Is pulsed saturation transfer sufficient for differentiating radiation necrosis from tumor progression in brain metastases?

This was followed closely by the low-power MTR asymmetry (−1.6 ± 0.9% for RN and −1.3 ± 0.7% for TP, with P = .029 for t -test and P = .068 for univariable logistic regression) and the observed T 1 relaxation time, T 1 (2.0 ± 0.5 s for RN and 1.9 ± 0.4 s for TP with P = .083 for t -test and P = .11 with univariable logistic regression), which showed a trend but did not reach significance for logistic regression.

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