论文部分内容阅读
本文报告运用实验性血流模型探讨彩色多普勒能量显像（ＣＤＥ）的特征。ＣＤＥ可显示内径０．７ｍｍ管道内０．８ｃｍ／ｓ的低速血流，而彩色多普勒血流图（ＣＤＩ）能检测的最低流速为１．５ｃｍ／ｓ。在声束夹角从３３°～５２°的变化范围内ＣＤＥ的敏感性基本不受影响。而在ＣＤＩ必须将血流速度提高约４倍才能达到同一显示水平。当声束夹角达到９０°时，ＣＤＥ的敏感性明显下降，只能在高速血流下（８３．４ｃｍ／ｓ）检测到信号。血液中红细胞数减少时ＣＤＥ的显像能力降低，对角度的依赖性增加，与ＣＤＩ已无明显差异。本研究对临床应用ＣＤＥ提供了有一定参考价值的资料
This article reports the use of experimental blood flow models to explore the characteristics of color Doppler energy imaging (CDE). The CDE shows a 0.8 cm / s low-velocity blood flow in a 0.7 mm ID 0.7-cm tube, while the CDI can detect a minimum flow rate of 1.5 cm / s. The sensitivity of CDE in the range of 33 ° ~ 52 ° is basically unaffected. In the CDI, blood flow must be increased by about 4 times in order to achieve the same display level. Sensitivity of CDE decreased significantly when the included angle of the sound beam reached 90 °, and the signal was only detected under high velocity blood flow (83.4 cm / s). CDE decreased the number of red blood cells in the blood when the ability to reduce the dependence on the angle increased, and CDI no significant difference. This study provides some useful information for clinical application of CDE