power Doppler ultrasound
Also written as: PD
An ultrasound technique that detects blood flow within inflamed synovial tissue, used to assess joint inflammation in pediatric rheumatology.
Full Definition
Power Doppler ultrasound is an advanced imaging modality that detects increased blood flow (hyperemia) within synovial tissue, indicating active inflammation. This non-invasive technique is particularly valuable in pediatric rheumatology for assessing joint inflammation, monitoring treatment response, and detecting subclinical synovitis. Power Doppler is more sensitive than clinical examination for detecting active inflammation and can guide treatment decisions. The technique is well-tolerated by children and provides real-time assessment of disease activity without radiation exposure.
Usage
Usage note: Often abbreviated as PD in imaging reports; more sensitive than color Doppler for detecting slow flow in inflamed tissue.
In Context
- "Power Doppler ultrasound revealed active synovitis despite minimal clinical findings on examination." — Imaging report
- "The absence of power Doppler signal suggested treatment was effectively controlling joint inflammation." — Treatment monitoring note