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Potential of dosage reduction of cone-beam CT dacryocystography in healthy volunteers by decreasing tube current

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Japanese Journal of Radiology Aims and scope Submit manuscript

Abstract

Purpose

Cone-beam CT dacryocystography (CBCT-DCG) is a newly developed lacrimal passage imaging technique. This pilot study aimed to determine the effect of reducing tube current on image quality and radiation dose of CBCT-DCG in healthy volunteers.

Materials and methods

Thirty volunteers were randomly divided into three groups of ten. Each group of subjects underwent CBCT-DCG using a tube current of 13 mA, 10 mA, and 7 mA respectively. The image quality of CBCT-DCG was assessed independently by two observers using three different scoring methods and compared among the groups. The effective dose was estimated and compared among the three different tube current groups.

Results

The CBCT-DCG images provided a high spatial and contrast resolution of the bony structures and the contrast medium. No significant differences were found in the image quality between different tube current groups. Compared with the 13 mA group (49.44 μSv), the effective dose for 10 mA group (38.40 μSv) and 7 mA group (27.12 μSv) decreased by 22.33% and 45.15%, respectively.

Conclusion

By decreasing the tube current, CBCT-DCG can be performed with a significant reduction of effective dose without loss of image quality in healthy volunteers.

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Abbreviations

CBCT:

Cone-beam computed tomography

DCG:

Dacryocystography

CBCT-DCG:

Cone-beam CT dacryocystography

CT-DCG:

Computed tomographic dacryocystography

DS-DCG:

Digital subtraction dacryocystography

DAP:

Dose area product

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Acknowledgments

We thank Mr. Jianli Chen and MS Gao Jing for their English translation assistance.

Funding

This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors. The authors received no financial support for the research, authorship, and/or publication of this article.

Author information

Author notes

  1. Zhaoyue Chen, Peng Wang, and Lei Du contributed equally to this work.

Authors and Affiliations

  1. Department of Otolaryngology, Xiamen Branch, Zhongshan Hospital, Fudan University, No. 668 JinHu Road, Xiamen, China

    Zhaoyue Chen & Peng Wang

  2. Xiamen Medical College, Xiamen, China

    Lei Du

  3. Xiamen Siming District Kaiyuan Street Community Health Service Center, Xiamen, China

    Lan Wang

Authors
  1. Zhaoyue Chen
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  2. Peng Wang
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  3. Lei Du
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  4. Lan Wang
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by ZC, PW and LD. The first draft of the manuscript was written by ZC and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Zhaoyue Chen.

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Conflict of interest

The authors declare that there are no conflicts of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration and its later amendments. The Ethics Committee of the Xiamen Branch, Zhongshan Hospital, Fudan University approved this study.

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Informed written consent was obtained from all subjects.

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Chen, Z., Wang, P., Du, L. et al. Potential of dosage reduction of cone-beam CT dacryocystography in healthy volunteers by decreasing tube current. Jpn J Radiol 39, 233–239 (2021). https://doi.org/10.1007/s11604-020-01058-5

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  • DOI: https://doi.org/10.1007/s11604-020-01058-5

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