谐波能量显像评价正常犬肝脏声学造影的实验研究

目的 评价谐波能量显像（ＨＰＩ）在正常肝脏声学造影中的造影增强效果，并与彩色多普勒血流显像（ＣＤＦＩ）进行对比。方法 ４只健康杂种犬经外周静脉注射氟碳声学造影剂，分别用ＨＰＩ和ＣＤＦＩ观察肝脏。视觉判断彩色增强效果和伪像分级。结果 造影后，肝脏ＨＰＩ与ＣＤＦＩ均有３级强烈彩色信号增强，但ＣＤＦＩ有严重的３级“彩色怒放”伪像，而ＨＰＩ的彩色伪像均为１级。结论 ＨＰＩ在声学造影嗵较起初地反映肝脏血流灌

Assessment of normal liver contrast ultrasonography with harmonic power imaging

Objective To assess normal liver contrast color enhancement using harmonic power imaging (HPI), comparative studies between HPI and color Doppler flow imaging (CDFI) were performed. Methods Four normal dogs were imaged with HPI and CDFI after intravenously injection of contrast agent at 0.02 ml/kg. The subjective scores of color enhancement and artifacts were estimated. Results There were significant color enhancement (Grade 3) both in HPI and CDFI imaging of liver after contrast., but severe (Grade 3) color blooming artifacts always appeared in CDFI comparing to mild (Grade 1) artifacts in HPI. Conclusions Harmonic power imaging is better than CDFI in achieving actual liver perfusion imaging and eliminating color blooming artifacts in microbubbles contrast.