Continuous and pulsed Doppler power spectral density in steady flow: An experimental investigation

被引：3

作者：

Guiot, C

Saccomandi, F

Todros, T

机构：

[1] IST ELETTROTECNICO NAZL GALILEO FERRARIS,I-10125 TURIN,ITALY

[2] UNIV TURIN,IST GINECOL OSTETRICIA,TURIN,ITALY

来源：

MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING | 1997年 / 35卷 / 02期

关键词：

Doppler power spectral density; steady flow; spectral broadening; flow phantom; flow profile;

D O I：

10.1007/BF02534146

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Powder spectral density (PSD) was measured in steady flow conditions in continuous-wave (CW) and pulsed wave (PW) ultrasound Doppler mode. The estimated PSD of the Doppler backscattered signal showed discrepancies from the expected value which was more severe in the PW mode than in the CW mode. Intrinsic spectral broadening (ISB) was significantly larger in PW mode than in the CW mode. Interpretation of Doppler PSD measurement results required caution. Artefacts due to intrinsic random effects related to standard signal manipulations and experimental conditions were severe and mode-dependent, and significantly affected the estimated flow parameters.

引用

页码：146 / 150

页数：5

共 12 条

[1] CALCULATION OF DOPPLER SPECTRAL POWER-DENSITY FUNCTIONS [J].