The Study of Human Atherosclerosis by Polarization-Sensitive Optical Coherence Tomography

• Conditions: Pathological Conditions, Anatomical

• Registration Number: NCT00173238
• Lead Sponsor: National Taiwan University Hospital

Brief Summary

Atherosclerosis is unquestionably the leading cause of morbidity and mortality in developed countries, and the world-wide importance of acute vascular syndromes is increasing. Rupture of atherosclerotic plaque has been identified as the proximate event in the majority of cases of acute ischemic syndromes. Therefore, modalities capable of characterizing the atherosclerotic lesion may be helpful in understanding its natural history and detecting lesions with high risk for acute events.

Optical coherence tomography (OCT) is a powerful tool capable of tomographic imaging based on low coherence interferometry. It is analogous to ultrasound imaging except that it uses infrared light instead of sound. Polarization-sensitive optical coherence tomography (PS-OCT) combines the advantages of OCT with additional image contrast of the sample. The added contrast is based on the ability of PS-OCT to detect the birefringent properties of a sample (phase retardation and fast-axis orientation) simultaneously.

The goals of this project are: 1) to examine whether PS-OCT is an acceptable tool for the characterization of typical plaque constituents; and 2) to explain the correlation between birefringence and forming or rupture of a plaque; and 3) to establish a quantitative PS-OCT image criteria for atherosclerotic plaque characterization in vitro.

Detailed Description

Optical Coherence Tomography (OCT) is a promising new class of diagnostic medical imaging technology that utilizes advanced photonics and fiber optics to obtain images and tissue characterization on a scale never before possible within the human body. OCT combines the principles of ultrasound with the imaging performance of a microscope and a form factor that is familiar to clinicians. Whereas ultrasound produces images from backscattered sound "echoes," OCT uses infrared light waves that reflect off the internal microstructure within the biological tissues.

Study Timeline

• Status Verified: 2005-06
• Study Start: 2005-06
• Study First Submitted: 2005-09-12
• Study First Submitted QC: 2005-09-12
• Study First Posted: 2005-09-15
• Last Update Submitted: 2005-12-20
• Last Update Posted: 2005-12-21
• Study Completion: 2008-06

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 5

Inclusion Criteria

• Heart transplantation, atherosclerosis

Exclusion Criteria

• Infection

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Trial Locations

Locations (1)

National Taiwan University Hospital; 🇨🇳 Taipei, Taiwan