Texas Advanced Diabetic Retinopathy Screening System (TADRS)

The Texas Advanced Diabetic Retinopathy Screening System (TADRS) is a light-weight, computer based screening system of retinopathy. Using commercial, non-mydriatic fundus camera to acquire retinal images, TADRS is equipped with multiple modules to detect presence of common DR symptoms. Starting as a purely academic exercise in developing better blood vessel mapping algorithms, TADRS is expanded to handle a broad range of real world challenges that impact the detection performance.

Key features:

1. A light-weight, yet complete system which supports patient reception, image capturing, image management, lesion detection and reporting on a laptop class computer.
2. No pupil dilation required for most cases.
3. Multiple, expandable lesion modules (micro aneuysm, hemorrhage, hard exudates).
4. Fast algorithm: 5 seconds/image on PC with P4 processor.
5. Interlocked, dual display of original image and detection map to assist case review.

System Architecture:

1. Reception Unit: operated by the clinic receptionist to queue up patients’ requests for taking retinal images.
2. Fundus Camera & control computer: to be operated in a dark room for best effects.
3. Data Transfer Unit: secure transfer of the data to store and exchange data.
4. Lesion Detection Unit: detection of DR related lesions.
5. Case review Unit: Interlocked dual-image display to support case review by human experts.

Sample result of blood vessel and different type of lesions*

• Blood vessel Detection:
• Micro-Aneurysm Detection:
• Hard Exudates Detection