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Abstract：
Quantifying an imaging modality\'s ability to reproduce results is important for establishing its utility. In magnetic resonance spectroscopic imaging (MRSI), new acquisition protocols are regularly introduced which improve upon their precursors with respect to signal-to-noise ratio (SNR), total acquisition duration, and nominal voxel resolution. This study has quantified the within-subject and between-subject reproducibility of one such new protocol (reduced-field-of-view density-weighted concentric ring trajectory (rFOV-DW-CRT) MRSI) by calculating the coefficient of variance of data acquired from a test-retest experiment. The posterior cingulate cortex (PCC) and the right superior corona radiata (SCR) were selected as the regions of interest (ROIs) for grey matter (GM) and white matter (WM), respectively. CVs for between-subject and within-subject were consistently around or below 15% for Glx, tCho, and Myo-Ins, and below 5% for tNAA and tCr.
摘要：
量化成像模式重现结果的能力对于建立其实用性很重要。在磁共振波谱成像（MRSI）中，定期引入新的采集协议，以改善其在信噪比（SNR）方面的先兆，总采集持续时间，和标称体素分辨率。本研究通过计算从测试重测实验中获得的数据的变异系数，量化了一个这样的新协议（降低视野密度加权同心环轨迹（rFOV-DW-CRT）MRSI）的受试者内部和受试者之间的可重复性。选择后扣带皮质（PCC）和右上电晕辐射（SCR）作为灰质（GM）和白质（WM）的感兴趣区域（ROI），分别。受试者间和受试者内的CV始终在Glx的15%左右或以下，tCho,和Myo-Ins,tNAA和tCr低于5%。
