Artikel
The role of dual-source CT-angiography for postoperative control of clipped intracerebral aneurysms
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Veröffentlicht: | 28. April 2011 |
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Gliederung
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Objective: Comparison of image quality in dual source CT-angiography (CTA) versus CT-angiography (CTA) in a 16-row-scanner with conventional angiography (DSA) in postoperative control after neurosurgical clipping.
Methods: 30 aneurysms from 25 patients were included after neurosurgical clipping: 18 aneurysms after dual source CTA and 12 aneurysms after evaluation by a 16-row-scanner. The images were processed using 3D volume rendering technique (VRT) and bone removal. The results were compared to DSA images as the gold standard for comparative judgement. All patients underwent a postoperative DSA control. The CTA images were evaluated with regard to clip artefacts, visibility of the parent vessels and a potential neck remnant of clipped aneurysm. Furthermore, intraoperative pictures were correlated with the CTA imaging results.
Results: There were significantly fewer artefacts surrounding the aneurysm clips in dual- source CTA when compared to a CTA in a 16-row-scanner. Furthermore, the dual source CTA images resembled the actual postoperative DSA images as well the intraoperative situation more reliable. In our series, DSA still offered the best imaging information and highest resolution on potential neck remnants.
Conclusions: DSA is still the gold standard in the evaluation of potential neck remnants of intracerebral aneurysms. However, dual source CTA could be an alternative in cases with known remnant necks since it might help to reduce the frequency of follow-up DSAs.