“…Most studies used both grayscale and power Doppler ultrasound, whereas some used multiple ultrasonography settings to detect flow, including color Doppler, spectral Doppler, and superb microvascular imaging, either to confirm power Doppler signals 8,11,13,26,29,30,32,33,36,38 or compare ultrasonography techniques. 22,27,37 The majority of studies used electrodiagnostic studies for confirmation of diagnosis, stratification of patients by disease severity, or comparison with ultrasonographic results. Studies involving longitudinal follow-up evaluated power Doppler ultrasound at multiple time points, ranging from 1 week to 36 months after treatment.…”