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Evaluation of image quality on a per-patient, per-vessel, and per-segment basis by noninvasive coronary angiography with 64-section computed tomography: dual-source versus single-source computed tomography

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Abstract

Purpose

The purpose of this study was to evaluate the image quality (IQ) of dual-source CT (DSCT) versus single-source CT (SSCT).

Materials and methods

A total of 100 patients underwent 64-section CT coronary angiography (50 DSCT, 50 SSCT). Three observers evaluated the IQ of each coronary segment using a four-point scale (1, excellent; 2, good; 3, fair; 4, no assessment). The IQ of DSCT coronary angiography was compared with SSCT coronary angiography on a per-patient, per-vessel, and per-segment basis using the chi-squared test.

Results

The DSCT image quality score (IQS) was significantly lower on a per-patient basis and per-vessel basis for all vessels and on a per-segment basis for some segments (1, 2, 4PD, 4AV, 7, 9, 11, 12, 13) compared with SSCT. The DSCT IQS was significantly lower for certain segments (2, 4PD, 11, 13) with high heart rates (≥70 beats/min). The DSCT IQS was significantly lower for certain segments (1, 2, 3, 4PD, 4AV, 7, 8, 9, 10, 12, 13) with low heart rates (<70 beats/min).

Conclusion

DSCT showed a significantly better IQ than SSCT, especially in patients with low heart rates.

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Authors and Affiliations

  1. Department of Radiology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minamikogushi, Ube, 755-8505, Japan

    Yoshiteru Nakashima, Munemasa Okada, Yasuo Washida & Naofumi Matsunaga

  2. Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Japan

    Toshiro Miura, Tatsuo Fujimura & Tomoko Nao

Authors
  1. Yoshiteru Nakashima
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  2. Munemasa Okada
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  3. Yasuo Washida
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  4. Toshiro Miura
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  5. Tatsuo Fujimura
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  6. Tomoko Nao
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  7. Naofumi Matsunaga
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Correspondence to Yoshiteru Nakashima.

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Nakashima, Y., Okada, M., Washida, Y. et al. Evaluation of image quality on a per-patient, per-vessel, and per-segment basis by noninvasive coronary angiography with 64-section computed tomography: dual-source versus single-source computed tomography. Jpn J Radiol 29, 316–323 (2011). https://doi.org/10.1007/s11604-011-0560-3

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  • DOI: https://doi.org/10.1007/s11604-011-0560-3

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