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Insights Imaging. 2019 Jan 28;10(1):2. doi: 10.1186/s13244-019-0685-y.

Ultra-high-resolution subtraction CT angiography in the follow-up of treated intracranial aneurysms.

Author information

1
Department of Radiology and Nuclear Medicine, Radboud University Medical Center, Geert Grooteplein 10, P/O Box 9101, 6500 HB, Nijmegen, The Netherlands. Anton.Meijer@Radboudumc.nl.
2
Canon Medical Systems Europe B.V., Global Research & Development Center, Zoetermeer, The Netherlands.
3
Department of Neurosurgery, Radboud University Medical Center, Nijmegen, The Netherlands.
4
Department of Radiology and Nuclear Medicine, Radboud University Medical Center, Geert Grooteplein 10, P/O Box 9101, 6500 HB, Nijmegen, The Netherlands.

Abstract

In subtraction CT angiography (CTA), a non-contrast CT acquisition is subtracted from a contrast-enhanced CTA acquisition. Subtraction CTA can be applied in the detection, classification, and follow-up of intracranial aneurysms and is advantageous over conventional angiography because of its non-invasive nature, shorter examination time, and lower costs. Recently, an ultra-high-resolution CT scanner has been introduced in clinical practice offering an in-plane spatial resolution of up to 0.234 mm, approaching the resolution as seen during conventional invasive digital subtraction angiography (DSA). The twofold increase in spatial resolution as compared to a conventional CT scanner could improve the evaluation of small vascular structures and, coupled with dedicated post-processing techniques, further reduce metal artifacts. Technical considerations using a state-of-the-art high-resolution subtraction CTA protocol are discussed for application in the follow-up of surgical and endovascular treated intracranial aneurysms.

KEYWORDS:

Angiography; Brain; Cerebral aneurysm; Multi-detector row computed tomography

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