磁共振成像技术在原发性肝癌诊断中的临床应用价值

目的分析和研究原发性肝癌患者磁共振成像(MRI)表现,评价MRI技术在原发性肝癌诊断中的价值。方法对68例经手术、病理及临床随访最终诊断的原发性肝癌患者行MRI平扫及动态增强扫描检查,观察分析MRI表现。结果 MRI平扫显示68例患者肿瘤病灶T1WI上有低、中、高3种不同表现,其中高26例,中21例,低21例。主瘤周围常有单个或多个结节影,T1WI为低信号,T2WI为高信号。MRI动态增强扫描显示病灶明显强化,52例瘤体动脉期有明显强化,为不均匀、分房状强化。门脉期肝实质强化达到峰值期,而原发性肝细胞癌的信号已经下降,即"快进快出"。对于单个癌结节最大直径不超过3 cm或2个癌结节直径之和不超过3 cm的患者,MRI平扫均表现为T1WI呈低信号,T2WI为高信号,且均呈混浊性信号;动态增强扫描表现为"快进快出"的混浊信号。对于直径≥3 cm的肝癌,动脉期病灶密度呈混浊性增高,门脉期密度下降呈混杂低密度,平衡期病灶呈更低的混杂密度,同时看到病变区明显的肝血管床破坏。结论 MRI技术可以清晰地显示肿瘤内部结构、包膜、子灶及血管受侵情况,对显示子瘤和瘤栓有一定的价值,当患者特别是乙肝患者出现肝区疼痛、肝大、食欲减退、乏力消瘦等表现时,应及时进行MRI扫描确诊,有助于原发性肝癌的诊断,值得在临床中应用。

Clinical application value of magnetic resonance imaging in diagnosis of primary hepatic carcinoma

Objective To analysis the magnetic resonance imaging(MRI) performance of patients with primary liver cancer and evaluate the value of MRI in the diagnosis of primary liver cancer.Methods MRI scanning and paramagnetic enhanced scan of 68 cases were received,final diagnosis of primary liver cancer through surgical,pathology and clinical follow-up,then their MRI performance were observed and analyzed.Results Sixty-eight patients showed lesions on T1WI in high,moderate and low 3 different performances,in which ...