Early assessment of sub-surface bladder tumor extension is challenging as there are no acceptable imaging modalities to determine sub-surface three-dimensional (3D) tumor extension. Current existing cystoscopy guided transurethral resection technique is limited on direct visualization of tumor surface. In this paper, a multi-modal optical imaging modality combing high-resolution optical coherence tomography (OCT) and depth-resolved high-sensitivity fluorescence laminar optical tomography (FLOT) for structural and molecular imaging was developed. Bladder tissues from UPII-SV40T mice model were imaged by the multi-modal system ex vivo and sub-surface tumor extension was reconstructed. Algorithm was developed to further quantified 3D bladder tumor morphology and molecular alterations.
Three-dimensional (3D) cell culture models are developed as a promising platform to screen anticancer therapeutics and treatments. However, current imaging techniques cannot provide 3D structures of tumor spheroids in situ. In this study, we employed label-free and noninvasive optical coherence tomography (OCT) for imaging and quantifying the 3D structures of tumor spheroids. We imaged ovarian cancer spheroids with OVCAR-8 cell line over a period of 10 days with 5,000 and 50,000 initial cell numbers. We successfully reconstructed the 3D necrotic regions via label-free intrinsic scattering attenuation contrast and evaluated the effect of Cisplatin treatment on tumor spheroids.
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