Optimizing ultrasound evaluation of carotid artery stenosis in Takayasu's Arteritis: a focus on residual inner diameter as a key parameter

In conclusion, this study provides standardized ultrasound diagnostic criteria for CCA stenosis in TAK, with the residual inner diameter emerging as the most reliable parameter. These findings have significant clinical implications for improving diagnostic accuracy, guiding treatment decisions, and monitoring disease progression in TAK patients. Future research should focus on validating these criteria in larger, multicenter studies to further enhance the management of TAK. Key Points • This study establishes residual inner diameteras the most reliable ultrasound parameter for assessing carotid artery stenosis in TAK, with high diagnostic accuracy across all stenosis categories. • Residual inner diameter demonstrated exceptional diagnostic superiority in evaluating carotid stenosis, particularly for moderate-to-severe cases. Its validated cutoff values achieved high sensitivity and specificity, aligning closely with CTA results. By providing clear, reproducible thresholds, residual inner diameter minimizes misdiagnosis and underdetection of high-risk stenosis.