Maeda H, Hayashi N, Toyooka N, Endoh S, Hayashi R
Department of Radiological Technology, College of Medical Technology, Nagoya University, Japan.
Radiat Med. 1997 Jan-Feb;15(1):17-22.
Several criteria have been used for differentiating hepatic cavernous hemangioma from other tumors at magnetic resonance imaging (MRI). Included are signal intensity and lobulation of the tumor. We counted the frequency of presence of lobulation of liver hemangiomas on T2-weighted images (T2WI), and measured the signal-intensity ratio (SIR) on T1-weighted images (T1WI) and on T2WI with a 0.9 mm x 0.9 mm pixel size using a 0.5 T magnetic resonance system. Eighty-three cavernous hemangiomas in 44 patients and 67 malignant tumors in 44 patients were retrospectively studied. Seventy-five of the cavernous hemangiomas (90%) exhibited lobules of various sizes, and four of the malignant tumors (6%) exhibited lobulations. The cavernous hemangiomas had a significantly higher SIR than the malignant tumors on T2WI: 3.0 +/- 0.7 and 1.9 +/- 0.8 (p < 0.001), respectively. The presence of lobulation together with a high SIR was a useful measure for differentiating cavernous hemangiomas from other liver tumors.
在磁共振成像（MRI）中，已经使用了多种标准来区分肝海绵状血管瘤与其他肿瘤。这些标准包括肿瘤的信号强度和分叶情况。我们统计了肝血管瘤在T2加权图像（T2WI）上出现分叶的频率，并使用0.5T磁共振系统，在像素大小为0.9mm×0.9mm的T1加权图像（T1WI）和T2WI上测量信号强度比（SIR）。对44例患者的83个海绵状血管瘤和44例患者的67个恶性肿瘤进行了回顾性研究。75个海绵状血管瘤（90%）呈现出大小各异的小叶，4个恶性肿瘤（6%）呈现出分叶。在T2WI上，海绵状血管瘤的SIR显著高于恶性肿瘤：分别为3.0±0.7和1.9±0.8（p<0.001）。分叶的存在以及高SIR是区分海绵状血管瘤与其他肝脏肿瘤的有用指标。
