Katarina Svanberg M.D.,1 Ingrid Wang-Nordman,1 R. Rydell,1 A. Elner,1 J. Wennerberg,1 Laudelina C. Pais Clemente,2 E. Cardosa,2 R. Pratas,2 Manuel P. Pais Clemente,2 Stefan Andersson-Engels,3 Sune Svanberg3
1Lund Univ. Hospital (Sweden) 2Porto Univ. Hospital (Portugal) 3Lund Institute of Technology (Sweden)
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Tissue fluorescence measurements utilizing a point monitoring fluorosensor and a multi-color fluorescence imaging system were performed in patients with various malignant tumors in the head and neck region. Also precancerous lesions were investigated and characterized by means of laser-induced fluorescence. Oral administration of low-dose (delta) -amino levulinic acid was used for the induction of protoporphyrin IX, which exhibits a strong fluorescence in the red wavelength region. The blue-green fluorescence emitted from the tissue natural chromophores was also utilized for tumor demarcation. By incorporating both Protoporphyrin IX and natural fluorescence in a tumor demarcation criterion a tumor demarcation with a tumor-to-normal-surrounding-tissue of about 5 - 10:1 contrast was achieved. Hypertrophic tissue did not exhibit tumor specific signals.
Katarina Svanberg M.D.,Ingrid Wang-Nordman,R. Rydell,A. Elner,J. Wennerberg,Laudelina C. Pais Clemente,E. Cardosa,R. Pratas,Manuel P. Pais Clemente,Stefan Andersson-Engels, andSune Svanberg
"Fluorescence diagnostics of head and neck cancer utilizing oral administration of delta-amino levulinic acid", Proc. SPIE 2371, 5th International Photodynamic Association Biennial Meeting, (1 March 1995); https://doi.org/10.1117/12.203438
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Katarina Svanberg M.D., Ingrid Wang-Nordman, R. Rydell, A. Elner, J. Wennerberg, Laudelina C. Pais Clemente, E. Cardosa, R. Pratas, Manuel P. Pais Clemente, Stefan Andersson-Engels, Sune Svanberg, "Fluorescence diagnostics of head and neck cancer utilizing oral administration of delta-amino levulinic acid," Proc. SPIE 2371, 5th International Photodynamic Association Biennial Meeting, (1 March 1995); https://doi.org/10.1117/12.203438