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目的比较表观扩散系数(ADC)及T2值在区分肝脏局灶性小病变性质方面的价值。方法62例(84个病灶)肝脏局灶性占位小病变患者(其中包括原发性肝细胞癌19例23个病灶,肝转移瘤11例18个病灶,肝海绵状血管瘤24例32个病灶,肝囊肿8例11个病灶)分别行磁共振扩散加权成像(DWI)和快速自旋回波(SE)T2WI,测量、分析、对比各病变的ADC值及T2值。所有病例均经手术病理或CT、B超临床确诊。结果肝癌、肝转移瘤、肝血管瘤及肝囊肿的平均ADC值分别为(1.35±0.18)×10-3mm2/s、(1.41±0.12)×10-3mm2/s、(2.39±0.21)×10-3mm2/s、(3.44±0.27)×10-3mm2/s,肝脏恶性病变的ADC值明显低于良性病变(P<0.01),其诊断正确率为94.0%;肝脏恶性病变的T2值也低于良性病变(P<0.05),但两者数值重叠较多,其诊断正确率为78.6%。T2值诊断正确率明显低于ADC值(P<0.05)。结论ADC值在肝脏局灶性小病变定性诊断方面优于T2值,更具临床价值。
Objective To compare the apparent diffusion coefficient (ADC) and T2 value in differentiating the characteristics of focal focal liver lesions. Methods Sixty-two patients (84 lesions) with focal small lesions of liver (including 23 lesions of primary hepatocellular carcinoma in 19 lesions, 11 lesions of hepatic metastases in 18 lesions, and 24 lesions of hepatic cavernous hemangiomas in 32 lesions Lesions and hepatic cysts in 8 patients and 11 lesions) were measured by diffusion weighted imaging (DWI) and rapid spin echo (SE) T2WI respectively. The ADC value and T2 value of each lesion were measured and compared. All cases were pathologically confirmed by CT or CT. Results The average ADC values of hepatocellular carcinoma, hepatic metastases, hepatic hemangiomas and hepatic cysts were (1.35 ± 0.18) × 10-3mm2 / s, (1.41 ± 0.12) × 10-3mm2 / s and (2.39 ± 0.21) × 10 (3.44 ± 0.27) × 10-3mm2 / s, the ADC value of liver malignant lesions was significantly lower than that of benign lesions (P <0.01), and the diagnostic accuracy was 94.0%. The T2 value of liver malignant lesions was also low In benign lesions (P <0.05), but the two values overlap more, the diagnostic accuracy rate was 78.6%. T2 diagnostic accuracy was significantly lower than the ADC value (P <0.05). Conclusion The ADC value is superior to T2 in the qualitative diagnosis of focal small lesions in liver, which has clinical value.