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Influence of heart rate on diagnostic accuracy and image quality of 16-slice CT coronary angiography: comparison of multisegment and halfscan reconstruction approaches

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Abstract

The lower the heart rate the better image quality in multislice computed tomography (MSCT) coronary angiography. We prospectively assessed the influence of heart rate on per-patient diagnostic accuracy and image quality of MSCT coronary angiography and compared adaptive multisegment and standard halfscan reconstruction. A consecutive cohort of 126 patients scheduled to undergo conventional coronary angiography was examined with 16-slice CT. For all heart rate groups, per-patient diagnostic accuracy was significantly higher for multisegment than halfscan reconstruction with values of 95 vs. 79% (p < 0.05, <65 bpm, 38 patients), 85 vs. 66% (p < 0.05, 65–74 bpm, 47 patients), and 78% vs. 41% (p < 0.001, >74 bpm, 41 patients). Differences in diagnostic accuracy between adjacent heart rate groups were only significant for halfscan reconstruction for the comparison between the 65–74 and >74 bpm group (p < 0.05). The vessel lengths free of motion artifacts were significantly longer with multisegment reconstruction in all heart rate groups and for all coronary arteries (p < 0.005). For noninvasive MSCT coronary angiography, both per-patient diagnostic accuracy and image quality decline with increasing heart rate, and multisegment reconstruction at high heart rates yields similar results as standard halfscan reconstruction at low heart rates.

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Authors and Affiliations

  1. Department of Radiology, Charité - Universitätsmedizin Berlin, Humboldt-Universität zu Berlin, Charitéplatz 1, P.O. Box 10098, 10117, Berlin, Germany

    Marc Dewey, Florian Teige & Bernd Hamm

  2. Department of Cardiology, Charité, Berlin, Germany

    Michael Laule

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  1. Marc Dewey
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  2. Florian Teige
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  3. Michael Laule
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  4. Bernd Hamm
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Correspondence to Marc Dewey.

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Dewey, M., Teige, F., Laule, M. et al. Influence of heart rate on diagnostic accuracy and image quality of 16-slice CT coronary angiography: comparison of multisegment and halfscan reconstruction approaches. Eur Radiol 17, 2829–2837 (2007). https://doi.org/10.1007/s00330-007-0685-z

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  • DOI: https://doi.org/10.1007/s00330-007-0685-z

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