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目的探讨乳腺癌MRI动态增强扫描及扩散加权成像(DWI)的表现,及其在病灶定性诊断中的价值。方法收集我院病理证实的MRI影像学资料完整的乳腺癌患者50例,并加以分析。结果乳腺癌MRI平扫T1WI呈等或稍低信号,T2WI为等或稍高信号。肿瘤形状不规则,部分有分叶,边界模糊,可见毛刺征,增强扫描不均匀强化。本组时间-信号强度曲线以Ⅲ型曲线为主,占68%;Ⅱ型曲线较少,占22%;Ⅰ型曲线最少,仅占10%。浸润性筛状癌早期强化率最高,其次是浸润性导管癌、乳头状癌,而黏液腺癌早期强化率最低,四者之间比较,差异有统计学意义(P<0.05);峰值强化率比较,四者之间差异无统计学意义(P>0.05)。病变ADC值为(0.98±0.23)×10-3mm2/s,对侧正常乳腺组织ADC值为(2.09±0.22)×10-3mm2/s,差异有统计学意义(P<0.05)。结论 MRI动态增强扫描及DWI对乳腺癌的定性诊断具有重要的临床价值,值得临床推广应用。
Objective To investigate the performance of dynamic contrast-enhanced MRI and diffusion weighted imaging (DWI) in breast cancer and its value in the qualitative diagnosis of breast lesions. Methods Fifty patients with complete breast cancer who were confirmed by pathology of MRI in our hospital were collected and analyzed. Results MRI T1WI showed equal or slightly lower signal intensity on T2WI and equal or slightly higher signal intensity on T2WI. Tumor irregular shape, part of the lobes, fuzzy boundaries, visible burr sign, enhanced scanning unevenly enhanced. This group of time - signal intensity curve to type Ⅲ-based curve, accounting for 68%; type Ⅱ curve is less, accounting for 22%; type Ⅰ curve at least, only 10%. The invasive rate of invasive carcinoma was the highest in early stage, followed by invasive ductal carcinoma and papillary carcinoma, while mucinous adenocarcinoma had the lowest early enhancement rate (P <0.05). The peak enhancement rate There was no significant difference between the four groups (P> 0.05). The ADC value of the lesion was (0.98 ± 0.23) × 10-3mm2 / s and that of the contralateral normal breast tissue was (2.09 ± 0.22) × 10-3mm2 / s, the difference was statistically significant (P <0.05). Conclusions MRI dynamic contrast-enhanced scanning and DWI have important clinical value in the diagnosis of breast cancer, which is worthy of clinical application.