Although several optical imaging modalities can acquire high-resolution images, the light penetration depth is limited because optical scattering occurs in a tissue, making it difficult to acquire deep-depth images. For this reason, we previously suggested and verified that ultrasound-induced optical clearing microscopy (US-OCM) can suppress optical scattering and improve the depth of light penetration. However, it is challenging to accurately predict the nucleation position of a bubble cloud due to randomly generated within the depth of focus. In this study, we proposed a combined acoustic and optical cavitation-induced gas bubbles method that can generate a bubble cloud at an accurately predicted location, and demonstrate image performance through various experiments.
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