Comput Methods Programs Biomed - Automated septum thickness measurement--a Kalman filter approach.

Tópicos

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Resumo

Interventricular septum thickness in end-diastole (IVSd) is one of the key parameters in cardiology. This paper presents a fast algorithm, suitable for pocket-sized ultrasound devices, for measurement of IVSd using 2D B-mode parasternal long axis images. The algorithm is based on a deformable model of the septum and the mitral valve. The model shape is estimated using an extended Kalman filter. A feasibility study using 32 unselected recordings is presented. The recordings originate from a database consisting of subjects from a normal healthy population. Five patients with suspected hypertrophy were included in the study. Reference B-mode measurements were made by two cardiologists. A paired t-test revealed a non-significant mean difference, compared to the B-mode reference, of (mean?SD) 0.14?1.36 mm (p=0.532). Pearson's correlation coefficient was 0.79 (p<0.001). The results are comparable to the variability between the two cardiologists, which was found to be 1.29?1.23 mm (p<0.001). The results indicate that the method has potential as a tool for rapid assessment of IVSd.

Resumo Limpo

interventricular septum thick enddiastol ivsd one key paramet cardiolog paper present fast algorithm suitabl pockets ultrasound devic measur ivsd use d bmode parastern long axi imag algorithm base deform model septum mitral valv model shape estim use extend kalman filter feasibl studi use unselect record present record origin databas consist subject normal healthi popul five patient suspect hypertrophi includ studi refer bmode measur made two cardiologist pair ttest reveal nonsignific mean differ compar bmode refer meansd mm p pearson correl coeffici p result compar variabl two cardiologist found mm p result indic method potenti tool rapid assess ivsd

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