Institute of Radiology and Nuclear Medicine, Kantonsspital Winterthur, Winterthur, Switzerland.
Faculty of Medicine, University of Zurich, Zurich, Switzerland.
PLoS One. 2019 Apr 12;14(4):e0214887. doi: 10.1371/journal.pone.0214887. eCollection 2019.
Acceleration of MR sequences beyond current parallel imaging techniques is possible with the Compressed SENSE technique that has recently become available for 1.5 and 3 Tesla scanners, for nearly all image contrasts and for 2D and 3D sequences. The impact of this technique on examination timing parameters and MR protocols in a clinical setting was investigated in this retrospective study.
A numerical analysis of the examination timing parameters (scan time, exam time, procedure time, interscan delay time, changeover time, nonscan time) based on the MR protocols of 6 different body regions (brain, knee, lumbar spine, breast, shoulder) using MR log files was performed and the total number of examinations acquired from January to April both in 2017 and 2018 on a 1.5 T MR scanner was registered. Percentages, box plots and unpaired two-sided t tests were obtained for statistical evaluation.
All examination timing parameters of the six anatomical regions analysed were significantly shortened after implementation of Compressed SENSE. On average, scan times were accelerated by 20.2% (p<0.0001) while procedure times were shortened by 16% (p<0.0001). Considering all anatomical regions and all MR protocols, 27% more examinations were performed over the same 4 month period in 2018 compared to 2017.
Compressed SENSE allows for a significant acceleration of MR examinations and a considerable increase in the total number of MR examinations is possible.
压缩感应技术（Compressed SENSE）可实现目前的并行成像技术以外的磁共振（MR）序列加速，该技术最近已可用于 1.5T 和 3T 扫描仪，几乎适用于所有图像对比和 2D 和 3D 序列。本回顾性研究旨在探讨该技术对临床检查时间参数和 MR 方案的影响。
使用 MR 日志文件对 6 个不同身体部位（脑、膝、腰椎、乳房、肩）的 MR 方案的检查时间参数（扫描时间、检查时间、程序时间、扫描间延迟时间、转换时间、无扫描时间）进行数值分析，并登记 2017 年 1 月至 4 月和 2018 年 1.5T MR 扫描仪上获得的总检查次数。获取百分比、箱线图和未配对双侧 t 检验进行统计评估。
实施压缩感应后，所有 6 个解剖区域的检查时间参数均显著缩短。平均而言，扫描时间加速了 20.2%（p<0.0001），而程序时间缩短了 16%（p<0.0001）。考虑到所有解剖区域和所有 MR 方案，与 2017 年相比，2018 年同一 4 个月期间进行的检查增加了 27%。
压缩感应允许 MR 检查显著加速，并且可以增加总检查次数。
