Analysis of Ventricular Wall Motion Using Color-Coded Tissue Doppler Imaging System

Autor:	Norio Tanaka, Nobuo Yamazaki, Yoshitaka Mine, Akihiro Sano, Masakazu Yamagishi, Kunio Miyatake, Makoto Hirama
Rok vydání:	1994
Předmět:	Physics Pulse repetition frequency Acoustics Ventricular wall General Engineering General Physics and Astronomy Frame rate Doppler imaging Motion (physics) symbols.namesake Transducer symbols Wall motion Doppler effect
Zdroj:	Japanese Journal of Applied Physics. 33:3141
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.33.3141
Popis:	We developed a new color Doppler system by which Doppler signals associated with tissue motion can be determined, and called it the tissue Doppler imaging (TDI) system. Using high-speed scanning, the frame rate was 26–38 F/s, and the pulse repetition frequency was 4.5–6.0 kHz. Under these conditions, the lowest measurable velocity was improved to 2 mm/s. Wall motion toward the transducer was coded as red, and that away from the transducer, as blue. To examine the accuracy and validity of the measured velocity of ventricular wall motion, we performed in vitro and in vivo studies. The results demonstrate that the present TDI system accurately represents the tissue velocity, and is applicable for creating two-dimensional images of the ventricular wall motion in real time, facilitating the visual assessment of abnormal ventricular wall motion.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::19aef50c57b72bd2b78f7d10a9112d1a https://doi.org/10.1143/jjap.33.3141 Zobrazit plný text záznamu