
ALT A summary of the DUET score. 1A. The DUET score formula is calculated based on a three bilateral entheseal locations, for a total of six sites: the Achilles and triceps insertions, and the patellar ligament insertion to the inferior pole of the patella. 1B-E. Depiction of selected elementary lesions and their corresponding DUET scores: 1B. Achilles tendon insertion showing thickening (1 point, vertical orange line) and enthesophyte (3 points, blue arrow); 1C. Achilles tendon insertion with erosion (1 point × 3, white arrow); 1D. Triceps tendon insertion with hypoechogenicity (1 point, yellow arrow) and enthesophyte (3 points, blue arrow); 1E. Patellar ligament insertion to the patella showing positive power Doppler signal. The power Doppler signal involves the area close to the bone (indicated by the orange marking), but the grading also accounts for Doppler intensity extending beyond this marking (3 points × 2)



































