Yoshiura T, Iwanaga S, Yamada K, Shrier D A, Patel U, Shibata D K, Numaguchi Y
Department of Radiology, University of Rochester, NY 14642, USA.
Radiology. 1998 May;207(2):385-8. doi: 10.1148/radiology.207.2.9577485.
To correlate the perirolandic low signal intensity seen on T2-weighted magnetic resonance (MR) images in neonates and infants with the anatomically located sensorimotor cortex.
Axial T2-weighted MR images of 146 consecutive patients less than 6 months old were reviewed. The sensorimotor cortex was located by identifying the central sulcus. Two independent readers attempted to identify the central sulcus using two anatomic methods independently and in combination. The location of the central sulcus was compared with that of the perirolandic low signal intensity.
Seventy-two normal hemispheres in 36 patients and 91 abnormal hemispheres in 47 patients showed clear perirolandic low signal intensity. The central sulcus was located anatomically in 70 and 72 normal hemispheres (97% and 100%, respectively) and 90 and 91 abnormal hemispheres (99% and 100%, respectively). In all normal hemispheres, the identified central sulcus correlated with the perirolandic low signal intensity. In contrast, an apparent mismatch was found in two hemispheres in a patient with Dandy-Walker syndrome.
The perirolandic low signal intensity seen on T2-weighted MR images is located exactly in the anatomic sensorimotor cortex in normal brains, whereas a mismatch can occur in abnormal brains.
将新生儿和婴儿T2加权磁共振（MR）图像上所见的中央旁低信号强度与解剖学定位的感觉运动皮层进行关联。
回顾了146例年龄小于6个月的连续患者的轴位T2加权MR图像。通过识别中央沟来定位感觉运动皮层。两名独立的阅片者尝试分别使用两种解剖学方法以及联合使用这两种方法来识别中央沟。将中央沟的位置与中央旁低信号强度的位置进行比较。
36例患者的72个正常半球和47例患者的91个异常半球显示出清晰的中央旁低信号强度。中央沟在解剖学上分别定位在70个和72个正常半球（分别为97%和100%）以及90个和91个异常半球（分别为99%和100%）。在所有正常半球中，识别出的中央沟与中央旁低信号强度相关。相比之下，在一名患有丹迪-沃克综合征的患者的两个半球中发现了明显的不匹配。
T2加权MR图像上所见的中央旁低信号强度在正常大脑中恰好位于解剖学感觉运动皮层，而在异常大脑中可能会出现不匹配。
