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Electrocardiography-triggered high-resolution CT for reducing cardiac motion artifact: evaluation of the extent of ground-glass attenuation in patients with idiopathic pulmonary fibrosis

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Abstract

Purpose

The aim of this study was to evaluate the decreasing of cardiac motion artifact and whether the extent of ground-glass attenuation of idiopathic pulmonary fibrosis (IPF) was accurately assessed by electrocardiography (ECG)-triggered high-resolution computed tomography (HRCT) by 0.5-s/rotation multidetector-row CT (MDCT).

Materials and methods

ECG-triggered HRCT were scanned at the end-diastolic phase by a MDCT scanner with the following scan parameters; axial four-slice mode, 0.5 mm collimation, 0.5-s/rotation, 120 kVp, 200 mA/rotation, high-frequency algorithm, and half reconstruction. In 42 patients with IPF, both conventional HRCT (ECG gating(−), full reconstruction) and ECG-triggered HRCT were performed at the same levels (10-mm intervals) with the above scan parameters. The correlation between percent diffusion of carbon monoxide of the lung (%DLCO) and the mean extent of ground-glass attenuation on both conventional HRCT and ECG-triggered HRCT was evaluated with the Spearman rank correlation coefficient test.

Results

The correlation between %DLCO and the mean extent of ground-glass attenuation on ECG-triggered HRCT (observer A: r = −0.790, P < 0.0001; observer B: r = −0.710, P < 0.0001) was superior to that on conventional HRCT (observer A: r = −0.395, P < 0.05; observer B: r = −0.577, P = 0.002) for both observers.

Conclusion

ECG-triggered HRCT by 0.5 s/rotation MDCT can reduce the cardiac motion artifact and is useful for evaluating the extent of ground-glass attenuation of IPF.

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Authors and Affiliations

  1. Division of Health Science, Osaka University Graduate School of Medicine, 1-7 Yamadaoka, Suita, 565-0871, Japan

    Motoko Nishiura & Takeshi Johkoh

  2. Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan

    Shuji Yamamoto

  3. Department of Radiology, Osaka University Graduate School of Medicine, Osaka, Japan

    Osamu Honda, Noriyuki Tomiyama & Hironobu Nakamura

  4. Department of Radiology, Kinki University School of Medicine, Osaka, Japan

    Takenori Kozuka & Takamichi Murakami

  5. Department of Diagnostic Radiology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan

    Mitsuhiro Koyama

  6. MI-CLINIC, Osaka, Japan

    Seiki Hamada

  7. Department of Diagnostic Radiology, Himedic Clinic West Medical Corporation, Osaka, Japan

    Takashi Matsumoto & Yoshifumi Narumi

Authors
  1. Motoko Nishiura
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  2. Takeshi Johkoh
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  3. Shuji Yamamoto
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  4. Osamu Honda
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  12. Hironobu Nakamura
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Corresponding author

Correspondence to Motoko Nishiura.

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Nishiura, M., Johkoh, T., Yamamoto, S. et al. Electrocardiography-triggered high-resolution CT for reducing cardiac motion artifact: evaluation of the extent of ground-glass attenuation in patients with idiopathic pulmonary fibrosis. Radiat Med 25, 523–528 (2007). https://doi.org/10.1007/s11604-007-0179-6

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  • DOI: https://doi.org/10.1007/s11604-007-0179-6

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