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Neuroradiology
Published in: Neuroradiology 1/2018

01-01-2018 | Spinal Neuroradiology

Ultra-high-resolution CT angiography of the artery of Adamkiewicz: a feasibility study

Authors: Kunihiro Yoshioka, Ryoichi Tanaka, Hidenobu Takagi, Yuta Ueyama, Kei Kikuchi, Takuya Chiba, Kazumasa Arakita, Joanne D. Schuijf, Yasuo Saito

Published in: Neuroradiology | Issue 1/2018

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Abstract

Purpose

Preoperative identification of the artery of Adamkiewicz can help prevent postoperative spinal cord injury following thoracic and thoracoabdominal aortic repair. Several studies have demonstrated the feasibility of evaluating the artery of Adamkiewicz using multi-detector row computed tomography (CT), but precise visualization remains a challenge. The present study was conducted to evaluate the usefulness of ultra-high-resolution CT for visualizing the artery of Adamkiewicz with a slice thickness of 0.25 versus 0.5 mm in patients with aortic aneurysms.

Methods

Our institutional review board approved this study. Twenty-four patients with thoracic and thoracoabdominal aneurysms were scanned with beam collimation of 0.25 mm × 128. Images were reconstructed with slice thicknesses of 0.25 and 0.5 mm. The signal-to-noise ratio (SNR) of the aorta and contrast-to-noise ratio (CNR) between the anterior spinal artery and spinal cord were measured. Two independent observers evaluated visualization of the artery of Adamkiewicz and its continuity between the anterior spinal artery and the aorta using a four-point scale.

Results

No significant differences in the SNR of the aorta or CNR of the anterior spinal artery were observed between 0.25- and 0.5-mm slices. The average visualization score was significantly higher for 0.25-mm slices (3.58 ± 0.78) than for 0.5-mm slices (3.13 ± 0.99) (p = 0.01). The percentage of patients with nondiagnostic image quality was significantly lower for 0.25-mm slices (8.3%) than for 0.5-mm slices (33.3%) (p = 0.03).

Conclusion

In patients with aortic aneurysms, ultra-high-resolution CT with 0.25-mm slices significantly improves visualization of the artery of Adamkiewicz compared to 0.5-mm slices.
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Metadata
Title
Ultra-high-resolution CT angiography of the artery of Adamkiewicz: a feasibility study
Authors
Kunihiro Yoshioka
Ryoichi Tanaka
Hidenobu Takagi
Yuta Ueyama
Kei Kikuchi
Takuya Chiba
Kazumasa Arakita
Joanne D. Schuijf
Yasuo Saito
Publication date
01-01-2018
Publisher
Springer Berlin Heidelberg
Published in
Neuroradiology / Issue 1/2018
Print ISSN: 0028-3940
Electronic ISSN: 1432-1920
DOI
https://doi.org/10.1007/s00234-017-1927-7

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