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R2 * maps and SE images (TR/TE: 830 ms/80 ms, flip angle: 90°) before (a + b) and after (c + d) RE. Variations in R*2 values before RE (a) correspond to variations on SE images (b). After RE, increased R*2 values were observed at locations with Ho-PLLA-MS deposition (c), corresponding to tumour lesions with high intensities on SE images (arrows) (d)
