Department of Medical Radiological Technologists, Technological Education Institute of Athens, Greece.
Magn Reson Imaging. 2013 Jul;31(6):882-90. doi: 10.1016/j.mri.2013.03.006. Epub 2013 Apr 18.
The purpose of this study is to evaluate the ability of T2 turbo spin echo (TSE) axial and sagittal BLADE sequences in reducing or even eliminating motion, pulsatile flow and cross-talk artifacts in lumbar spine MRI examinations. Forty four patients, who had routinely undergone a lumbar spine examination, participated in the study. The following pairs of sequences with and without BLADE were compared: a) T2 TSE Sagittal (SAG) in thirty two cases, and b) T2 TSE Axial (AX) also in thirty two cases. Both quantitative and qualitative analyses were performed based on measurements in different normal anatomical structures and examination of seven characteristics, respectively. The qualitative analysis was performed by experienced radiologists. Also, the presence of image motion, pulsatile flow and cross-talk artifacts was evaluated. Based on the results of the qualitative analysis for the different sequences and anatomical structures, the BLADE sequences were found to be significantly superior to the conventional ones in all the cases. The BLADE sequences eliminated the motion artifacts in all the cases. In our results, it was found that in the examined sequences (sagittal and axial) the differences between the BLADE and conventional sequences regarding the elimination of motion, pulsatile flow and cross-talk artifacts were statistically significant. In all the comparisons, the T2 TSE BLADE sequences were significantly superior to the corresponding conventional sequences regarding the classification of their image quality. In conclusion, this technique appears to be capable of potentially eliminating motion, pulsatile flow and cross-talk artifacts in lumbar spine MR images and producing high quality images in collaborative and non-collaborative patients.
本研究旨在评估 T2 涡轮自旋回波（TSE）轴位和矢状位 BLADE 序列在减少甚至消除腰椎 MRI 检查中运动、脉动流和串扰伪影的能力。44 例常规行腰椎检查的患者参与了本研究。对比了有和没有 BLADE 的以下两组序列：a）32 例 T2 TSE 矢状位（SAG），和 b）32 例 T2 TSE 轴位（AX）。分别基于不同正常解剖结构的测量和 7 个特征的检查进行了定量和定性分析。定性分析由有经验的放射科医生进行。同时，评估了图像运动、脉动流和串扰伪影的存在。基于不同序列和解剖结构的定性分析结果，BLADE 序列在所有病例中均明显优于传统序列。BLADE 序列消除了所有病例的运动伪影。在我们的结果中，发现在所检查的序列（矢状位和轴位）中，BLADE 序列与传统序列在消除运动、脉动流和串扰伪影方面的差异具有统计学意义。在所有比较中，T2 TSE BLADE 序列在图像质量分类方面均明显优于相应的传统序列。总之，该技术似乎能够潜在地消除腰椎磁共振图像中的运动、脉动流和串扰伪影，并在协作和非协作患者中生成高质量的图像。
