[1] Wang L V, Hu S. Photoacoustic tomography: in vivo imaging from organelles to organs[J]. Science, 335, 1458-1462(2012).

[2] Steinberg I, Huland D M, Vermesh O et al. Photoacoustic clinical imaging[J]. Photoacoustics, 14, 77-98(2019).

[3] Lin L, Wang L V. The emerging role of photoacoustic imaging in clinical oncology[J]. Nature Reviews Clinical Oncology, 19, 365-384(2022).

[4] Qin Z Z, Sun M J, Ma Y M et al. Intelligent denoising algorithm for signals based on three-dimensional photoacoustic tomography system[J]. Laser & Optoelectronics Progress, 59, 0811006(2022).

[5] Shen K, Liu S D, Shi J H et al. Dual-domain neural network for sparse-view photoacoustic image reconstruction[J]. Chinese Journal of Lasers, 49, 0507208(2022).

[6] Zeng S L, Liu L J, Chen T et al. Acoustically resolved bilateral excitation photoacoustic microscopy imaging technology[J]. Chinese Journal of Lasers, 49, 1507201(2022).

[7] Lei T C, Gao R K, Liu C B. Application of synthetic aperture technology in photoacoustic imaging[J]. Laser & Optoelectronics Progress, 59, 0617007(2022).

[8] Wan Y Y, Lei P, Xiong K D et al. Intravascular photoacoustic, ultrasonic, optical coherence tomography, and photoacoustic elastic multimodal imaging method and system[J]. Chinese Journal of Lasers, 50, 0307107(2023).

[9] Ge X X, Cui H T, Kong J et al. A non-invasive nanoprobe for in vivo photoacoustic imaging of vulnerable atherosclerotic plaque[J]. Advanced Materials, 32, 2000037(2020).

[10] Ma Y, Xu L, Yin B L et al. Ratiometric semiconducting polymer nanoparticle for reliable photoacoustic imaging of pneumonia-induced vulnerable atherosclerotic plaque in vivo[J]. Nano Letters, 21, 4484-4493(2021).

[11] Pan D, Cai X, Yalaz C et al. Photoacoustic sentinel lymph node imaging with self-assembled copper neodecanoate nanoparticles[J]. ACS Nano, 6, 1260-1267(2012).

[12] Dai Y F, Yu X, Wei J S et al. Metastatic status of sentinel lymph nodes in breast cancer determined with photoacoustic microscopy via dual-targeting nanoparticles[J]. Light: Science & Applications, 9, 164(2020).

[13] Chen J Q, Qi J, Chen C et al. Tocilizumab-conjugated polymer nanoparticles for NIR-II photoacoustic-imaging-guided therapy of rheumatoid arthritis[J]. Advanced Materials, 32, 2003399(2020).

[14] Chen J H, Zeng S L, Xue Q et al. Photoacoustic image-guided biomimetic nanoparticles targeting rheumatoid arthritis[J]. Proceedings of the National Academy of Sciences of the United States of America, 119, e2213373119(2022).

[15] Liu Y B, Xu M Z, Dai Y L et al. NIR-II dual-modal optical coherence tomography and photoacoustic imaging-guided dose-control cancer chemotherapy[J]. ACS Applied Polymer Materials, 2, 1964-1973(2020).

[16] Gong F, Yang N L, Wang Y et al. Oxygen-deficient bimetallic oxide FeWOX nanosheets as peroxidase-like nanozyme for sensing cancer via photoacoustic imaging[J]. Small, 16, 2003496(2020).

[17] Wang S L, Zhang L L, Zhao J J et al. A tumor microenvironment-induced absorption red-shifted polymer nanoparticle for simultaneously activated photoacoustic imaging and photothermal therapy[J]. Science Advances, 7, eabe3588(2021).

[18] Song J, Kim J, Hwang S et al. “Smart”gold nanoparticles for photoacoustic imaging: an imaging contrast agent responsive to the cancer microenvironment and signal amplification via pH-induced aggregation[J]. Chemical Communications, 52, 8287-8290(2016).

[19] Lu X M, Zhao M, Chen P F et al. Enhancing hydrophilicity of photoacoustic probes for effective ratiometric imaging of hydrogen peroxide[J]. Journal of Materials Chemistry B, 6, 4531-4538(2018).

[20] Ma G C, Gao X T, Jiang C et al. pH-responsive nanoprobe for in vivo photoacoustic imaging of gastric acid[J]. Analytical Chemistry, 91, 13570-13575(2019).

[21] Choi W, Park B, Choi S et al. Recent advances in contrast-enhanced photoacoustic imaging: overcoming the physical and practical challenges[J]. Chemical Reviews, 123, 7379-7419(2023).

[22] Taruttis A, Ntziachristos V. Advances in real-time multispectral optoacoustic imaging and its applications[J]. Nature Photonics, 9, 219-227(2015).

[23] Roberts S, Seeger M, Jiang Y Y et al. Calcium sensor for photoacoustic imaging[J]. Journal of the American Chemical Society, 140, 2718-2721(2018).

[24] Peters L, Weidenfeld I, Klemm U et al. Phototrophic purple bacteria as optoacoustic in vivo reporters of macrophage activity[J]. Nature Communications, 10, 1191(2019).

