Fibrous capsule measurement for coated devices

Analysis of fibrous capsules is a common procedure in evaluation of coated devices.  Microvessel analysis was tested for use in identifying the fibrous capsule differences between a novel coating and a control polypropylene in a subcutaneous rodent implant model.

Two immunofluorescent images comparing novel coating with
Confirmation of a novel coating onto polypropylene mesh. Anti-fibronectin immunofluorescent staining of uncoated control (left) and surface treated (right).

 

 

Histopath images showing control polypropylene versus surface treated
Control polypropylene (left) versus surface treated (right)

Microvessel algorithm was modified to detect the fibrous capsule, as shown below.

Image analysis results of use of angiogenesis algorithm in fibrous capsule detection
Representative markup image of fibrous capsule surrounding polypropylene fibers

In this example, as in almost all image analysis problems, the goal is to get from images to data. Below is some example output, there clearly is a measurable difference in fibrous capsule area between the new biosurface and the control.  More samples would be required to access statistical significance.

quantitative differences in the new biosurface material