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目的：探讨肺癌ＭＲＩ信号强度与ＤＮＡ倍体的关系。材料与方法：２６例肺癌患者，术前用Ｒｅｓｏｎｅｘ０．３８Ｔ磁共振成像系统，行横断面 ＳＥ Ｔ_１加权，ＧＲ序列成像，增强后行 ＳＥ Ｔ_１加权成像。术后标本用 ＩＣＭ－１００细胞图像分析仪，测定该例肺癌的ＤＮＡ含量及ＳＰＦ值。结果：Ｔ_１加权平扫二倍体肿瘤信号强度比（病变／椎体）显著小于异倍体肿瘤的信号强度比。二倍体肿瘤的ＳＰ值也显著小于异倍体肿瘤的ＳＰＦ值。但肿癌ＭＲＩ信号强度比不能反映其ＳＰＦ值。结论：ＭＲＩ信号强度在一定程度上可反映肿瘤细胞的倍体情况，即可间接地反映肿瘤细胞的生物学行为。
Objective: To investigate the relationship between MRI signal intensity and DNA ploidy in lung cancer. MATERIALS AND METHODS: Twenty-six patients with lung cancer underwent preoperative resolution of the Resonex 0.38T magnetic resonance imaging system with SE T_1 weighted and GR sequence imaging and enhanced with SE T_1 weighted imaging. Postoperative specimens using ICM-100 cell image analyzer to determine the case of lung cancer DNA content and SPF value. Results: The T 1 weighted mean diploid tumor signal intensity ratio (lesion / vertebral body) was significantly less than the aneuploidy tumor signal intensity ratio. The SP value of diploid tumors was also significantly smaller than that of aneuploid tumors. However, the MRI signal intensity ratio of tumor can not reflect the SPF value. Conclusion: MRI signal intensity can reflect the ploidy status of tumor cells to a certain extent, which can indirectly reflect the biological behavior of tumor cells.