Pediatric extracranial applications of MR angiography |
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Authors: | Kao S C Ehrhardt J C Sato Y D'Alessandro M P Smith W L |
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Affiliation: | Department of Radiology, University of Iowa Hospitals and Clinics, Iowa City 52242, USA. |
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Abstract: | Extracranial magnetic resonance angiography (MRA) was performed in 20 children to evaluate for various arterial and venous conditions. Time-of-flight and phase-contrast angiograms were constructed using a maximal-intensity-projection algorithm. The accuracy of MRA was comparable to Doppler ultrasound (n = 12) and conventional angiography (n = 3). MRA could provide an excellent mapping of patent (including collaterals) versus thrombosed vessels at sites not evaluated or inaccessible by sonography. Limitations included assessment of small and/or tortuous vessels, severely stenotic lesions, and very slow flow. |
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