High-Resolution Ultrasound Imaging of the Retina and Choroid for Detection on Age Related Macular Degeneration

Completed

• Conditions: Age Related Macular Degeneration
• Interventions: Procedure: Ultrasound examination

• Registration Number: NCT00277784
• Lead Sponsor: Weill Medical College of Cornell University

Brief Summary

The macula is the site of central vision within the retina. The retina is oxygenated by the underlying choroid. These tissues are less than 1 mm thick in total. While optical techniques can reveal much about the structure of the retina, ultrasound allows imaging of the choroid and deeper tissues. This study will investigate use of high frequency (20 MHz) ultrasound for imaging of the retina and choroid in patients with age-related macular degeneration, a prime cause of blindness. The investigation will involve use of novel post-processing methodologies to achieve maximum resolution of the fine tissue structures involved in this disease.

Detailed Description

Age-related macular degeneration (AMD), a condition affecting over 40% of individuals 70 years or age or more, causes progressive loss of central vision. Photocoagulation has long been used to slow the progress of AMD, but new vision-preserving methods are currently under investigation. Because destroyed photoreceptors are permanently lost, early management is essential for preservation of vision. The aim of this project will be to study AMD using a suite of new high-resolution ultrasound imaging techniques that have been developed. Specifically, high-resolution ultrasound will be used to generate images of the retina and choroid, including perfusion measurements using slow-flow methods developed by our research group. Ultrasound studies will be performed in conjunction with optical coherence tomography (OCT) imaging in a series of patients and age-matched control subjects with the aim of determining if choroidal thickness and/or perfusion might be used as an early indicator of AMD and thus aid in patient management.

We will study 20 subjects diagnosed with AMD. We will attempt to have an approximately equal number of subjects with wet and dry forms of AMD. A control group consisting of 20 non-AMD age-matched subjects will also be recruited. Ultrasound scan sequences will consist of B-mode images of the macula and surrounding tissues.

Study Timeline

• Study Start: 2005-07
• Study First Submitted: 2006-01-12
• Study First Submitted QC: 2006-01-12
• Study First Posted: 2006-01-16
• Primary Completion: 2006-06
• Study Completion: 2006-06
• Status Verified: 2008-03
• Last Update Submitted: 2008-03-04
• Last Update Posted: 2008-03-07

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 40

Inclusion Criteria

Age related macular degeneration age matched control

Exclusion Criteria

none

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
1	Ultrasound examination	Individuals with age related macular degeneration

Trial Locations

Locations (1)

Weill Cornell Medical College; 🇺🇸 New York, New York, United States