Patent ID: 9044140
Filing Date: 2015-06-02
Classification: A61B,A61N

Abstract:
1. An instrument for performing photodynamic therapy on a treatment area comprising a target lesion and a perilesion margin of a living patient, the instrument comprising: light sources for providing treatment light for activating photoactive drugs within the treatment area, broadband light for creating a first reflected light spectrum from the target lesion and a second reflected light spectrum from the perilesion margin, and fluorescence excitation light for creating a first fluorescence from the target lesion and a second fluorescence from the perilesion margin; first optics for causing the treatment light, the broadband light and the fluorescence excitation light to be incident on the treatment area, whereby the broadband light is reflected from the treatment area and the fluorescence excitation light causes the treatment area to emit fluorescence; second optics for receiving the first reflected light spectrum from the target lesion and the second reflected light spectrum from the perilesion margin and the first fluorescence from the target lesion and the second fluorescence from the perilesion margin; a first spectrometer for receiving the first reflected light spectrum and the second reflected light spectrum from the second optics and for producing a signal representing the first reflected light spectrum and the second reflected light spectrum; a second spectrometer for receiving the first fluorescence and the second fluorescence from the second optics and for producing a signal representing the first fluorescence and the second fluorescence; and a computer, receiving the signals from the first and second spectrometers, for correcting the spectrum of the first fluorescence and the second fluorescence in accordance with the first reflected light spectrum and the second reflected light spectrum respectively and for providing the corrected first fluorescence and second fluorescence light spectrum for treatment optimization.