Stereotactic radiotherapy (SRS) has become a widely used treatment for patients with brain metastases (BM). However, differential radionecorsis (RN) and tumor recurrence (TR) after SRS for BM by MR images is still challenging. In this study, a quantitative dynamic susceptibility contrasted perfusion weighted imaging (DSC-PWI) technique was applied to solve this problem. The results showed that quantitative DSC-PWI had higher diagnostic efficiency and smaller inter-observer differences than traditional DSC-PWI.
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