In approximately 27% of patients with pulmonary embolism, Duplex ultrasonography is negative, and MRV may act as a complementary test to confirm pelvic or inferior vena cava (IVC) thrombosis.
Prospective study of color duplex ultrasonography compared with contrast venography in patients suspected of having deep venous thrombosis of the upper extremities.
The controls underwent duplex ultrasonography of the carotid arteries to exclude coexisting high-grade (luminal narrowing of 80% or greater) carotid stenosis.
The study, "Screening for Carotid Artery Stenosis with Power Doppler Imaging Using a Portable Duplex Ultrasonography Device," was conducted at Wake Forest University in Winston-Salem, North Carolina.
Two noninvasive means of evaluating renal artery stenosis and ISR are color duplex ultrasonography and multidetector computed tomographic angiography (MDCTA).