Department of Biomedical Engineering, The Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel.
J Magn Reson. 2013 Jun;231:72-8. doi: 10.1016/j.jmr.2013.03.009. Epub 2013 Mar 29.
Unilateral NMR devices are important tools in various applications such as non-destructive testing and well logging, but are not applied routinely for imaging, primarily because B0 inhomogeneity in these scanners leads to a relatively low signal and requires use of the slow single point imaging scan scheme. Enabling high quality, fast imaging could make this affordable and portable technology practical for various imaging applications as well as for new applications that are not yet feasible with MRI technology. The goal of this work was to improve imaging times in a portable unilateral NMR scanner. Both Compressed Sensing and Fast Spin Echo were modified and applied to fit the unique characteristics of a unilateral device. Two printed phantoms, allowing high resolution images, were scanned with both methods and compared to a standard scan and to a low pass scan to evaluate performance. Both methods were found to be feasible with a unilateral device, proving ways to accelerate single point imaging in such scanners. This outcome encourages us to explore how to further accelerate imaging times in unilateral NMR devices so that this technology might become clinically applicable in the future.
单侧 NMR 设备是各种应用中的重要工具，如无损检测和测井，但由于这些扫描仪中的 B0 非均匀性导致信号相对较低，需要使用缓慢的单点成像扫描方案，因此并未常规用于成像。能够实现高质量、快速成像，可以使这种经济实惠且便携的技术适用于各种成像应用，以及目前尚无法通过 MRI 技术实现的新应用。本工作的目的是改善便携式单侧 NMR 扫描仪的成像时间。分别对压缩感知和快速自旋回波进行了修改和应用，以适应单侧设备的独特特性。使用这两种方法对两个印刷体模进行了扫描，并与标准扫描和低通扫描进行了比较，以评估性能。结果表明，这两种方法在单侧设备中都是可行的，为在这种扫描仪中加速单点成像提供了途径。这一结果鼓励我们探索如何进一步缩短单侧 NMR 设备的成像时间，以便该技术在未来能够在临床应用中得到应用。
