摘要
目的:探讨MRI对乳腺原位癌的诊断价值。方法:回顾性分析9例经病理学证实的乳腺原位癌的MRI表现,所有患者均行MRI平扫及灌注成像。结果:所有病变于T1WI呈低信号,7例T2WI呈混杂稍高信号或高信号、2例呈等信号。增强扫描示6例呈非肿块样强化,其中2例呈线样/导管样强化,3例呈斑片状强化,1例为弥漫性强化;3例呈肿块样强化。时间-信号强度曲线:平台型7例,上升型1例,廓清型1例。灌注成像测量的灌注参数包括洗进(Washin)、洗出(Washout)、达峰时间(TTP)、最大信号强度值(MIPt)及阳性强化积分(PEI),其均值依次为756.84±48.70、-0.0856±8.99、248.51±22.52、464.51±28.43、1282.11±96.86,与正常乳腺组织各参数值比较差异均有统计学意义(P<0.05)。结论:乳腺原位癌以局灶性强化最常见,时间-信号强度曲线以平台型为主,MRI在乳腺原位癌诊断中具有一定的价值,MR灌注成像也为原位癌的诊断提供一种新的方法。
Objective：To assess the value of MR imaging in the diagnosis of breast carcinoma in situ （CIS）. Methods： MRI of 9 cases of breast CIS confirmed by histopathologic findings were analyzed retrospectivly. Results： All nine cases showed low signal on T1 WI, on T2 WI 7 cases showed high signal and mixed higher signals, 2 cases showed equal signal. Af- ter contrast administration,6 cases showed a non-mass-like enhancement,2 cases showed linear-ductal-like enhancement, 3 cases showed patchy enhancement, 1 case showed diffuse enhancement. 3 cases showed a mass-like enhancement. Time-sig naI intensity curves （TIC） of 7 lesions were plateau,1 lesion was wash-in,and 1 lesion was wash-out. Pseudo-color pictures of breast perfusion：Washin,Washout, TTP, MIPt and PEI values of breast CIS were 756.84 ±48.70.- 0. 0856±8. 99. 248.51±22.52,464.51±28.43 and 1282.11±96.86, there were significant difference between the breast carcinoma in situ and normal breast tissue（P〈0.05）. Conclusion： Focal enhancement is the most common morphological characteristics of breast CIS,type Ⅱ TIC is the most common types. MRI in the diagnosis of breast carcinoma in situ has certain effect, perfu- sion imaging for the diagnosis of carcinoma in situ provides a new approach.
出处
《放射学实践》
2012年第11期1204-1207,共4页
Radiologic Practice
关键词
乳腺肿瘤
原位癌
磁共振成像
Breast neoplasms
Carcinoma in situ
Magnetic resonance imaging
