Photodynamic therapy with spatially resolved dual spectroscopic monitoring
US9044140B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2005 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Jul 12, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N5/062
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An instrument for photodynamic therapy applies treatment light from a dye laser, white light, and ultraviolet fluorescence excitation light from an LED onto a lesion and surrounding areas in a time-multiplexed manner. The reflected white light is analyzed in a spectrometer to determine a correction for the dynamic optical spectral properties of the patient's tissue. Light emitted by fluorescence from the lesion and the surrounding areas is analyzed in another spectrometer, and the results are corrected in a computer, using the correction. An optical switch has been developed for the instrument, using a bistable solenoid and a sled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.