PMID: 9169998May 1, 1997Paper

Use of Fourier shape descriptors to improve the reproducibility of echographic measurements of arterial intima-media thickness

Journal of Hypertension
G BruschiA Borghetti

Abstract

A major source of error in the longitudinal assessment of the intima-media thickness (IMT) is the difficulty in retrieving the same echographic view of the vessel. To present a method for increasing the reproducibility of IMT measurements by ultrasound in large arteries. The Fourier descriptor is a well-known means of describing an object's shape. By means of the discrete Fourier transform (DFT), the shape was represented in a frequency domain; the computational advantages of the DFT then permitted a measure of unlikeness between different shapes (the 'distance' measure; DM) to be defined and used as a criterion for reproducing the contour. When the sonographer compared successive images of a complex vascular segment, like the carotid bifurcation, the identity of the echographic cut was deduced from the identity of the vessel's contour. The best match of the baseline image was the view that minimized the contour DM. Preliminary studies in the carotid artery bifurcations of eight subjects showed that the DM responds to systematic variations in the ultrasound interrogation angle and reveals minimal changes in transducer position. Duplicate scans of 12 subjects were performed by three sonographers with different strategies for acq...Continue Reading

References

Jul 1, 1992·Journal of Hypertension. Supplement : Official Journal of the International Society of Hypertension·P J TouboulP Ducimetière
Feb 1, 1992·Arteriosclerosis and Thrombosis : a Journal of Vascular Biology·J PerssonG Berglund
Jan 1, 1992·Arteriosclerosis and Thrombosis : a Journal of Vascular Biology·I WendelhagJ Wikstrand
Nov 1, 1994·Journal of Internal Medicine·C D FurbergT E Craven
Aug 1, 1994·Stroke; a Journal of Cerebral Circulation·D BaldassarreC R Sirtori

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Citations

Jan 8, 2000·Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas·F L PlavnikO L Ramos
Feb 1, 2002·Journal of Hypertension·Alain SimonJaime Levenson

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