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Abstract #5252

Determining the normal size of the pediatric abdominal aorta in MRI.

Corona Metz1, Anne Pohrt2, Katja Glutig1, Matthias Stephan Anders1, and Simon Veldhoen1
1Department of Pediatric Radiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin und Humboldt-Universität zu Berlin, Berlin, Germany, 2Institute of Biometry and Clinical Epidemiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin und Humboldt-Universität zu Berlin, Berlin, Germany

Synopsis

Keywords: Vascular/Vessel Wall, Blood vessels

Motivation: Reference values for the pediatric abdominal aorta based on MRI measurements remain unpublished.

Goal(s): Establishing reference values for the diameter of the pediatric abdominal aorta using MRI.

Approach: The abdominal aortic diameter of 151 cardiovascular-healthy children was measured at four levels by two radiologists using a stack-of-stars sequence after intravenous contrast. The obtained 3D-volume was used for the least squares regression model to relate aortic diameter to body surface area.

Results: The interrater reliability of the aortic diameter measurements was excellent. The Akaike information criterion identified the natural logarithmic polynomial regression as the optimal model for relating aortic diameter to body surface area.

Impact: Establishing reference values for the abdominal aorta in children is essential for the diagnosis and monitoring of cardiovascular disease.

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