Ishikawa Hironobu, Seino Shinya, Takasumi Hideaki, Kikori Katsuyuki, Harata Masahiro, Kanezawa Takashi, Watanabe Naoki, Satou Takanori, Nishina Takashi, Kuhara Shigehide
Department of Radiology, Public University Corporation Fukushima Medical University.
Toshiba Medical Systems Corporation.
Nihon Hoshasen Gijutsu Gakkai Zasshi. 2018;74(1):13-21. doi: 10.6009/jjrt.2018_JSRT_74.1.13.
The aim of this study was to evaluate the measurement precision and accuracy of T mapping using a polarity corrected (PC) TI prep tool, which was based on fast field echo (FFE) and obtained one data point with one inversion recovery (IR) pulse. A phantom was used consisting of eight materials with different Gd concentrations. T mappings were measured by changing the trigger interval and the inversion time (TI) interval. The T mapping measurement precision using the PC TI prep tool increased as the trigger interval was made longer. The measurement precision didn't depend on the interval of TI. On the other hand, when the trigger intervals are more than 1000 ms, the measurement accuracy was less than approximately 8%. By setting the optimal end of TI, the T mapping using a PC TI prep tool could measure the T value precisely and accurately.
本研究的目的是评估使用极性校正（PC）TI预脉冲工具进行T值映射的测量精度和准确性，该工具基于快速场回波（FFE），并通过一个反转恢复（IR）脉冲获得一个数据点。使用了一个由八种不同钆浓度材料组成的体模。通过改变触发间隔和反转时间（TI）间隔来测量T值映射。使用PC TI预脉冲工具的T值映射测量精度随着触发间隔变长而提高。测量精度不依赖于TI间隔。另一方面，当触发间隔超过1000毫秒时，测量准确度小于约8%。通过设置TI的最佳终点，使用PC TI预脉冲工具的T值映射可以精确且准确地测量T值。
