Table 1

Imaging modalities in RS3PE

Imaging modality	Characteristics that help to establish a diagnosis of RS3PE	Comments
X-ray	Erosions are classically absent.	Most commonly used. Easily available. Cost-effective.
Ultrasonography	Tenosynovitis.*	Easily available and cost-effective.
Contrast-enhanced color Doppler ultrasound	Hypervascularity in tendons and joints. Useful for inflammatory edema, synovitis and effusion.*	Reliable, easily accessible, cost-effective.
MRI	Best method for detection of small amounts of effusion.	Availability and costs may limit its use.