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MRA of the abdominal aorta and lower extremities

MRA of the abdominal aorta and lower extremities,10.1002/(SICI)1522-2586(200001)11:1<32::AID-JMRI5>3.0.CO;2-W,Journal of Magnetic Resonance Imaging,Th

MRA of the abdominal aorta and lower extremities   (Citations: 20)
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Journal: Journal of Magnetic Resonance Imaging - J MAGN RESON IMAGING , vol. 11, no. 1, pp. 32-43, 2000
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    • ...The most commonly used are 2D-TOF MRA and 3Dcontrast-enhanced methods [7]...
    • ...Department of Diagnostic Radiology, University Hospital, Philipps University, Marburg, Germany image and to allow images to be acquired more rapidly [7], both of which should result in an improvement in overall accuracy of the technique...
    • ...Fast spoiled gradient echo acquisitions with 3D contrastenhanced MRA have been proven as a non-invasive tool for the evaluation of the renal arteries [1, 7]. To obtain a useful contrast-enhanced MR angiogram with gadoliniumbased contrast agent, the intravascular concentration of contrast agent must be kept at a sufficient level throughout image acquisition...
    • ...In clinical practice, a double dose of contrast agent is frequently administered [7]...

    J. T. Heverhagenet al. Dose comparison of single versus double dose in contrast-enhanced magn...

    • ...MR angiography has a specificity of 100% and sensitivity of 100% for such pre-operative information [16, 17, 24, 37, 46]...
    • ...Spin-echo techniques can provide information regarding the aneurysm wall and tissues external to the aneurysm, while simultaneously evaluating the luminal diameter, and can detect intraluminal thrombus as intermediate signal intensity within the lumen of the aorta [16]...

    N. Miyazawaet al. Risk factors for the association of intracranial and aortic aneurysms

    • ...Numerous studies have demonstrated its accuracy [5, 6], as well as its limitations, which include operator-dependency [7], hospital variations [8, 9], variability in parameter choice [10], susceptibility to artifacts from calcified plaques, and difficulties in distinguishing near-total occlusion...
    • ...Lee et al. [9] 1998 23 2D Gd-enhanced 94% 91% NR Swan et al. [10] 2002 69 3D Gd-enhanced 89% 91% NR...

    Philippe C. Douek. MultiHance in MRA of peripheral vasculature

    • ...Recent studies demonstrate that CE MRA can replace intra-arterial angiography in the evaluation of the abdominal aorta and their major branches [15, 16]...

    U. Fischeret al. [Without Title]

    • ...MRA also has advantages compared to color Doppler ultrasound because of less dependence on the operator and lack of difficulties with acoustic window limitations (3)...
    • ...These limitations include (1) complex flow producing loss of signal because intravoxel dephasing may simulate disease; (2) vessels not truly perpendicular to the acquired section plane are more likely to show saturation effect, which causes low signal and simulates disease (Fig. 2); (3) triphasic 568 Cardiovascular Magnetic Resonance Imaging...
    • ... (1) the velocity-encoding factor needs to be actively chosen before the acquisition according to the expected velocity of the vessel to be imaged (which is typically 150–200 cm/second in the aorta), with larger velocity-encoding values increasing noise, and smaller velocity-encoding values causing aliasing artifacts; (2) the imaging plane needs to be perpendicular to the vessel of interest for more accurate flow measurement; and (3) low ...

    Servet Tatli. Magnetic Resonance Angiography of the Aorta and Peripheral Arteries

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