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目的:探讨3D-TOF-MRA的最大密度投影法(MIP)及多平面重建法(MPR)对脑动脉瘤的诊断价值。方法:对170例临床怀疑脑动脉瘤的病例行3D-TOF-MRA检查,并分别用MIP及MPR法诊断,以3D-DSA诊断结果为金标准对结果进行对比分析。结果:3D-DSA共检出86个动脉瘤。MIP诊断出动脉瘤72个,MIP诊断脑动脉瘤的敏感性、特异性、PPV、NPV分别为83.7%、98.9%、98.6%、86.5%;MPR诊断出动脉瘤73个,MPR诊断脑动脉瘤的敏感性、特异性、PPV、NPV分别为84.9%、98.9%、98.6%、87.4%;MIP+MPR诊断出动脉瘤80个,MIP+MPR诊断脑动脉瘤的敏感性、特异性、PPV、NPV分别为93.0%、98.9%、98.8%、93.8%。结论:3D-TOF-MRA的MIP与MPR两种后处理方法有很强的互补性,联合应用能提高诊断颅内动脉瘤的敏感性。
Objective: To investigate the diagnostic value of maximum density projection (MIP) and multiplanar reconstruction (MPR) of 3D-TOF-MRA in cerebral aneurysms. Methods: 3D-TOF-MRA was performed on 170 cases of clinical suspected cerebral aneurysms and diagnosed by MIP and MPR respectively. The results of 3D-DSA diagnosis were compared with gold standard. Results: A total of 86 aneurysms were detected by 3D-DSA. MIP diagnosis of aneurysm 72, MIP diagnosis of cerebral aneurysm sensitivity, specificity, PPV, NPV were 83.7%, 98.9%, 98.6%, 86.5%; MPR diagnosis of aneurysm 73, MPR diagnosis of cerebral aneurysm The sensitivity, specificity, PPV, NPV were 84.9%, 98.9%, 98.6%, 87.4% respectively. MIP + MPR diagnosed 80 aneurysms. The sensitivity, specificity, NPV were 93.0%, 98.9%, 98.8%, 93.8% respectively. Conclusion: The 3D-TOF-MRA MIP and MPR two post-treatment methods are very complementary, combined application can improve the sensitivity of the diagnosis of intracranial aneurysms.