Physical mechanism of inhomogeneous left ventricular echocontrast

Author

Scholle, F.-D. ; Uhlendorf, V. ; Fritzsch, T.

Volume

3

fYear

1994

fDate

Oct. 31 1994-Nov. 3 1994

Firstpage

1563

Abstract

Streaky contrast and cyclic variations are often seen in video images of hearts during ultrasonic examinations when using intravenous injection of a transpulmonary ultrasound contrast agent. Several suggestions have been made in the literature to explain these phenomena, e.g. destruction of contrast agent by blood pressure variations between systole and diastole or blood jets emerging from small veins in the myocard (Thebesian veins) into the heart cavity. However, the results of this study demonstrate that inhomogeneous contrast and cyclic variations bath mainly depend on the acoustical intensity (I_max) and on flow conditions inside the heart

Keywords

acoustic intensity; echocardiography; image resolution; image segmentation; medical image processing; B-mode image; acoustic pressure amplitude; acoustical intensity; cyclic variations; heart flow conditions; inhomogeneous left ventricular echocontrast mechanism; intravenous injection; streaky contrast; transpulmonary ultrasound contrast agent; video grey levels; video images; Biomedical signal processing; Echocardiography; Image region analysis; Image resolution;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE

Conference_Location

Cannes, France

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1994.401890

Filename

401890