System for detecting infectious agents using computer-controlled automated image analysis

• US 7,991,213 B2
• Filed: 02/07/2011
• Issued: 08/02/2011
• Est. Priority Date: 06/04/2001
• Status: Expired due to Fees

• Current Assignee: Ikonisys, Inc.
• Original Assignee: Ikonisys, Inc.
• Inventors: Kilpatrick, Michael, Tsipouras, Petros, Tafas, Triantafyllos P.
• Primary Examiner(s): Carter; Aaron W
• Application Number:
  US13/022,348
• Publication Number:
  US 20110129138A1
• Time in Patent Office: 176 Days
• Field of Search: 382128-134, 435/4, 435 72- 737, 424/9.6
• US Class Current: 382/133
• CPC Class Codes: C12Q 1/04 Determining presence or kind of microorganism; Use of selective media for testing antibiotics or bacteriocides; Compositions containing a chemical indicator therefor C12Q1/6897 takes precedence
• CPC Class Codes: G01N 15/1433 using image recognition
• CPC Class Codes: G06T 2207/30024 Cell structures in vitro; Tissue sections in vitro
• CPC Class Codes: G06T 7/0012 Biomedical image inspection
• CPC Class Codes: G06V 20/69 Microscopic objects, e.g. biological cells or cellular parts
• CPC Class Codes: G06V 20/698 Matching; Classification

Abstract

A method for recognizing an object in an image is disclosed wherein a fractal map of the image is generated by estimating the fractal dimension of each pixel in the image. The fractal map may be segmented by thresholding and locations of candidate objects are determined. The pixel value of the image pixel corresponding to the same location where the candidate object is found in the fractal map may be compared to a threshold value. If the pixel value is greater than the threshold value, the candidate object is recognized as a valid object.

Claims

1. A computer software product, comprising a non-transitory computer-readable storage medium having fixed therein a sequence of instructions which, when executed by a computer, direct the performance of a method which comprises:

acquiring a first signal emitted by a fluorescent dye, excited by an incoherent light source, said dye bound to an infectious agent of interest contained in a monolayer of a biological sample smeared across an area of a microscope slide;

detecting, quantifying, and recording the abundance of said first signal emitted by said fluorescent dye across a defined area of said smeared area; and

acquiring a second signal indicative of a cell in said biological sample known to be a target of said infectious agent;

detecting, quantifying, and recording the abundance of said second signal emitted across said defined area of said smeared area; and

comparing said abundance of said first signal with abundance of said second signal emitted over said defined area in using such comparative information in combination with information relating to the physical or physiological state of said patient to determine a prognosis of susceptibility or diagnosis of a disease or disorder associated with said infectious agent.

2. The computer software product of claim 1, wherein said infection agent of interest is a bacterium, mycoplasma, richkettsia, a spirochete, a fungus, a protozoal parasite, a virus or a prion.

3. The computer software product of claim 2, wherein said infection agent of interest is Chlamydia sp. and the disorder is a vascular disorder.

4. The computer software product of claim 2, wherein said infection agent of interest is Borrelia sp.

5. The computer software product of claim 1, wherein the method further comprises calculating the extent of each cell occupied by said infectious agent.

6. The computer software product according to claim 1, further comprising a computer-readable storage medium having fixed therein a sequence of instructions which, when executed by a computer, detect or detect and quantify an infectious agent in an animal cell using a method wherein an optical field of an entire slide is recorded and quantitatively assessed.

7. The computer software product according to claim 1, further comprising a computer-readable storage medium having fixed therein a sequence of instructions which, when executed by a computer, detect or detect and quantify an infectious agent in an animal cell using a method wherein all monocytes on a slide have been recorded.