Diagnosis by means of fluorescent light emission from tissue

US5115137A · kind A · utility

Assignee

• Spectraphos AB · SE

Inventors

• Stefan Andersson-Engels · Dupnitsa, BG
• Jonas Johansson · Delta, CA
• Unne Stenram · Lund, SE
• Katarina Svanberg · Lund, SE
• Sune Svanberg · Lund, SE

Key dates

• Filing date: Nov 28, 1990
• Grant date: May 19, 1992
• Expiry date: Nov 28, 2010

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2021/6421
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sample (1) is irradiated by a pulse from a laser (2), creating fluorescence radiation, which is brought, in imaging relation or otherwise, to a detector (6) sensing from the same sample (1) in a plurality of spectral intervals (6A-6D), for obtaining intensity values. The radiation may be sensed in imaging relation, creating a multiplicity of said pluralities. The spectral intervals may be wavelength defined by passband filters (5A-5D) or time interval defined time spectral intervals controlled by a computer (7), which makes a numerical evaluation comprising a division. The tissue character may then be evaluated from the evaluation.