ data results in more accurate renresenfation of the true endocardial borders.
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U2 - 10.1016/S0894-7317(97)70067-1
DO - 10.1016/S0894-7317(97)70067-1
M3 - Article
C2 - 9168352
AN - SCOPUS:0031133249
SN - 0894-7317
VL - 10
SP - 310
EP - 319
JO - Journal of the American Society of Echocardiography
JF - Journal of the American Society of Echocardiography
IS - 4
ER -