PMID: 2093752Jan 1, 1990Paper

On-line angle correction of color flow mapping images using a personal computer

Journal of cardiology
S KyoR Omoto

Abstract

To quantitatively assess flow area or kinetic energy in color flow mapping (CFM), angle correction, which has been totally ignored using current systems, is now considered indispensable. To reconstruct flow images using angle-corrected velocity mapping, we incorporated a personal computer (NEC PC-LT) in the cine-memory of a CFM system (Aloka SSD-870). To demonstrate the effect of angle correction on CFM, the maximum left ventricular diastolic flow images were obtained in seven normal adults using the apical long-axis views where the angle of incidence was less than 10 degrees, and the parasternal long-axis view, where the angle of incidence was between 40 and 60 degrees. A 3.5 MHz probe with a 4 KHz pulse repetition frequency at a frame rate of 10/sec was used. Flow area and kinetic energy of the original and angle correction images in the aliased parts and the total flow areas were calculated and expressed as percent values of the control (color correction image of total flow area in the apical view). The total flow area of the original image in the apical view was 96.4% and 87.2% in the parasternal view, or 98.6% by effective angle correction, and the kinetic energy of the original image in the apical view was 94.0% and 58.8%...Continue Reading

Related Concepts

Related Feeds

Arrhythmia

Arrhythmias are abnormalities in heart rhythms, which can be either too fast or too slow. They can result from abnormalities of the initiation of an impulse or impulse conduction or a combination of both. Here is the latest research on arrhythmias.

© 2021 Meta ULC. All rights reserved