Physics and Instrumentation for Duplex Scanning

Apr 15, 2017 by in CARDIOLOGY Comments Off on Physics and Instrumentation for Duplex Scanning

FIGURE 7.1. Mass and spring model for tissue mechanics. The ultrasound transmission properties of tissue can be derived by considering the tissue to be assembled from masses (representing tissue density)…

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Renal Duplex Scanning

Apr 15, 2017 by in CARDIOLOGY Comments Off on Renal Duplex Scanning

FIGURE 24.1. Arteriogram of atherosclerotic renal artery stenosis. The lesions are located in the proximal right and left renal artery segments and are associated with significant aortic involvement. There is…

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Upper Extremity Venous Thrombosis

Apr 15, 2017 by in CARDIOLOGY Comments Off on Upper Extremity Venous Thrombosis

FIGURE 20.1. Virchow’s triad of thrombus formation. First described by Paget and von Schrötter in the late 1800s and subsequently named the “Paget-Schrötter syndrome,” a significant fraction of cases of…

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Acute Lower Extremity Deep Vein Thrombosis

Apr 15, 2017 by in CARDIOLOGY Comments Off on Acute Lower Extremity Deep Vein Thrombosis

aRating scale: 1, 2, 3 usually not appropriate; 4, 5, 6 may be appropriate; 7, 8, 9 usually appropriate. Adapted from American College of Radiology ACR Appropriateness Criteria®, 2013.9 US,…

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Extracranial Carotid and Vertebral Arteries

Apr 15, 2017 by in CARDIOLOGY Comments Off on Extracranial Carotid and Vertebral Arteries

FIGURE 8.1. Transverse or cross-sectional images. A,B-mode image shows an eccentric plaque in the mid common carotid artery (CCA; arrow). B,Color-flow image of the carotid bifurcation shows the internal carotid…

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Intravascular Imaging

Apr 15, 2017 by in CARDIOLOGY Comments Off on Intravascular Imaging

FIGURE 31.1. Mechanical and phased array transducers. Mechanical transducer images may have artifact related to the wire position. (Courtesy of Boston Scientific Corporation, Natick, MA.) Both types of transducers have…

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Dialysis Access Procedures

Apr 15, 2017 by in CARDIOLOGY Comments Off on Dialysis Access Procedures

FIGURE 33.1. A,Polytetrafluoroethylene tubing used in early Scribner shunts. One side was placed in an artery (typically the radial or posterior tibial artery) and the other into an accompanying vein….

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Transcranial Duplex Imaging

Apr 15, 2017 by in CARDIOLOGY Comments Off on Transcranial Duplex Imaging

FIGURE 9.1. A stylized map of the main extracranial arteries (in blue), which will be considered inflow vessels, and the intracranial vessels (in green), which will be considered outflow vessels…

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Vascular Applications in Point of Care Ultrasound

Apr 15, 2017 by in CARDIOLOGY Comments Off on Vascular Applications in Point of Care Ultrasound

Although point of care ultrasound examinations can be performed with the standard, full-featured ultrasound systems used by ultrasound professionals (Fig. 27.1), these relatively expensive and complicated instruments are not typically…

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