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目的分析急性胰腺炎(以下简称AP)病变在MRI各脉冲序列及CT的表现,了解不同MRI序列及CT显示各种AP病变的优势及不足。方法AP住院患者21例,均进行MRCP,轴位T1WI、T2WI、T2WI压脂4种脉冲序列成像及同期CT成像。观察胰腺大小、形态、密度、信号改变,胰周有无渗出及范围,肾前筋膜有无增厚,有无急性液体积聚及假性囊肿。在SPSS11.5软件包上采用χ2检验对观察结果进行统计学分析。结果MRCP原始像和3DMIP由于可多方位成像对胰液的渗出范围,与周围器官的关系均可以做出准确评定;轴位T1WI对组织的水肿、出血较为敏感,估计渗出范围准确;T2WI对急性液体积聚,假性囊肿显示良好;T2WI压脂可判断病变组织是单纯的水肿,还是合并积液。结论本研究提示,MRI与CT对AP具有同等诊断价值,不同MR序列对AP病变的显示具有互补作用。在显示病变性质及对指导临床治疗方面,MRI的作用甚至优于CT。
Objective To analyze the performance of acute pancreatitis (AP) lesion in each pulse sequence and CT and to understand the advantages and disadvantages of different MRI sequences and CT in displaying various AP lesions. Methods Twenty-one inpatients with AP were enrolled in this study. Four kinds of pulse sequence imaging including MRCP, axial T1WI, T2WI and T2WI were performed, and concurrent CT imaging was performed. Observe the pancreas size, shape, density, signal changes, peripancreatic exudate and the scope of the prerenal fascia with or without thickening, with or without acute fluid accumulation and pseudocyst. SPSS11.5 software package using χ2 test for statistical analysis of the observation results. Results MRCP original images and 3DMIP can be accurately evaluated in relation to the surrounding organs due to the multi-directional imaging of the extent of exudation of pancreatic juice. Axial T1WI is more sensitive to tissue edema and bleeding, and the exudation range is estimated accurately. T2WI pairs Acute fluid accumulation, pseudocysts showed good; T2WI fat can determine the diseased tissue is a simple edema, or combined with effusion. Conclusion This study suggests that MRI and CT have equal diagnostic value for AP, and different MR sequences have complementary effects on the display of AP lesion. The role of MRI is superior to that of CT in showing the nature of the disease and guiding the clinical treatment.