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J Am Coll Cardiol, 1989; 14:666-671
© 1989 by the American College of Cardiology Foundation
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Quantitative texture analysis in two-dimensional echocardiography: application to the diagnosis of myocardial amyloidosis

B Pinamonti, E Picano, EM Ferdeghini, F Lattanzi, G Slavich, L Landini, F Camerini, A Benassi, A Distante, and A L'Abbate

Divisione di Cardiologia, Ospedale Maggiore, Trieste, Italy.

Qualitative and subjective analysis of two-dimensional echocardiographic images of the myocardial wall allows one to identify amyloid heart disease; the quantitative analysis of regional image texture might be an accurate method to differentiate normal from amyloid myocardial structures. To test this hypothesis, two-dimensional echocardiograms of nine normal subjects and six patients with histologically documented amyloid heart disease were evaluated. Quantitative texture measurements of the first order (mean gray level, skewness, kurtosis, energy and entropy) overlapped between the two groups. Among the second order statistics variables, entropy was significantly and consistently higher in amyloid versus normal patient data (septum in parasternal long-axis view: 6.3 +/- 0.3 versus 5.9 +/- 0.4; septum in apical four chamber view: 6.2 +/- 0.2 versus 5.8 +/- 0.3). Therefore, amyloid-involved myocardial walls show ultrasound image texture alterations that may be quantified with digital image analysis techniques.


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