目的 研究MRI、CT及X线在乳腺 癌术前诊断及治疗指导中的应用价值。 方法 选取我院2014年3月至2016年3月 120例拟诊为乳腺癌患者为研究对象，所 有患者在一周内先后接受MRI、CT及X线 检查。以手术病理结果为金标准，计算X 线、CT、MRI检查结果诊断乳腺癌的灵敏 度、特异度、阳性预测值、阴性预测值、 准确性。结果 X线检查灵敏度、特异度、 准确率分别为72.9%、62.5%、70.8%。 CT扫描灵敏度、特异度、准确率分别为 86.5%、70.8%、83.3%。MRI扫描灵敏度、 特异度、准确率分别为96.9%、79.2%、 93.3%。MRI扫描病灶大小与病理结果符合 度最高，其次为CT扫描，最次为X线。结 论 MRI在乳腺癌诊断与病灶大小测量中准 确性最高，其次为CT，再次为X线，合理 影像学检查方法有助于乳腺癌治疗方案选 择。

Objective To study the value of MRI, CT and X-ray in the preoperative diagnosis and treatment of breast cancer. Methods 120 cases of patients with suspected breast cancer who were admitted to our hospital during March 2014 to March 2016 were selected as subjects, and all patients received MRI, CT and X-ray examinations in a week. With the operation and pathological results as golden standard, the sensitivity, specificity, positive predictive value, negative predictive value and accuracy of X ray, CT and MRI in the diagnosis of breast cancer were calculated. Results The sensitivity, specificity and accuracy of X ray examination were 72.9%, 62.5% and 70.8% respectively, while those of CT scan were 86.5%, 70.8% and 83.3% respectively, and those of MRI scan were 96.9%, 79.2% and 93.3% respectively. The conformity of MRI scan with pathological findings was the highest in terms of the tumor size, followed by CT scan, and conformity of X-ray was the lowest. Conclusion The accuracy rates of MRI are the highest in the diagnosis of breast cancer and measurement of lesion size, followed by CT, and the accuracy rates of X-ray are the lowest. Reasonable imaging method is helpful to choose treatment for breast cancer.