title: Spectroscopic evaluation of photodynamic therapy of the intraperitoneal cavity.
abstract: We present the results of spectroscopic measurements of diffuse reflectance and fluorescence before and after photodynamic therapy of healthy canine peritoneal cavity. Animals were treated intra-operatively after iv injection of the benzoporphyrin derivative (BPD). The small bowel was treated using a uniform light field projected by a microlenstipped fiber. The cavity was then filled with scattering medium and the remaining organs were treated using a moving diffuser. Diffuse reflectance and fluorescence measurements were made using a multi-fiber optical probe positioned on the surface of various tissues within the cavity before and after illumination. The measured data were analyzed to quantify hemoglobin concentration and oxygenation and sensitizer concentration.
authors.affiliation: Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA USA 19104.
authors.forename: Jarod C
authors.initials: JC
authors.lastname: Finlay
authors.affiliation: Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA USA 19104.
authors.forename: Julia L
authors.initials: JL
authors.lastname: Sandell
authors.affiliation: Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA USA 19104.
authors.forename: Timothy C
authors.initials: TC
authors.lastname: Zhu
authors.affiliation: Department of Surgery, University of Pennsylvania, Philadelphia, PA USA 19104.
authors.forename: Robert
authors.initials: R
authors.lastname: Lewis
authors.affiliation: Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA USA 19104.
authors.forename: Keith A
authors.initials: KA
authors.lastname: Cengel
authors.affiliation: Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA USA 19104.
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Hahn
keywords: Benzoporphyrin; diffuse reflectance; fluorescence; photodynamic therapy