Department of Radiology, Research Institute of Radiological Science, YUHS-KRIBB Medical Convergence Research Institute, and Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, Republic of Korea.
Department of Radiology, Research Institute of Radiological Science, YUHS-KRIBB Medical Convergence Research Institute, and Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, Republic of Korea.
Eur J Radiol. 2019 Mar;112:52-58. doi: 10.1016/j.ejrad.2019.01.009. Epub 2019 Jan 9.
To investigate the feasibility of three-dimensional fast spin echo (3D-FSE) imaging with compressed sensing (CS) and parallel imaging (PI) compared to 3D-FSE imaging with only PI in evaluating ankle joint pathologies.
Twenty consecutive patients underwent ankle magnetic resonance imaging (MRI), including acquisition of image sets of 2D-FSE sequences, and 3D-FSE sequences without and with CS, between June 2016 and November 2017. Three MR image sets were independently rated by two radiologists for the presence/absence of ankle pathology. Quantitative image similarity and subjective image quality were evaluated using 3D-FSE images without CS and those with CS-PI. Inter-sequence agreement between 3D-FSE sequences without CS and with CS-PI in both readers was evaluated.
Interobserver agreements were nearly perfect for sprain of the anterior talofibular ligament (ATFL, κ=0.77), osteochondral lesion of the talus (OLT, κ=0.76-0.88), osteochondral lesion of the distal tibia (OLTi, κ=0.74) and os subfibulare (OSF, κ=0.62-0.64). The structural similarity index (mean, 0.996; range, 0.990-0.997) between the 3D-FSE sequences without CS and with CS-PI was acceptable. There was no significant difference in subjective image quality between the two imaging sequences (ATFL, p = 0.317; bone marrow, p = 0.083; cartilage, p = 1.000, tendon, p = 1.000). Intersequence agreement between the 3D-FSE sequences with and without CS was nearly perfect (ATFL and OLTi, κ=1.00; OLT, κ=0.87-0.96; OSF, κ=0.62-0.64) in both readers.
Isotropic 3D-FSE ankle MRI with CS provides acceptable diagnostic performance with reduced scan time. Compressed sensing-related artifacts could be minimized with CS reconstruction enhancement, allowing for better image quality for evaluating ankle joint pathologies.
与仅使用并行成像（PI）的三维快速自旋回波（3D-FSE）成像相比，研究使用压缩感知（CS）和并行成像（PI）的三维快速自旋回波（3D-FSE）成像评估踝关节病变的可行性。
2016 年 6 月至 2017 年 11 月，连续 20 例患者接受踝关节磁共振成像（MRI）检查，包括采集二维 FSE 序列和无 CS 的 3D-FSE 序列以及带 CS 的 3D-FSE 序列的图像。两位放射科医生独立对 3 种 MR 图像集进行评估，以确定是否存在踝关节病变。使用无 CS 的 3D-FSE 图像和带 CS-PI 的 3D-FSE 图像评估图像相似性和主观图像质量。在两位读者中，评估无 CS 的 3D-FSE 序列和带 CS-PI 的 3D-FSE 序列之间的序列间一致性。
在距腓前韧带（ATFL）、距骨骨软骨损伤（OLT）、胫骨远端骨软骨损伤（OLTi）和距骨下骨（OSF）的扭伤中，观察者间一致性接近完美（κ=0.77）。结构相似性指数（平均值，0.996；范围，0.990-0.997）在无 CS 的 3D-FSE 序列和带 CS-PI 的 3D-FSE 序列之间是可以接受的。两种成像序列的主观图像质量无显著差异（ATFL，p=0.317；骨髓，p=0.083；软骨，p=1.000；肌腱，p=1.000）。在两位读者中，带 CS 的 3D-FSE 序列与不带 CS 的 3D-FSE 序列之间的序列间一致性几乎是完美的（ATFL 和 OLTi，κ=1.00；OLT，κ=0.87-0.96；OSF，κ=0.62-0.64）。
具有 CS 的各向同性 3D-FSE 踝关节 MRI 可提供可接受的诊断性能，同时扫描时间更短。通过 CS 重建增强可以最小化与 CS 相关的伪影，从而为评估踝关节病变提供更好的图像质量。
