Vascular phantom examination for trans-arterial CT angiography (CTA) to depict small arteries

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Author Info

Nobuyuki Takahashi MD Toshiyuki Irie

Corresponding Author

Toshiyuki Irie
Department of Radiology, Tsukuba University Hospital Mito Clinical Education and Training Center, Mito Kyodo General Hospital, Japan

A B S T R A C T

Purpose: Vascular phantom study to examine the potential of trans-arterial CT angiography (TACTA) using a 64 multi-detector rows CT (64-MDCT) for depiction of small arteries. Material and Methods: Non-diluted contrast medium (Iopamidol 300, contains 300 mgI/mL), 2 folds diluted contrast medium (CM), 4 folds, 8, 16, 32, 64 were filled in each small tube 0.1 mm, 0.2 mm, 0.5 mm in inner diameter. These tubes were placed in a cubic cup filled with 64 folds diluted CM. Axial CT image 0.5 mm in thickness was obtained using a 64-MDCT and observed with window width of 700. This window width was preferably and often used in our institution when we observed TACTA images. The visibility of each tube was judged by discussion and agreement between 2 interventional radiologists, and classified into 3 categories; visible, faintly visible, invisible. Results: 0.1 mm tube filled with non-diluted CM was faintly visible. 0.2 mm tube filled with 1-2 folds diluted CM was visible, and that filled with 4 folds diluted CM was faintly visible. 0.5 mm tubes filled with1-8 folds diluted CM were visible, and that filled with 16 folds diluted CM was faintly visible. The rests were invisible. Conclusion: TACTA using a 64-MDCT had a potential to depict small arteries 0.1 mm in diameter. Filling of denser CM in arteries enabled depiction of smaller arteries.

Article Info

Article Type

Technical Note

Publication history

Received: Mon 19, Mar 2018
Accepted: Wed 28, Mar 2018
Published: Mon 02, Apr 2018

Copyright

© 2023 Toshiyuki Irie. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Hosting by Science Repository.
DOI: 10.31487/j.RDI.2018.10.001