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Abstract: Objectives: To directly compare the quality of harmonic imaging (HI) and fundamental imaging (FI) in fetal echocardiography and to determine any differences in image quality between the two modalities. Methods: Fetal echocardiograms were performed with the use of FI and HI in 58 fetuses, image quality and visualization of left and right atria, left and right ventricles, mitral and tricuspid valves, aortic and pulmonary valves, left and right ventricular outflow tracts were evaluated and compared between FI and HI. Results: Mean HI scores were higher than mean FI scores (2.73±0.43 vs 2.16±0.69, P<0.001)for all the cardiovascular structures evaluated. Compared with FI, HI improved the image quality and visualization of fetal cardiac structures in subjects with both good (2.73±0.43 vs 2.88±0.32, P<0.001) and suboptimal (1.65±0.41 vs 2.58±0.47, P<0.001) echocardiographic windows. The interobserver correlation coefficient for the grading scores was 0.74 (P<0.001). Conclusions: harmonic imaging enhances and improves the image quality of fetal echocardiography; and has important potential role in cardiac imaging in the fetus.

[1]Kasprzak, J. D., Paelinck, B., Ten Cate, F. J., Vletter, W. B., de Jong, N., Poldermans, D., Elhendy, A., Bouakaz, A. and Roelandt, J. R.T.C., 1999. Comparison of native and contrast-enhanced harmonic echocardiography for visualization of left ventricular endocardial border. Am J Cardiol, 83:211-217.

[2]Kornbluth, M., Liang, D.H., Paloma, A. and Schnittger, I., 1998. Native tissue harmonic imaging improves endocardial border definition and visualization of cardiac structures. J Am Soc Echocardiogr, 11:693-701.

[3]Main, M.L., Asher, C.R., Rubin, D.N., Odabashian J.A., Cardon, L.A., Thomas, J. D. and Klein A.L., 1999. Comparison of tissue harmonic Imaging with contrast (sonicated albumin) echocardiography and Doppler myocardial imaging for enhancing endocardial border resolution. Am J Cardiol, 83:218-222.

[4]Oberhansli, I., Extermann, P., Jaggi, E. and Pfizenmaier, M., 2000. Fetal echocardiography in pregnancies of women with congenital heart disease--clinical utility and limitations. Thorac Cardiovasc Surg, 48:323-327.

[5]Rocchi, G., de Jong, N., Galema. T.W., Galema, T. W., Kasprzak, J.D. and Ten Cate, F.J., 1999. Effect of harmonic imaging without contrast on imaging quality of transesophageal echocardiography. Am J Cardiol, 84:1132-1134.

[6]Spencer, K.T., Bednarz, J., Rafter, P.G., Korcarz, C. and Lang, R.M., 1998. Use of harmonic imaging without echocardiographic contrast to improve two-dimensional image quality. Am J Cardiol, 82:794-799.

[7]Thomas, J.D. and Rubin, D.N., 1998. Tissue harmonic imaging: why does it work? J Am Soc Echocardiogr, 11:803-808.

[8]Ward, B., Kaker, A.C. and Humphrey, V.F., 1997. Nonlinear propagation applied to the improvement of resolution in diagnostic medical ultrasound. J Acoust Soc Am, 101:143-154.

[9]Yuan,X.P., Liu, W.P.,Kuan,C.S., Xing, J.F., Li, T.L., Chen, W. and Yang, Y.S., 1998. Clinical study of native tissue harmonic imaging on improving two-dimensional image quality. Chinese J Ultrasound Med, 15:907-910 (in Chinese).