Seibert J J, Avva R, Hronas T N, Mocharla R, Vanderzalm T, Cox K, Kinder D, Lidzy B, Knight K L
Department of Radiology, Arkansas Children's Hospital, Little Rock 72202, USA.
Radiographics. 1998 Jul-Aug;18(4):879-90. doi: 10.1148/radiographics.18.4.9672972.
In pediatric neurosonography, conventional color Doppler imaging has been the primary adjunct to routine gray-scale imaging. Power Doppler sonography is a relatively recent development that does not have the limitations of conventional color Doppler ultrasound. The power Doppler technique measures the energy of moving red blood cells instead of the velocity and direction of flow. Advantages of this technique include increased sensitivity for identifying flow in slow-flow states, more complete evaluation of a vessel, and more accurate evaluation of the course of the vessel. Power Doppler sonography is helpful in evaluation of the neonatal brain in a variety of clinical situations: identifying the exact locations of extraaxial fluid collections, differentiating intraventricular clot from normal choroid plexus, detecting intraventricular hemorrhage, and demonstrating asymmetries in cerebral perfusion. However, in certain difficult cases, use of both conventional color Doppler sonography and power Doppler sonography produces increased diagnostic accuracy because these techniques furnish complementary information.
在儿科神经超声检查中，传统彩色多普勒成像一直是常规灰阶成像的主要辅助手段。能量多普勒超声是一项相对较新的技术，它没有传统彩色多普勒超声的局限性。能量多普勒技术测量的是移动红细胞的能量，而非血流速度和方向。该技术的优点包括对慢血流状态下血流识别的敏感性增加、对血管的评估更完整以及对血管走行的评估更准确。能量多普勒超声在多种临床情况下有助于评估新生儿脑：确定轴外液体积聚的确切位置、区分脑室内血凝块与正常脉络丛、检测脑室内出血以及显示脑灌注的不对称性。然而，在某些困难病例中，同时使用传统彩色多普勒超声和能量多普勒超声可提高诊断准确性，因为这些技术可提供互补信息。
