Automated septum thickness measurement-A Kalman filter approach

  • Authors:

  • Sten Roar Snare;Ole Christian MjøLstad;Fredrik Orderud;HåVard Dalen;Hans Torp

  • Affiliations:

  • Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway;Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway and Department of Cardiology, St. Olavs University Hospital, Trondheim, Norw ...;GE Vingmed Ultrasound, Oslo, Norway;Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway and Levanger Hospital, Nord-Trondelag Health Trust, Levanger, Norway;Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway

  • Venue:
  • Computer Methods and Programs in Biomedicine
  • Year:
  • 2012

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Abstract

Abstract: 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+/-1.36mm (p=0.532). Pearson's correlation coefficient was 0.79 (p