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. Author manuscript; available in PMC: 2024 May 1.
Published in final edited form as: Ultrasound Med Biol. 2023 Jan 28;49(5):1082–1090. doi: 10.1016/j.ultrasmedbio.2022.12.006

Figure 2. Examples of MR images of GL26 allograft acquired before and immediately post MRgFUS.

Figure 2.

A) T2-weighted images did not show edema after MRgFUS. T2*-weighted gradient echo image (GRE) did not show hemorrhage from MRgFUS. Post-contrast T1-weighted images showed the enhancement of the tumor both before and post MRgFUS (white arrows), with a more pronounced enhancement on the post MRgFUS images. Post-contrast T1-weighted images in the axial plane also showed the enhancement in the brain tissue below the tumor along the path of the ultrasound beam (black arrow). Ktrans map from horizontal direction showed elevated Ktrans in the tumor prior to MRgFUS and an increase in Ktrans signal upon MRgFUS induction (white arrows). B showed the comparison of Ktrans values for Pre_FUS versus Post_FUS from the tumors of FUSX1 group. The Post_FUS Ktrans values increased significantly from Pre_FUS ones (p=0.03) (n=5 in each group)..