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at 12:36 a.m. Nov, 15, 2025
by
RadioBro
Author:
farojw
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Gated contrast-enhanced CT with a double-oblique short-axis reformation
demonstrates an ascending aortic diameter
of 4.7 cm (dilatation).
Diameter cutoffs (dilated):
ascending aorta > 4 cm
descending thoracic aorta > 3.5 cm
abdominal aorta > 3 cm
common iliac artery > 2.5 cm
popliteal artery ≥ 8 mm
"Aneurysmal dilatation is considered when the ascending aortic diameter reaches or exceeds 1.5 times the expected normal diameter (equal to or greater than 5 cm)."
https://radiopaedia.org/articles/ascending-aorta-dilatation?lang=us
Diameter cutoffs (dilated):
ascending aorta > 4 cm
descending thoracic aorta > 3.5 cm
abdominal aorta > 3 cm
common iliac artery > 2.5 cm
popliteal artery ≥ 8 mm
"Aneurysmal dilatation is considered when the ascending aortic diameter reaches or exceeds 1.5 times the expected normal diameter (equal to or greater than 5 cm)."
https://radiopaedia.org/articles/ascending-aorta-dilatation?lang=us
Personal Notes
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Missed Questions
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Core Radiology
Fundamentals of Diagnostic Radiology
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Crack the Core
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War Machine
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Sectional Anatomy
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Additional Resources
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One by one
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Section Title
Vascular Imaging: Thoracic Aorta