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(a) The catheters with a cylindrical diffusing fiber (CDF) and isotropic detector for the interstitial PDT, measurement of the light fluence rate (), tissue optical properties, and HPPH concentration in a mouse bearing radiation-induced fibrosarcoma (RIF) tumor. (b) Hematoxylin and eosin staining of a tumor section treated with HPPH-PDT. The green contour shows the necrotic region induced by PDT.
