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Light Penetration Depth in Brain with Different Photosensitizers

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Light Penetration Depth in Brain with Different Photosensitizers

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Glioblastoma is the most aggressive and lethal brain cancer with an average prognosis of 15 months. Fluorescence-guided surgery (FGS) for glioblastoma was FDA-approved in 2017, while photodynamic therapy (PDT) remains an active area of clinical investigation with very promising results so far. The aim of PDT is to eradicate the invasive cancer cells within 2 cm of the resected area where the glioblastoma most often recurs. However, a significant hurdle of this therapy modality is the limited light penetration depth in brain tissue.

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