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. Author manuscript; available in PMC: 2022 May 1.
Published in final edited form as: IEEE Trans Biomed Eng. 2021 Apr 22;68(5):1477–1486. doi: 10.1109/TBME.2021.3054922

Fig. 7.

Fig. 7.

The L-SPG stain results of the needle and tissue: (a) the undisplaced SB needle and the tissue before the insertion and the (b) SB, (c) LMB, (d) AMB, and (e) HMB needles during the insertion.