Quality is the penetrating power of the x-ray beam.

From a transtemporal window, a Duplex image was obtained with a posterior transducer angulation. What vessel and segment is being evaluated?   

Tests autoregulation or the brain’s ability to hemodynamically regulate blood flow based on changes in CO2.

Which of the following is NOT a diagnostic finding found with external to internal carotid collateral flow?

A patient presents with a common iliac artery occlusion with reconstitution of flow at the external iliac artery. Which of the following vessels should be assessed for potential retrograde flow to provide blood supply to the external iliac artery?

Transcutaneous Oximetry (TcPO₂) diagnostic criteria associated with poor healing potential. 

A patient with a history of tibial artery surgical repair after injury now presents with foot drop, tissue necrosis, and severe pain. What diagnosis is suspected?

Match the expected waveforms of an arteriovenous fistula (AVF). 

Which syndrome results in compression by fibrous bands or the medial head of the gastrocnemius muscle?

During Doppler evaluation of the abdominal aorta, two flow channels are noted. What do these findings suggest?