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- Title
Morphologic Evaluation of Ductus Diverticulum Using Multi - Detector Computed Tomography: Comparison with Traumatic Pseudoaneurysm of the Aortic Isthmus.
- Authors
Jun Hyung Ann; Eun Young Kim; Yu Mi Jeong; Jeong Ho Kim; Hyung Sik Kim; Hye-Young Choi
- Abstract
Objectives: To evaluate morphologic variations at the aortic isthmus with particular attention to ductus diverticulum, a mimicker of traumatic pseudoaneurysm, and to describe differences using Computed Tomography (CT) images. Patients and Methods: From December 2013 to December 2014, patients who underwent a chest CT examination after blunt trauma at our emergency department were included. Aortic isthmus morphologies were evaluated using multiplanar reconstruction (MPR) and maximum intensity projection (MIP) images as follows. Type I -concave contour, type II -convexity without a discrete bulge, or type III -a discrete focal bulge (defined as ductus diverticulum). Results: After excluding 11 cases of traumatic pseudoaneurysm of the aortic isthmus, a total of 432 trauma patients (mean age = 47.1 ± 19.1 years, number of males = 318) were evaluated for aortic isthmus morphology, and classified as follows; type I (n = 240, 55.6%), type II (n = 157, 36.3%), and type III (n = 35, 8.1%). As compared with traumatic pseudoaneurysm (n = 11), ductus diverticulum had a smaller vertical diameter (5.5± 1.3mmvs. 11.2 ± 2.7 mm, P < 0.001), a broader base (14.9 ± 4.1mmvs. 8.8 ±4.5 mm, P < 0.001), a smoother margin (97.1% vs. 27.3%, P < 0.001), and formed obtuse angle with the aortic wall. Furthermore, ductus diverticulum was not associated with the presence of a dissection flap or hemomediastinum. Conclusion: Ductus diverticulum, a mimicker of traumatic pseudoaneurysm of the aortic isthmus, is a frequently observed anatomic variant during CT examinations. Familiarity with its CT imaging findings could avoid it being confused with traumatic pseudoaneurysm in blunt trauma patients.
- Subjects
ANGIOGRAPHY; AORTA radiography; BLOOD vessels; AORTA; CHEST X rays; DIGITAL image processing; DIVERTICULUM; FALSE aneurysms; MULTIDETECTOR computed tomography; ANATOMY
- Publication
Iranian Journal of Radiology, 2016, Vol 13, Issue 4, p1
- ISSN
1735-1065
- Publication type
Article
- DOI
10.5812/iranjradiol.38016