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Automatic selection of optimal systolic and diastolic reconstruction windows for dual-source CT coronary angiography

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Abstract

The aim of this study was to assess the performance of a motion-map algorithm that automatically determines optimal reconstruction windows for dual-source coronary CT angiography. In datasets from 50 consecutive patients, optimal systolic and diastolic reconstruction windows were determined using the motion-map algorithm. For manual determination of the optimal reconstruction window, datasets were reconstructed in 5% steps throughout the RR interval. Motion artifacts were rated for each major coronary vessel using a five-point scale. Mean motion scores using the motion-map algorithm were 2.4 ± 0.8 for systolic reconstructions and 1.9 ± 0.8 for diastolic reconstructions. Using the manual approach, overall motion scores were significantly better (1.9 ± 0.5 and 1.7 ± 0.6, p < 0.05), but diagnostic image quality was reached in >90% of cases using either approach. Using the automated approach, there was a negative correlation between heart rate and motion scores for systolic reconstructions (ρ = −0.26, p < 0.05) and a positive correlation for diastolic reconstructions (ρ = 0.46, p < 0.01). For the manual approach, no significant correlation was found for systolic reconstructions (ρ = −0.1, p = 0.52), while there was a positive correlation for diastolic reconstructions (ρ = 0.48, p < 0.01). Thus, the motion-map algorithm is a useful tool to save time in finding an appropriate reconstruction window in patients with heart rates <70 bpm (diastolic reconstruction) and >80 bpm (systolic reconstruction).

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Authors and Affiliations

  1. Department of Clinical Radiology, University of Muenster, Albert-Schweitzer-Strasse 33, 48149, Muenster, Germany

    H. Seifarth, M. Puesken, S. Wienbeck, D. Maintz, W. Heindel & K.-U. Juergens

  2. Department of Radiology, Asklepios Klinik Hamburg Altona, Paul Ehrlich Straße 1, 22763, Hamburg, Germany

    R. Fischbach

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  1. H. Seifarth
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  2. M. Puesken
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  3. S. Wienbeck
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  4. D. Maintz
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  5. R. Fischbach
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  6. W. Heindel
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  7. K.-U. Juergens
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Correspondence to H. Seifarth.

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Seifarth, H., Puesken, M., Wienbeck, S. et al. Automatic selection of optimal systolic and diastolic reconstruction windows for dual-source CT coronary angiography. Eur Radiol 19, 1645–1652 (2009). https://doi.org/10.1007/s00330-009-1329-2

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  • DOI: https://doi.org/10.1007/s00330-009-1329-2

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