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    Optimal scanning protocols of 64-slice CT angiography in coronary artery stents: An in vitro phantom study

    132248_Z%20Sun%20Manuscript%20R1%20phantom%20study.pdf (75.38Kb)
    Access Status
    Open access
    Authors
    Almutairi, A.
    Sun, Zhonghua
    Ng, Curtise
    Al-Safranb, Z.
    Al-Mullab, A.
    Al-Jamaanb, A.
    Date
    2009
    Type
    Journal Article
    
    Metadata
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    Citation
    Almutairi, Marzouq Abdulrahman and Sun, Zhonghua and Ng, Curtise and Al-Safran, Zakariya A. and Al-Mulla, Abeer A. and Al-Jamaan, Abdulaziz I . 2009. Optimal scanning protocols of 64-slice CT angiography in coronary artery stents: An in vitro phantom study. European Journal of Radiology. (In Press)
    Source Title
    European Journal of Radiology
    DOI
    10.1016/j.ejrad.2009.01.027
    ISSN
    0720-048X
    Faculty
    School of Science and Computing
    Faculty of Science and Engineering
    Department of Imaging and Applied Physics
    Remarks

    The link to the journal's home page is : http://www.sciencedirect.com/science/journal/0720048X

    URI
    http://hdl.handle.net/20.500.11937/15053
    Collection
    • Curtin Research Publications
    Abstract

    Purpose: The purpose of the studywas to investigate the optimal scanning protocol of 64-slice CT angiographyfor assessment of coronary artery stents based on a phantom study.Materials and methods: Coronary stents with a diameter of 2.5mm was implanted in thin plastic tubeswith an inner diameter of 3.0mm to simulate a coronary artery. The tubes were filled with iodinatedcontrast medium diluted to 178HU, closed at both ends and positioned in a plastic container filled withvegetable oil (-70 to -100 HU). A series of scans were performed with a 64-slice CT scanner with thefollowing protocols: section thickness: 0.67mm, 1.0mm, 1.5mm, 2.0mm, pitch value: 0.2, 0.3, 0.5 andreconstruction interval of 50% overlap of the section thickness. 2D axial and multiplanar reformattedimageswere generated to assess the visibility of stent lumen, while virtual intravascular endoscopy (VIE)was reconstructed to evaluate the artery wall and stent surface.Results: Our results showed that a scanning protocol of 1.0mmslice thickness with a pitch of 0.3 producedacceptable images with best demonstration of the intrastent lumen and stent surface with minimal imagenoise or artifacts. In contrast, submillimeter scans with 0.67mm resulted in moderate artifacts whichaffected visualization of the coronary lumen, in addition to the increased noise. When the section thicknessincreased to 1.5mmand 2.0mm, visualization of the arterywall and stent surfacewas compromised,although the intrastent lumen was still visible.Conclusion: Our in vitro study suggested that a scanning protocol of 1.0mm section thickness with pitchof 0.3 is the optimal protocol for evaluation of coronary artery stents as it allows generation of acceptableimages with better visualization of stent lumen, stent surface and coronary artery wall.

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