CT、MRI对前列腺癌术前分期的诊断效能对比

目的探讨CT、MRI对前列腺癌术前分期的诊断效能。方法选取我院2018年6月~2019年2月收治的81例经病理确诊的前列腺癌患者,均进行了CT、MRI检查,收集患者临床及影像学资料,总结CT、MRI影像特征,对比两者对前列腺癌的诊断效能。结果以病理活检检查结果为标准,CT对前列腺癌A、B、C、D分期诊断正确率分别为40.00%、57.14%、79.41%、100.00%,MRI对前列腺癌A、B、C、D分期诊断正确率分别为80.00%、90.47%、97.05%、100.00%,MRI对前列腺癌分期诊断正确率明显优于CT检查(P<0.05);81例前列腺癌患者CT图像中,整体前列腺形态大小正常者11例,多数患者前列腺体积出现增大,47例患者病灶外形呈结节状或片状,平扫显示均匀软组织密度影,B期患者膀胱壁出现不规则增厚,膀胱精囊三角区域基本消失,同时与膀胱界限模糊,增强动脉期及静脉期扫描均可见病灶强化、强化均匀。T1WI轴位扫描图像中前列腺癌病灶为一致性较低信号或等信号,T2WI轴位及T2WI冠位扫描图像可见低信号,T1WI增强扫描中病变强化。结论CT、MRI检查均能显示前列腺癌影像学表现,MRI对前列腺癌的分期诊断正确率明显高于CT检查。

Comparison on Diagnostic Efficacy of CT and MRI in Preoperative Staging of Prostate Cancer

Objective To investigate the diagnostic efficacy of CT and MRI in preoperative staging of prostate cancer.Methods Eighty-one cases of pathologically confirmed prostate cancer patients admitted to our hospital from June 2018 to February 2019 were selected for CT and MRI examination,clinical and imaging data of the patients were collected,and CT and MRI image characteristics were summarized to compare the diagnostic efficacy of the two for prostate cancer.Results Regarded the results of pathological biopsy as the reference,the diagnostic accuracy of CT for A,B,C,D staging of prostate cancer was 40.00%,57.14%,79.41%,100.00%,respectively and the diagnostic accuracy of MRI for A,B,C,D staging of prostate cancer was 80.00%,90.47%,97.05%,and 100.00%,respectively.The diagnostic accuracy of MRI for A,B,C,D staging of prostate cancer was significantly better than that of CT(P<0.05).In the CT images of 81 patients with prostate cancer,there were 11 patients with normal size of prostate on the whole,and most patients had enlarged prostate.The lesions of 47 patients were nodular or flaky.The plain scan showed uniform density shadow of soft tissue.The patients in B-stage had irregular thickening of the bladder wall.Their triangular regions of the bladder and seminal vesicles disappeared,and the boundary with the bladder was blurred,and in the arterial phase and the venous phase,the enhanced scan showed uniform enhancement,and no obvious abnormal enhancement was observed.The lesions of prostate cancer in the T1WI axial image were lower signal or equal signal consistently.The T2WI axial image and the T2WI coronal image showed uneven signal of prostate.The T2WI cross-sectional image showed that the lesion was abnormally low signal,and the lesion showed uniform enhancement in the MRI enhanced scan of T1WI.Conclusion Both CT and MRI can show the imaging manifestations of prostate cancer,and the diagnostic accuracy of MRI in staging of prostate cancer is significantly higher than that of CT.