A pilot study using "ROPtool" to quantify plus disease in retinopathy of prematurity

Area of Science:

• Ophthalmology
• Medical Imaging
• Computational Biology

Background:

• Accurate diagnosis of plus disease is crucial for timely laser treatment in premature infants.
• Current diagnostic methods for plus disease are subjective and prone to errors.
• ROPtool is a novel computer program designed to objectively analyze retinal vasculature.

Purpose of the Study:

• To pilot ROPtool for analyzing retinal blood vessel tortuosity and dilation.
• To determine the reliability and validity of ROPtool in diagnosing plus and pre-plus disease.
• To establish numerical thresholds for identifying plus and pre-plus disease using ROPtool.

Main Methods:

• Twenty high-quality retinal images from premature infants were analyzed.
• Two independent experts assessed tortuosity and dilation, establishing a standard for comparison.
• ROPtool was used by the same experts to analyze the images, with results compared to the expert standard.

Main Results:

• ROPtool demonstrated high inter-user agreement (95%) for tortuosity, surpassing investigator judgment (90%).
• Sensitivity and specificity for detecting plus disease at the eye level were 95% and 78%, respectively.
• Established thresholds for pre-plus disease showed 89% sensitivity and 82% specificity in distinguishing from normal vasculature.

Conclusions:

• ROPtool significantly reduces subjectivity in evaluating plus and pre-plus disease.
• The program enhances the objective assessment of retinal vascular abnormalities.
• ROPtool shows promise in improving the accuracy and consistency of diagnosis for ROP treatment.