The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 2000
Filed:
Aug. 25, 1998
Applicant:
Inventor:
Merrill A Biel, Mendota Heights, MN (US);
Assignee:
Advanced Photodynamic Technologies, Inc., Mendota Heights, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ; G01N / ;
U.S. Cl.
CPC ...
424-96 ; 424-97 ; 424-98 ; 436172 ; 436800 ;
Abstract
A method for differentiating between normal tissue and tumor tissue within a tissue field. The method includes the application of a photosensitizer solution to the tissue field and the subsequent illumination and measurement of fluorescent intensity across the tissue field. The measurement of relative fluorescent intensity across the tissue field provides information relating to the existence or nonexistence of tumor tissue. Solution concentrations of methylene blue and or toluidene blue are utilized to provide the greatest differentiability between normal tissue and tumor tissue within the tissue field.