[The spectral broadening correction in peak blood flow velocity estimation].
Numerous effects contribute to the ultimate shape of output power spectrum in Doppler ultrasound blood flow measurement. The output Doppler spectrum is broadened by physiological sources related to blood flow velocity as well as some unexpected broaden components due to the nonideal acoustical factors of the ultrasound unit. Therefore, by using the classical Doppler equation, it will lead to overestimation of the maximum velocity in conventional Doppler blood flow measurement. In this paper, we present a modified Doppler equation which takes the intrinsic spectral broadening into account. The foundation of this method is introduced and the results of the in vivo experiment using this corrected equation are reported.
Qian
M
M
Department of Biomedical Engineering, Xi'an Jiaotong University, Xi'an 710049.
Li
J
J
Wan
M
M
D000465:Algorithms; D001783:Blood Flow Velocity; D001808:Blood Vessels / Q000000981:diagnostic imaging / Q000502:physiology*; D006801:Humans; D012815:Signal Processing, Computer-Assisted; D018608:Ultrasonography, Doppler / Q000379:methods*; D018084:Ultrasonography, Interventional