Ultrasound is a term used to describe acoustic waves of higher frequency than audible sound. The best known traditional application of ultrasound in cardiology is two-dimensional echocardiography. In this modality, reflected sound from tissue interfaces is used to construct an image of the cardiac structures under investigation. Doppler ultrasound uses the backscattered signals from moving red blood cells to measure blood flow velocity.
KeywordsPulse Repetition Frequency Ultrasonic Pulse Ultrasonic Signal Backscatter Signal Ultrasonic Beam
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- 1.Angelsen BA. Analog estimation of the maximum frequency of Doppler spectra in ultrasonic velocity measurements. Report 76–2 lw, Div. of Engineering Cybernetics, Norwegian Inst of Technology, Univ of Trondheim, Norway (1976)Google Scholar
- 2.Baker DW. Two-dimensional echo imaging and pulsed Doppler blood flow detection: A comprehensive approach to cardiovascular diagnosis. In Cardiovascular Diagnosis by Ultrasound, edited by Hanrath P, Bleifeld W, Sououet J, Martinus Nijhoff, 1982Google Scholar
- 3.Snider AR, Stevenson JG, French JW, et al. Comparison of high pulse repetition frequency and continuous wave Doppler echocardiography for velocity measurements and gradient prediction in children with valvular and congenital heart disease. J Am Coll Cardiol 1986Google Scholar
- 5.Chapman JV. Clinacal Evaluation of the Doppler Power Spectrum. Eur Rev orBiomed Tech 8, 3; 168,1986Google Scholar
- 6.Chapman JV, Brun P, Meguira A. Initial Clinical Evaluation of a Phased Annular Array Color Flow Mapping System. Int Cong on Card Doppler, Kyoto; 161, 1986Google Scholar
- 7.Hatle L, Angelsen B. Doppler Ultrasound In Cardiology. Lea & Febiger, 1982Google Scholar