螺旋CT多期增强扫描诊断早期肝癌

目的：分析早期肝癌的螺旋ＣＴ多期增强扫描的表面特征，评价其应用价值。方法：１８例经手术病理或临床证实的早期肝癌病人，全部接受螺旋ＣＴ多期增强扫描检查，以双盲法分析其各期的ＣＴ表现。结果：１８例中发现２１个病灶。平扫呈低密度或等密度；肝动脉期８５．７１％均匀或不均匀强化，１４．２９％无明显强化，但显示肿瘤血管；门脉期呈低或等密度；延迟扫描全部为低密度。病灶密度变化的主要形式是“低－高－低－低”的模式。结论：螺旋ＣＴ多期增强扫描能反映早期肝癌的血供变化特点，从而为本病的诊断和治疗提供了可靠的影像学依据。

Evaluation of multi phase helical dynamic CT in the diagnosis of early hepatocellular carcinoma

Objective: To analyze the characteristic appearances of early hepatocellular carcinoma in multi phase helical CT study, and assess the value of this method. Methods: Multi phase helical CT scan of the liver was done in 18 cases with confirmed hepatocellular carcinoma. The CT findings were independently reviewed in a double blind method by more than two radiologists. Results: Altogether 21 lesions were found in 18 cases. In plain CT the lesions were hypodense or isodense areas. After contrast enhancement, 85.71% lesions showed regular or irregular hyperdense enhancement while 14.29% demonstrated tumor vessels within the lesions during arterial phase, then they became hypodense or isodense nodules during portal phase, and all to be hypodense during delay phase. The prevalence model of density changes was low hyper low low pattern. Conclusions: Multi phase helical CT could reflect the blood supply of the early hepatocellular carcinoma, it provids reliable imaging for the diagnosis and treatment of the disease.