Fig. 2
Post-RT evaluation in a patient with lung cancer and brain metastasis; A Contrast-enhanced fat-suppressed T1: metastatic lesion showing contrast enhancement, B ASL CBF: minimal signal change in the lesion site, C DSC CBV: Significant hyperperfusion in the lesion site, D DSC CBF: Mild moderate hyperperfusion is observed compared to CBV. It is categorized as RRT with follow-up imaging and clinic. Control image with recurrence of leiomyosarcoma metastasis and after surgery and RT history, E Contrast-enhanced fat-suppressed T1: Solid lesion with contrast enhancement in the posterior part of the operation cavity wall, F ASL CBF: Hyperperfusion in the lesion site, G DSC CBV: Marked hyperperfusion in the lesion site, H DSC CBF: Hyperperfusion in the lesion site. It is categorized as RRT with follow-up imaging and clinic. Case with a history of surgery and RT due to Grade 3 Astrocytoma, I Contrast-enhanced fat-suppressed T1: Solid-looking area showing contrast enhancement on the operation cavity wall, J ASL CBF: Hyperperfusion in the contrasted area, K DSC CBV: Significant hyperperfusion in the contrasted area, L Hyperperfusion is observed in the contrasted area. It is categorized as RRT with follow-up imaging and clinic. Control MRI in the case with a history of surgery and RT due to breast cancer brain metastasis, M Contrast-enhanced fat-suppressed T1: Moderate thickening of the wall medial to the operation cavity is observed in the left cerebellar hemisphere, N ASL CBF, O DSC CBV, P DSC CBF: The part medial to the cavity is hypoperfused compared to the opposite hemisphere. When evaluated with follow-up findings, it is in favor of TCR