Congenital Thoracic Vascular Anomalies: Evaluation with State-Of-The-Art MR Imaging and MDCT
Congenital Thoracic Vascular Anomalies: Evaluation with State-of-the-Art MR Imaging and MDCT Jeffrey C. Hellinger, MDa,*, Melissa Daubert, MDb, Edward Y. Lee, MD, MPHc,d, Monica Epelman, MDe KEYWORDS Aortic arch anomalies Pulmonary artery anomalies Thoracic systemic venous anomalies Pulmonary venous anomalies CT angiography MR imaging MR angiography Congenital thoracic vascular anomalies occur congenital thoracic vascular anomalies in pediatric in the thoracic aorta and branch arteries, pulmo- patients require fundamental understandings of nary arteries, thoracic systemic veins, and the imaging techniques, anatomic embryology and pulmonary veins (Table 1). Technological innova- characteristics, and underlying clinical pathophys- tions in magnetic resonance (MR) imaging and iology. Imagers should have knowledge of strate- multidetector-row computed tomography (MDCT) gies to optimize protocols to deliver accurate have greatly advanced the noninvasive diagnosis and safe cardiovascular imaging based on the of these anomalies in pediatric patients in recent suspected lesion(s) and the clinical stability of years. From the neonate to the adolescent, high- the patient. Equally important is the ability to resolution two-dimensional (2D) and three-dimen- adeptly use advanced postprocessing visualiza- sional (3D) MR imaging (MRI), noncontrast MR tion techniques for image display, interpretation, angiography (MRA), 3D contrast-enhanced MRA, and clinical management. This article assists the and 3D MDCT angiography (CTA) datasets provide reader in these objectives. Imaging strategies comprehensive multiprojectional, anatomic dis- and MR imaging-MR angiography/CTA tech- plays for interactive interpretation, treatment plan- niques are reviewed, followed by a discussion on ning, and postoperative and postendovascular the commonly encountered thoracic congenital evaluation. vascular anomalies, with emphasis on embry- Effective use and interpretation of MRI-MRA ology, clinical manifestations, and characteristic (Fig.
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