Fig. 9: Photoacoustic imaging using Fiber Bragg grating sensor detection.
From: Advancements in photoacoustic detection techniques for biomedical imaging
a Schematic of the FBG-based photoacoustic endoscopy. b In-vivo PA sO2 images of a rat rectum during acute inflammation (baseline and 90 min. after inflammation induction). Reprinted with permission from ref. 116. Available under a CC BY 4.0 License https://creativecommons.org/licenses/by/4.0/. c Schematic of the silicon-photonics acoustic detector and photograph of the silicon-photonics chip and the assembled sensor. d Schematic of PA imaging setup. e The PA MAP image of in-vivo mouse ear. Reprinted with permission from117. Available under a CC BY 4.0 License https://creativecommons.org/licenses/by/4.0/. f Schematic of a EER sensor including fabrication steps. g Schematic of PA imaging setup. Reprinted with permission from ref. 118. Available under a CC BY 4.0 License https://creativecommons.org/licenses/by/4.0/. h The 3D PA image of ex-vivo mouse ear. i Photograph of the PDMS-encapsulated microfiber US sensor. j Photograph, PA MAP, and PA 2D images of the mouse brain. Reprinted with permission from ref. 119. Available under a CC BY 4.0 License https://creativecommons.org/licenses/by/4.0/. FBG fiber Bragg grating, PA photoacoustic, sO2 oxygen saturation, MAP maximum amplitude projection, EER Bragg grating-embedded etalon resonator. The images are adapted with permission from refs. 116,117,118,119.
