Methods of monitoring effects of chemical agents on a sample

• US 6,902,935 B2
• Filed: 12/15/2000
• Issued: 06/07/2005
• Est. Priority Date: 12/15/1999
• Status: Expired due to Fees

• Current Assignee: Luma Imaging Corp. (SpectraScience, Inc.)
• Original Assignee: MediSpectra, Inc. (SpectraScience, Inc.)
• Inventors: Flewelling, Ross, Kaufman, Howard, Schmid, Philippe, Zelenchuk, Alex, Hed, Ze'ev
• Primary Examiner(s): Snay, Jeffrey R.
• Application Number:
  US09/738,614
• Publication Number:
  US 20020197728A1
• Time in Patent Office: 1,635 Days
• Field of Search: 436/63, 436/64, 436/164, 436/172, 382128-131, 382/133, 382/134
• US Class Current: 436/63
• CPC Class Codes: A61B 1/00009 of image signals during a use of endoscope
• CPC Class Codes: A61B 1/0008 characterised by distal tip features
• CPC Class Codes: A61B 1/00142 with means for preventing contamination, e.g. by using a sanitary sheath
• CPC Class Codes: A61B 5/0071 by measuring fluorescence emission
• CPC Class Codes: A61B 5/0075 by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy A61B5/0071 takes precedence
• CPC Class Codes: A61B 5/0084 for introduction into the body, e.g. by catheters A61B5/1459 takes precedence
• CPC Class Codes: A61M 11/00 Sprayers or atomisers specially adapted for therapeutic purposes in general B05B; aerosol containers B65D83/14

Abstract

The invention provides methods and systems for monitoring effects of chemical agents on optical signals produced by samples in response to the chemical agents. Preferred methods comprise application of multiple chemical agents that interact to alter an optical signal from the sample. Methods and systems of the invention also comprise monitoring an optical signal from an endogenous chromophore upon application of a chemical agent to a sample. Methods and systems of the invention also comprise the use of triggers, atomizers and image alignment to enhance the results of methods described herein.

Claims

1. A method for monitoring effects of a chemical agent on a sample, the method comprising the steps of:

dispensing a chemical agent on a sample;

providing an automated triggering signal to initiate a measurement period relative to said dispensing step;

capturing a plurality of sequential images of said sample during said measurement period;

automatically aligning a subset of said plurality of images to compensate for sample motion; and

measuring an optical signal observed from said sample within said measurement period.

2. The method of claim 1, wherein said triggering signal is provided substantially simultaneously with said dispensing step.

3. The method of claim 1, wherein said triggering signal is provided after said dispensing step.

4. The method of claim 1, wherein said measuring step comprises measuring said optical signal at at least one predetermined time relative to said triggering signal.

5. The method of claim 1, wherein said dispensing step comprises dispensing said chemical agent as a mist in a predefined pattern on said tissue.

6. The method of claim 5, wherein said pattern is substantially circular.

7. The method of claim 5, wherein said pattern is substantially annular.

8. The method of claim 5, wherein said mist is a controlled volume.

9. The method of claim 5, wherein said dispensing occurs at a controlled rate.