8-peripheral arterial triplex ultrasound Cystic Adventitial Disease 9-peripheral arterial triplex ultrasound BAKER CYST 10-peripheral arterial triplex ultrasound Blind ended channels Pseudo-aneurysms closed-ended endo-leaks venous outflow occlusion of an organ (such as occlusive thrombosis or venous torsion) 11-peripheral arterial triplex ultrasound bypass graft surveillance triplex US 12-peripheral arterial triplex ultrasound vascular trauma 13-peripheral arterial triplex ultrasound postoperative ischemia triplex ultrasound 14-peripheral arterial triplex ultrasound arterial aneurysm Popliteal artery aneurysm Saccular aneurysm Double aneurysm Fusiform aneurysm False aneurysm pseudoaneurysm Thoracic aortic aneurysm abdominal aortic aneurysm 15-peripheral arterial triplex ultrasound lerich 16-peripheral arterial triplex ultrasound arterial steal syndrome Vertebral Artery Doppler with Subclavian carotid Steal Steal phenomena (radiocephalic dialysis fistula to the radial artery) steal phenomena (congenital arterio-venous malformations) 17-peripheral arterial triplex ultrasound Complex Regional Pain Syndrome (CRPS) CRPS I (reflex sympathetic dystrophy) 18-peripheral arterial triplex ultrasound vascular compression Popliteal artery entrapment syndrome (PAES) Popliteal Pseudo-entrapment syndrome Thoracic Outlet Syndrome Paget-Schroetter Syndrome Quadrilateral Space Syndrome Median Arcuate Ligament Syndrome NUTCRACKER SYNDROME May-Thurner (Cockett) Syndrome Popliteal venous compression 19-cardaic effects on peripheral vascular Doppler 20-peripheral arterial triplex ultrasound artifact pitfalls Wall filter errors Spectral Doppler Scale errors Incorrect Color Scales Incorrect Color Steering/Angle Aliasing Doppler Sample Volume errors Perivascular Tissue Artifact (Visible Bruit) Flash Artifact color in Nonvascular Structures Excessive Doppler Gain , Overgaining Color Bleeding , Overwriting Undergaining Color Twinkle Artifact Vascular-Motion Artifact Mirror Image Artifact Directional Ambiguity Grating Side-Lobe Artifact Spectral broadening Artifact Incorrect Specification of Flow Direction (Doppler Angle) Incorrect Doppler Operating Frequency Refractive shadowing (Edge artifact Lateral cystic shadowing) Pseudoflow reverberation artifact partial volume averaging