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Non-invasive coronary angiography with 16-slice spiral computed tomography: image quality in patients with high heart rates

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Abstract

The purpose of this study was to assess segment image quality at high heart rates using 16-slice computed tomography and differential reconstruction for major coronary vessels. According to the following protocol, 16-slice CT coronary angiography in 46 patients with a mean heart rate of 86.3±11.8 was reconstructed. At three transverse planes, preview series were obtained and motion artifacts evaluated in 5% increments from 0-95% within the cardiac cycle. Relying on image quality in the previews, reconstructions were performed at three z-positions for each patient. Segment image quality was assessed in terms of artifacts and visibility. The effects of heart rate and trigger delay on image quality were analyzed. Optimal image quality was achieved at 25 to 35% of the cardiac cycle for the left circumflex (CX) and right coronary artery (RCA) or 30 to 40% for the left main (LM) and left anterior descending artery (LAD). Sixteen-slice CT and differential reconstruction produced good image quality with a low percentage of motion-degraded proximal and middle segments (8.8%). Grades were 1.5 for the LM, 1.9 for the LAD, 2.0 for the CX and 2.3 for the RCA. At high heart rates, good image quality of the coronary arteries is achieved by 16-slice CT and a sophisticated reconstruction strategy at peak to late systole.

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Authors and Affiliations

  1. Department of Diagnostic Radiology, Eberhard Karl University, Hoppe-Seyler-Str. 3, 72076, Tübingen, Germany

    H. Brodoefel, A. Reimann, M. Heuschmid, A. Küttner, C. D. Claussen & A. F. Kopp

  2. Department of Cardiology, Eberhard Karl University, Otfried-Müller-Str. 10, 72076, Tübingen, Germany

    T. Beck, C. Burgstahler & S. Schroeder

Authors
  1. H. Brodoefel
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  2. A. Reimann
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  3. M. Heuschmid
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  4. A. Küttner
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  5. T. Beck
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  6. C. Burgstahler
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  7. C. D. Claussen
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  8. S. Schroeder
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  9. A. F. Kopp
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Correspondence to H. Brodoefel.

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Brodoefel, H., Reimann, A., Heuschmid, M. et al. Non-invasive coronary angiography with 16-slice spiral computed tomography: image quality in patients with high heart rates. Eur Radiol 16, 1434–1441 (2006). https://doi.org/10.1007/s00330-006-0155-z

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  • DOI: https://doi.org/10.1007/s00330-006-0155-z

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