ceo88
不可能是伪影，别讲笑话。

2-year-old boyunderwent abdominal magnetic resonance imaging (MRI) after livertransplantation. The patient had been born prematurely at a gestational age of24 weeks 5 days. At 18 months of age, abdominal fullness developed. At thattime, an ultrasound examination showed a hepatic mass, and laboratory-testresults showed an elevated alpha-fetoprotein level. Further evaluationconfirmed a diagnosis of hepatoblastoma, for which he received chemotherapy andsubsequently underwent liver transplantation. MRI scans obtained 1 month afterthe liver transplantation highlight the two pathways of splenic perfusion.Three sequential images obtained after the administration of intravenouscontrast material show the contrast material mostly in the arterial system first(Panel A), then most intensely in the portal veins (Panel B), and finally inthe hepatic veins (Panel C). When imaging is performed rapidly, the regions offast and slow circulation in the spleen can be differentiated. Before thecontrast material distributes fully within the spleen, the regions of fastcirculation transiently show higher signal (arrow) than do the regions of slowcirculation (dark spirals, dashed arrow). The primary purpose of the imagingwas to assess the patient after transplantation, but these images also allow usto appreciate normal physiology. Two years after transplantation, the patientis doing well.

2岁的男孩接受肝移植术后腹部磁共振成像（MRI）。病人已在胎龄24周5天早产。18个月的年龄时腹部胀满。当时，超声检查发现肝肿块，实验室检查结果表明：甲胎蛋白升高。进一步的检查证实为肝母细胞瘤，接受化疗后行肝移植。磁共振成像扫描是在脾脏双路径灌注肝移植（liver transplantation highlight the twopathways of splenic perfusion）1个月后进行的。静脉注射造影剂后采集三序列动脉期、门脉期及静脉期图像。在快速成像过程中，可以明显区分脾的快、慢循环区。在增强剂分布于全部脾脏之前，快循环区相对于慢循环区（深色的螺旋线，虚线箭头）呈现瞬时表现为高信号。成像的主要目的是评估移植后的病人，但这些图像也让我们认识到正常的生理。患者移植后两年，生活得很好。

关键是这个手术“liver transplantation highlight the twopathways of splenic perfusion”是怎么做的，有移植的专家可以解释一下。