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. Author manuscript; available in PMC: 2024 Apr 2.
Published in final edited form as: J Neurosurg. 2017 Apr 7;128(2):380–390. doi: 10.3171/2016.10.JNS161636

FIG. 4.

FIG. 4.

Case 13S. Automatic gain function may contribute to false positives. The visible-light image (A), NIR fluorescence superimposed and color-mapped onto the visible-light view (B), and NIR image (C) reveal the main specimen displaying strong NIR signal with a gain percentage at 15%. The visible-light image (D), NIR fluorescence superimposed and color-mapped onto the visible-light view (E), and NIR image (F) obtained after resection of the main tumor, showing a gain percentage increase to 71%. Notice the presence of a significant increase in background NIR signal in the skin edges partially obscured by Raney clips, bone, and so forth. Biopsy did not confirm the presence of meningioma.