Department of Medical Radiological Technologists, Technological Education Institute of Athens, Greece.
Magn Reson Imaging. 2013 Oct;31(8):1255-62. doi: 10.1016/j.mri.2013.06.007. Epub 2013 Jul 19.
The purpose of this study, is to compare the sequences: 1) proton density (PD) BLADE (BLADE is a PROPELLER-equivalent implementation of the Siemens Medical System) with fat saturation (FS) coronal (COR), 2) PD FS COR, 3) multi-planar reconstruction (MPR) with 3mm slice thickness and 4) multi-planar reconstruction (MPR) with 1.5mm slice thickness, both from the T2 3D-double-echo steady state (DESS) with water excitation (WE) sagittal (SAG), regarding their abilities to identify changes in the femorotibial condyle cartilage in knee MRI examinations. Thirty three consecutive patients with osteoarthritis (18 females, 15 males; mean age 56years, range 37-71years), who had been routinely scanned for knee examination using the previously mentioned image acquisition techniques, participated in the study. A quantitative analysis was performed based on the relative contrast (ReCON) measurements, which were taken both on normal tissues as well as on pathologies. Additionally, a qualitative analysis was performed by two radiologists. Motion and pulsatile flow artifacts were evaluated. The PD BLADE FS COR sequence produced images of higher contrast between Menisci and Cartilage, Fluid and Cartilage, Pathologies and Cartilage as well as of the Conspicuousness Superficial Cartilage and it was found to be superior to the other sequences (p<0.001). The sequences T2 3D DESS 1.5mm and T2 3D DESS 3mm were significantly superior to the PD BLADE FS COR and the PD FS COR sequences in the visualization of Bone and Cartilage and the Conspicuousness Deep Surface Cartilage. This pattern of results is also confirmed by the quantitative analysis. PD FS BLADE sequences are ideal for the depiction of the cartilage pathologies compared to the conventional PD FS and T2 3D DESS sequences.
本研究旨在比较以下序列在膝关节 MRI 检查中识别股骨胫骨髁软骨变化的能力：1）质子密度（PD）BLADE（BLADE 是西门子医疗系统的 PROPELLER 等效实现）与脂肪饱和（FS）冠状位（COR），2）PD FS COR，3）3mm 层厚的多平面重建（MPR）和 4）1.5mm 层厚的多平面重建（MPR），均来自 T2 三维双回波稳态（DESS）水激励（WE）矢状位（SAG）。33 名连续的骨关节炎患者（18 名女性，15 名男性；平均年龄 56 岁，范围 37-71 岁），他们使用上述图像采集技术常规扫描膝关节，参与了本研究。在正常组织和病变组织上进行了相对对比度（ReCON）测量的定量分析。此外，由两名放射科医生进行了定性分析。评估了运动和脉动流伪影。PD BLADE FS COR 序列在半月板和软骨、液体和软骨、病变和软骨之间产生了更高对比度的图像，并且在可见度浅表软骨方面表现优于其他序列（p<0.001）。序列 T2 3D DESS 1.5mm 和 T2 3D DESS 3mm 在骨和软骨以及深部表面软骨的可视化方面明显优于 PD BLADE FS COR 和 PD FS COR 序列。定量分析也证实了这种结果模式。与传统的 PD FS 和 T2 3D DESS 序列相比，PD FS BLADE 序列非常适合显示软骨病变。
