Keywords: Quantitative Imaging, Signal Representations
Weighted MRI images are widely used in both clinical and open-source datasets, while quantitative mapping is not always feasible. The ratio of T1 and T2 weighted images was previously suggested as a semi-quantitative measurement. We propose two additional weighted ratios T1w/PDw and ln(T2w/PDw), as semi-quantitative proxies for R1 and R2, which we tested on phantom and human data. We found that the new ratios accurately represent the quantitative parameters in both datasets.
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