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首页> 外文期刊>Radiology >Discrimination of small hepatic hemangiomas from hypervascular malignant tumors smaller than 3 cm with three-phase helical CT.
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Discrimination of small hepatic hemangiomas from hypervascular malignant tumors smaller than 3 cm with three-phase helical CT.

机译：三相螺旋CT鉴别小于3 cm的高血管恶性肿瘤中的小肝血管瘤。

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PURPOSE: To compare the appearance of small hepatic hemangiomas at nonenhanced and contrast material-enhanced helical computed tomography (CT) with that of small (<3-cm) hypervascular malignant liver tumors and to evaluate the accuracy of multiphase helical CT for differentiating small hemangiomas from small hypervascular malignant tumors. MATERIALS AND METHODS: Radiologists reviewed multiphase helical CT liver images in 86 patients with 37 hemangiomas and 49 malignant liver tumors. They evaluated lesion type and degree of enhancement for change from arterial to portal venous phase. They rated their confidence in the discrimination of hemangiomas from malignant tumors. RESULTS: At arterial phase CT, enhancement similar to aortic enhancement was observed in 19%-32% of hemangiomas and 0%-2% of malignant tumors; globular enhancement, in 62%-68% and 4%-12%, respectively. At portal venous phase CT, enhancement similar to blood pool enhancement was observed in 43%-54% of hemangiomas and 4%-14% of malignant tumors; globular enhancement, in 46%-49% and 0%-2%, respectively. For all readers and all phases of enhancement, the area under the receiver operating characteristic curves was 0.81-0.87, indicating that inherent accuracy of CT is high and that there was no significant difference (P >.28) in overall accuracy. Readers diagnosed hemangiomas with 47%-53% mean sensitivity with all enhancement phases and diagnosed malignant lesions with 95% mean specificity. CONCLUSION: Small hemangiomas frequently show atypical appearances at CT. Two-phase helical CT does not improve sensitivity but does improve specificity for differentiating hemangiomas from hypervascular malignant tumors.
机译：目的：比较在未增强和对比材料增强的螺旋计算机体层摄影术（CT）与小的（<3 cm）高血管恶性肝肿瘤的小肝血管瘤的表现，并评估多相螺旋CT鉴别小血管瘤的准确性来自小高血管恶性肿瘤。材料与方法：放射科医生回顾了86例37例血管瘤和49例恶性肝肿瘤患者的多相螺旋CT肝脏图像。他们评估了病变类型和增强程度，以了解从动脉期到门静脉期的变化。他们对他们从恶性肿瘤中鉴别出血管瘤的信心表示满意。结果：在动脉期CT，在19％-32％的血管瘤和0％-2％的恶性肿瘤中观察到了与主动脉增强相似的增强。球形增强分别达到62％-68％和4％-12％。在门静脉期CT上，在43％-54％的血管瘤和4％-14％的恶性肿瘤中观察到类似于血池增强的增强。球状增强，分别为46％-49％和0％-2％。对于所有阅读器和增强的所有阶段，接收器工作特性曲线下的面积为0.81-0.87，这表明CT的固有精度很高，并且总体精度没有显着差异（P> .28）。读者诊断出血管瘤在所有增强阶段的平均敏感性为47％-53％，诊断为恶性病变的平均特异性为95％。结论：小血管瘤常在CT表现为非典型表现。两阶段螺旋CT不能提高敏感性，但可以提高区分血管瘤和高血管恶性肿瘤的特异性。

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