From the Department of Radiological Sciences (P.S., A.C., K.N.), University of California Los Angeles, Los Angeles, California.
Department of Radiology (R.G., P.B., A.D., K.N.), Icahn School of Medicine at the Mount Sinai Hospital, New York, New York.
AJNR Am J Neuroradiol. 2022 Jun;43(6):887-892. doi: 10.3174/ajnr.A7532.
Differential Subsampling with Cartesian Ordering (DISCO), an ultrafast high-spatial-resolution head MRA, has been introduced. We aimed to determine the diagnostic performance of DISCO-MRA in grading residual aneurysm in comparison with TOF-MRA in patients with treated intracranial aneurysms.
Patients with endovascular treatment and having undergone DISCO-MRA, TOF-MRA, and DSA were included for review. The voxel size and acquisition time were 0.75 × 0.75 × 1 mm/6 seconds for DISCO-MRA and 0.6 × 0.6 × 1 mm/6 minutes for TOF-MRA. Residual aneurysms were determined using the Modified Raymond-Roy Classification on TOF-MRA and DISCO-MRA by 2 neuroradiologists independently and were compared against DSA as the reference standard. Statistical analysis was performed using the κ statistic and the χ test.
Sixty-eight treated intracranial aneurysms were included. The intermodality agreement was κ = 0.82 (95% CI, 0.67-0.97) between DISCO and DSA and 0.44 (95% CI, 0.28-0.61) between TOF and DSA. Modified Raymond-Roy Classification scores matched DSA scores in 60/68 cases (88%; χ = 144.4, < .001 for DISCO and 46/68 cases (68%; χ = 65.0, < .001) for TOF. The diagnostic accuracy for the detection of aneurysm remnants was higher for DISCO (0.96; 95% CI, 0.88-0.99) than for TOF (0.79; 95% CI, 0.68-0.88).
In patients with endovascularly treated intracranial aneurysms, DISCO-MRA provides superior diagnostic performance in comparison with TOF-MRA in delineating residual aneurysms in a fraction of the time.
介绍了一种超快高空间分辨率头部 MRA 技术，即笛卡尔有序差分采样（DISCO）。我们旨在比较 DISCO-MRA 和时间飞跃法（TOF）MRA 在评估治疗后颅内动脉瘤患者残留动脉瘤分级方面的诊断性能。
回顾性纳入接受 DISCO-MRA、TOF-MRA 和 DSA 检查的血管内治疗患者。DISCO-MRA 的体素大小和采集时间为 0.75×0.75×1mm/6 秒，TOF-MRA 为 0.6×0.6×1mm/6 分钟。两名神经放射科医生独立使用改良 Raymond-Roy 分类法在 TOF-MRA 和 DISCO-MRA 上确定残留动脉瘤，并与 DSA 作为参考标准进行比较。采用κ 统计和 χ 检验进行统计学分析。
共纳入 68 个治疗后的颅内动脉瘤。DISCO 与 DSA 之间的模态间一致性为 κ=0.82（95%可信区间，0.67-0.97），TOF 与 DSA 之间的一致性为 κ=0.44（95%可信区间，0.28-0.61）。在 68 例病例中，改良 Raymond-Roy 分类评分与 DSA 评分匹配的有 60 例（88%；χ=144.4，<0.001），TOF 为 46 例（68%；χ=65.0，<0.001）。DISCO 检测动脉瘤残腔的诊断准确性（0.96；95%可信区间，0.88-0.99）优于 TOF（0.79；95%可信区间，0.68-0.88）。
在接受血管内治疗的颅内动脉瘤患者中，DISCO-MRA 可在更短的时间内提供比 TOF-MRA 更优越的诊断性能，用于描绘残留动脉瘤。
