3052529 mPTT mild photothermal therapy 47 3052525 MPTT mild-temperature photothermal therapy 11 3052530 mPTT mild PTT 3 3052526 mPTT Mean parenchymal transit time 1 3052528 mPTT mild temperature PTT 1 3052531 mPTT Mild-hyperthermia photothermal therapy 1 3052527 mPTT modified pulse transit time 1