螺旋CT多期扫描诊断肝脏局灶性结节增生研究

目的 探讨肝脏局灶性结节增生(FNH)的螺旋CT平扫和多期增强扫描表现特征,以提高CT对FNH的诊断准确性.资料与方法 回顾性分析16例经病理证实的FNH患者螺旋CT平扫及动脉期、门静脉期、延迟期增强扫描的资料.结果 16例患者16个FNH病灶中,平扫显示所有病灶均为略低密度,位于肝包膜下,其中14个可见更低密度瘢痕,从病灶中心向周围呈辐射状或不规则状.肿块实质呈"快进慢出"强化,中心瘢痕及辐射状分隔、假包膜"延迟强化",延迟期整个肿块密度趋于均匀一致.结论 平扫和多期增强螺旋CT扫描能全面显示FNH的病理特征及血流动力学特点,螺旋CT多期扫描有助于FNH的诊断及鉴别诊断.

Multi-phase Helical CT Diagnosis of Hepatic Focal Nodular Hyperplasia

Objective To investigate the appearances of hepatic focal nodular hyperplasia(FNH) on the precontrast and multiphase dynamic enhancement CT. Materials and Methods The CT data of 16 patients with FNH confirmed histopathologically were retrospectively analyzed. CT examination included the precontrast and the postcontrast scan, which divided into arterial phase, portal venous phase, delayed phase. Results On the precontrast images, all the 16 lesions were demonstrated as hypodense and located under liver sub-capsule. Of the 16 lesions, 14 lesions had hypodense scar area which radiated irregularly from the center to periphery. The masses were enhanced with "fast-in and slow-out" signs, and the centric scars and their radiated septations or pseudo-capsule were delayed enhancement, the density of whole mass turned to uniformity in delayed phase. Conclusion Multi-phase helical CT scan can comprehensively reflect the pathological characteristics and hemodynamic features of FNH, and it is of great value in differential diagnosing FNH.