Research to Develop Biomedical Applications of Free Electron Laser Technology
Abstract
Specific Aim 1: Develop and test plaque characterization criteria based on bireftingence. Coronary artenes were obtained at autopsy and imaged with the existing OCT system in our laboratory. The specimens were opened and imaged at normal body temperature (37-C) in saline. To ensure proper registration of OCT images with histolog the image location was marked with ink viewable on the OCT image and in the histology section. Routine histologic processing was performed using H&E, Elastic and Movat's pentachrome stains. Trichrome was used for fibrous tissue identification. Individual images were oriented and scaled to match histology. In the OCT images, the axial periodicity of the birefringence banding was measured using image processing software. A set of 20 correlated OCT and histology pairs were used to identify characterization criteria basal on birefringence. Our results indicated that fibrous plaque provides a strong birefringence as measured by OCT while lipid rich and calcific plaques can be identified by a complete loss of birefringenee.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2004
- Accession Number
- ADA425688
Entities
People
- John A. Parrish
Organizations
- Massachusetts General Hospital