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表观扩散系数在原发性肌骨肿瘤中的应用价值

Keywords: 肌骨肿瘤,磁共振成像,扩散加权成像,表观弥散系数

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Abstract:

目的探讨磁共振扩散加权成像(DWI)及表观扩散系数(ADC)值在原发性肌骨肿瘤中的应用价值。方法回顾分析经组织病理证实的61例原发性肌骨肿瘤患者,术前行磁共振常规及DWI检查,DWI选取SE-EPI序列,b值取0、700s/mm2,在T1WI增强横轴位图像上分别测量肿瘤实质区ADC、肿瘤整体ADC及邻近正常横纹肌ADC值,用统计学软件分析各组间ADC值差异。结果良性肿瘤34例,恶性肿瘤27例①良、恶性组肿瘤DWI图像信号高低差异无统计学意义;②正常横纹肌、良恶性组实质区平均ADC值分别为(1.65±0.76)×10-3、(1.58±0.82)×10-3、(1.28±0.32)×10-3mm2?s-1,三组间差异无统计学意义(F=4.687,P>0.05);良恶性组整体ADC值分别为(1.58±0.74)×10-3mm2?s-1、(1.35±0.39)×10-3mm2?s-1,差异无统计学意义(t=1.19,P>0.05);③9例富含粘液肿瘤实质区平均ADC值(2.32±0.19)×10-3mm2?s-1,52例其他肿瘤实质区平均ADC值(1.36±0.37)×10-3mm2?s-1,两者差异有统计学意义(t=0.704,P<0.05)。结论无论是肿瘤实质区平均ADC值还是整体ADC值皆不能直接用于肌骨系统良恶性肿瘤的鉴别诊断,较高ADC值(大于2.0×10-3mm2?s-1)对诊断富含粘液基质类型的肌骨肿瘤有一定诊断价值。

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