Document Detail

Gated multidetector computed tomography. A technique to reduce intracranial aneurysm clip and coil artifacts.
MedLine Citation:
PMID:  20490439     Owner:  NLM     Status:  MEDLINE    
BACKGROUND AND PURPOSE: Streak artifacts caused by aneurysm clips and coils impede image quality in multidetector computed tomography (MDCT). The authors propose a technique to minimize these artifacts by gated data reconstruction and shifting the reconstruction window.
PATIENTS AND METHODS: Intracranial CT angiograms were acquired in the follow-up of six patients with clipped and coiled intracranial aneurysms, respectively. Images were reconstructed from four consecutive 45 degrees rotated segments with an acquisition time of 52.5 ms/segment. Data acquisition was gated via an external pacemaker cable-connected to the scanner.
RESULTS: Artifact orientation could be rotated by shifting the reconstruction window and interesting vessel segments visualized without disturbing streak artifacts. This allowed to assess the posterior communicating artery origin in two cases and a middle cerebral artery aneurysm remnant in another case, respectively. However, due to a higher noise interesting vessel segments were not adjustable in another three patients.
CONCLUSION: Gated MDCT is a promising technique to reduce the amount and to change the position of artifacts induced by clips or coils.
A Kovács; S Flacke; H Tschampa; D Hadizadeh; S Greschus; H Clusmann; R Kristof; H Urbach
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Publication Detail:
Type:  Journal Article     Date:  2010-05-21
Journal Detail:
Title:  Clinical neuroradiology     Volume:  20     ISSN:  1869-1447     ISO Abbreviation:  Clin Neuroradiol     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-06-24     Completed Date:  2010-10-12     Revised Date:  2012-10-17    
Medline Journal Info:
Nlm Unique ID:  101526693     Medline TA:  Clin Neuroradiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  99-107     Citation Subset:  IM    
Department of Radiology/Neuroradiology, University of Bonn Medical Center, Sigmund-Freud-Strasse 25, 53105 Bonn, Germany.
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MeSH Terms
Blood Vessel Prosthesis*
Cerebral Angiography / methods
Intracranial Aneurysm / radiography*,  surgery*
Middle Aged
Radiographic Image Enhancement / methods
Reproducibility of Results
Respiratory-Gated Imaging Techniques / methods*
Sensitivity and Specificity
Surgical Instruments*
Tomography, X-Ray Computed / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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