Hosoda K, Tamaki N, Masumura M, Matsumoto S, Maeda F
Department of Neurosurgery, Kobe University School of Medicine, Japan.
J Neurosurg. 1987 Nov;67(5):677-83. doi: 10.3171/jns.1987.67.5.0677.
Magnetic resonance imaging (MRI) and computerized tomography (CT) scans of 18 patients with 20 chronic subdural hematomas were compared. In many ways, MRI was superior to CT for demonstrating the hematomas. In general, chronic subdural hematomas were hyperintense on both T1- and T2-weighted MRI. The T1 values of chronic subdural hematomas were significantly shorter than gray matter values and significantly longer than white matter values. The T2 values were significantly longer than both gray matter and white matter values. These findings were consistent with previous reports. However, six hematomas (30%) were iso- or hypointense on T1-weighted images. Possible mechanisms responsible for the difference in intensity of chronic subdural hematoma on MRI are discussed, and the important role of methemoglobin formation is emphasized.
对18例患有20个慢性硬膜下血肿的患者进行了磁共振成像（MRI）和计算机断层扫描（CT）检查并比较。在许多方面，MRI在显示血肿方面优于CT。一般来说，慢性硬膜下血肿在T1加权和T2加权MRI上均为高信号。慢性硬膜下血肿的T1值明显短于灰质值，明显长于白质值。T2值明显长于灰质和白质值。这些发现与先前的报告一致。然而，6个血肿（30%）在T1加权图像上呈等信号或低信号。讨论了慢性硬膜下血肿在MRI上信号强度差异的可能机制，并强调了高铁血红蛋白形成的重要作用。
