Semelka R C, Brown E D, Ascher S M, Patt R H, Bagley A S, Li W, Edelman R R, Shoenut J P, Brown J J
Department of Radiology, University of North Carolina Medical Center, Chapel Hill 27599-7510.
Radiology. 1994 Aug;192(2):401-6. doi: 10.1148/radiology.192.2.8029404.
To define the appearance of hepatic hemangiomas on T2-weighted and serial gadolinium-enhanced gradient-echo magnetic resonance (MR) images.
In four university hospitals, with 1.0- or 1.5-T MR imaging, T2-weighted and T1-weighted gradient-echo images were obtained in 66 adult patients before and at 1, 45, and 90 seconds and 10 minutes after injection of a gadolinium chelate. Hemangiomas were categorized as small (< 1.5-cm-diameter), medium (1.5-5.0-cm), and large (> 5.0-cm) tumors.
In all, 154 hemangiomas were depicted (81 small, 56 medium, and 17 large tumors). All 154 lesions were hyperintense on T2-weighted images. Three patterns of contrast enhancement were observed: (a) uniform enhancement at 1 second (35 of 81 small lesions and no medium or large lesions), (b) peripheral nodular enhancement progressing centripetally to uniform enhancement (75 of all 154 lesions), and (c) peripheral nodular enhancement with persistent hypointensity centrally (44 of all 154 lesions, including 16 of 17 large lesions).
Three patterns of enhancement of hemangiomas were observed. High signal intensity on T2-weighted images provided complementary information.
明确肝血管瘤在T2加权及系列钆增强梯度回波磁共振（MR）图像上的表现。
在四家大学医院，采用1.0或1.5T MR成像，对66例成年患者在注射钆螯合物前及注射后1秒、45秒、90秒和10分钟获取T2加权和T1加权梯度回波图像。肝血管瘤被分为小（直径<1.5cm）、中（1.5 - 5.0cm）和大（>5.0cm）肿瘤。
共显示154个肝血管瘤（81个小肿瘤、56个中肿瘤和17个大肿瘤）。所有154个病灶在T2加权图像上均为高信号。观察到三种对比增强模式：（a）1秒时均匀增强（81个小病灶中的35个，无中或大病灶），（b）周边结节状增强向心性进展为均匀增强（154个病灶中的75个），（c）周边结节状增强且中心持续低信号（154个病灶中的44个，包括所有17个大病灶中的16个）。
观察到肝血管瘤的三种增强模式。T2加权图像上的高信号强度提供了补充信息。