[25] Yao J J, Kaberniuk A A, Li L et al. Multiscale photoacoustic tomography using reversibly switchable bacterial phytochrome as a near-infrared photochromic probe[J]. Nature Methods, 13, 67-73(2016).

[26] Li L, Shemetov A A, Baloban M et al. Small near-infrared photochromic protein for photoacoustic multi-contrast imaging and detection of protein interactions in vivo[J]. Nature Communications, 9, 2734(2018).

[27] Mishra K, Stankevych M, Fuenzalida-Werner J P et al. Multiplexed whole-animal imaging with reversibly switchable optoacoustic proteins[J]. Science Advances, 6, eaaz6293(2020).

[28] Ma C S, Kuang X, Chen M M et al. Multiscale photoacoustic tomography using reversibly switchable thermochromics[J]. Journal of Biomedical Optics, 28, 082804(2023).

[29] Gao R K, Liu F, Liu W F et al. Background-suppressed tumor-targeted photoacoustic imaging using bacterial carriers[J]. Proceedings of the National Academy of Sciences of the United States of America, 119, e2121982119(2022).

[30] Yao J J, Wang L V. Recent progress in photoacoustic molecular imaging[J]. Current Opinion in Chemical Biology, 45, 104-112(2018).

[31] Wang L D, Zhang C, Wang L V. Grueneisen relaxation photoacoustic microscopy[J]. Physical Review Letters, 113, 174301(2014).

[32] Tian C, Xie Z X, Fabiilli M L et al. Dual-pulse nonlinear photoacoustic technique: a practical investigation[J]. Biomedical Optics Express, 6, 2923-2933(2015).

[33] Tian C, Xie Z X, Fabiilli M L et al. Imaging and sensing based on dual-pulse nonlinear photoacoustic contrast: a preliminary study on fatty liver[J]. Optics Letters, 40, 2253-2256(2015).

[34] Shi J H, Wong T T W, He Y et al. High-resolution, high-contrast mid-infrared imaging of fresh biological samples with ultraviolet-localized photoacoustic microscopy[J]. Nature Photonics, 13, 609-615(2019).

[35] Lan H R, Duan T Y, Jiang D H et al. Dual-contrast nonlinear photoacoustic sensing and imaging based on single high-repetition- rate pulsed laser[J]. IEEE Sensors Journal, 19, 5559-5565(2019).

[36] Shi J W, Li C, Mao H D et al. Grüneisen-relaxation photoacoustic microscopy at 1.7 µm and its application in lipid imaging[J]. Optics Letters, 45, 3268-3271(2020).

[37] Lai P X, Wang L D, Tay J W et al. Photoacoustically guided wavefront shaping for enhanced optical focusing in scattering media[J]. Nature Photonics, 9, 126-132(2015).

[38] Liu X W, Wong T T W, Shi J H et al. Label-free cell nuclear imaging by Grüneisen relaxation photoacoustic microscopy[J]. Optics Letters, 43, 947-950(2018).

[39] Zhou Y, Li M C, Liu W et al. Thermal memory based photoacoustic imaging of temperature[J]. Optica, 6, 198-205(2019).

[40] Wang L V, Wu H I[M]. Biomedical optics: principles and imaging(2007).

[41] Robles F E, Chowdhury S, Wax A. Assessing hemoglobin concentration using spectroscopic optical coherence tomography for feasibility of tissue diagnostics[J]. Biomedical Optics Express, 1, 310-317(2010).

[42] Zhang H, Zeng S L, Wu Y Z et al. Handheld photoacoustic imaging of indocyanine green clearance for real-time quantitative evaluation of liver reserve function[J]. Biomedical Optics Express, 14, 3610-3621(2023).

[43] Khadria A, Paavola C D, Maslov K et al. Photoacoustic imaging reveals mechanisms of rapid-acting insulin formulations dynamics at the injection site[J]. Molecular Metabolism, 62, 101522(2022).

[44] Hwang Y, Yoon H, Choe K et al. In vivo cellular-level real-time pharmacokinetic imaging of free-form and liposomal indocyanine green in liver[J]. Biomedical Optics Express, 8, 4706(2017).

[45] Wood C A, Han S, Kim C S et al. Clinically translatable quantitative molecular photoacoustic imaging with liposome-encapsulated ICG J-aggregates[J]. Nature Communications, 12, 5410(2021).

[46] Yang Y, Huang J S, Wei W et al. Switching the NIR upconversion of nanoparticles for the orthogonal activation of photoacoustic imaging and phototherapy[J]. Nature Communications, 13, 3149(2022).

[47] Jeevarathinam A S, Lemaster J E, Chen F et al. Photoacoustic imaging quantifies drug release from nanocarriers via redox chemistry of dye-labeled cargo[J]. Angewandte Chemie International Edition, 59, 4678-4683(2020).

[48] Xu X M, Wu H Y, Yang Y et al. PLGA-coated methylene blue nanoparticles for photoacoustic imaging and photodynamic/photothermal cascaded precisely synergistic therapy of tumor[J]. RSC Advances, 12, 1543-1549(2022).