Erschienen in:
Open Access
01.12.2019 | Report
Ultra-high-resolution subtraction CT angiography in the follow-up of treated intracranial aneurysms
verfasst von:
Frederick J. A. Meijer, Joanne D. Schuijf, Joost de Vries, Hieronymus D. Boogaarts, Willem-Jan van der Woude, Mathias Prokop
Erschienen in:
Insights into Imaging
|
Ausgabe 1/2019
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.