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. 2023 Aug 31;15(8):e44492. doi: 10.7759/cureus.44492

Figure 11. Magnetic resonance images before and after the third 10-fr SRS combined with simultaneous whole-brain irradiation for local failure following prior SRS of the left parietal lesion.

Figure 11

The images show (A-D) axial CE-T1-WIs and (E-H) axial T2-WIs (A, E) five days before (Pre) the third SRS (17.3 months after the initiation of CRT); (B, F) at 0.5 mo after the third SRS; (C, G) at 2.3 mos; and (D, H) at 5.9 months after SRS (23.9 mos after CRT).

(A-H) These images are shown at the same magnification and coordinates under co-registration and fusions. (A-H) The solid enhancing lesion (arrows in A and E) shrank remarkably from 0.5 to 2.3 mos (arrows in B, C, F, and G) and almost disappeared at 5.9 mos (arrows in D and H). Despite the re-irradiation setting, the pre-existing perilesional edema (arrow in E) disappeared without the development of any adverse radiation effects (arrow in H) at 5.9 mos.

CE, contrast-enhanced; WIs, weighted images; SRS, stereotactic radiosurgery; CRT, chemoradiotherapy; mo, month; fr, fraction