DiPietro M A, Brody B A, Teele R L
AJR Am J Roentgenol. 1986 May;146(5):1067-72. doi: 10.2214/ajr.146.5.1067.
Cranial sonography in neonates almost always reveals a hyperechoic "blush" just posterior and superior to the ventricular trigones on parasagittal views. This normal increased echogenicity resembles fine brush strokes. It is probably caused by the interface of numerous parallel fibers that are nearly perpendicular to the longitudinal axis of a sonographic beam passing through the anterior fontanelle. The same echogenicity is not seen on sonograms obtained through the posterior fontanelle because with that angulation the long axis of the sonographic beam and the fiber tracts are nearly parallel. Sonographic-pathologic correlation in 28 autopsy cases showed that abnormal, dense, globular, coarse, peritrigonal echogenicity was due to periventricular leukomalacia with hemorrhage. Cases with nonhemorrhagic periventricular leukomalacia or perinatal telencephalic leukoencephalopathy demonstrated the normal peritrigonal hyperechogenicity.
新生儿头颅超声检查在矢状旁视图上几乎总能在室间三角后方和上方发现一个高回声“红晕”。这种正常的回声增强类似于精细的笔触。这可能是由许多几乎垂直于穿过前囟的超声束纵轴的平行纤维界面引起的。通过后囟获得的超声图像上看不到相同的回声，因为在那个角度，超声束的长轴和纤维束几乎平行。28例尸检病例的超声与病理相关性显示，异常、致密、球形、粗糙的三角周回声是由于脑室周围白质软化伴出血所致。非出血性脑室周围白质软化或围生期端脑白质脑病病例表现为正常的三角周高回声。
