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Asian consortium on radiation dose of pediatric cardiac CT (ASCI-REDCARD)

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Abstract

Background

With incremental utilization of pediatric cardiac CT in congenital heart disease, it is imperative to define its current radiation dose levels in clinical practice in order to help imagers optimize CT protocols, particularly in Asia and other developing countries where CT physicists are not readily available.

Objective

To evaluate current radiation dose levels and influencing factors in cardiac CT in children with congenital heart disease in Asia by conducting a retrospective multi-center, multi-vendor study.

Materials and methods

We included 1,043 pediatric cardiac CT examinations performed in 8 centers between January 2014 and December 2014 to evaluate congenital heart disease. In five weight groups, we calculated radiation dose metrics including volume CT dose index, size-specific dose estimate, dose–length product and effective dose. Age at CT exam, gender, tube voltage, scan mode, CT indication and image reconstruction algorithm were analyzed to learn whether they influenced CT radiation dose.

Results

Volume CT dose index, size-specific dose estimate, dose–length product and effective dose of pediatric cardiac CT showed variations in the range of 4.3–23.8 mGy, 4.9–17.6 mGy, 55.8–501.3 mGy∙cm and 1.5–3.2 mSv, respectively, within five weight groups. Gender, tube voltage, scan mode and cardiac function assessment significantly influenced CT radiation dose.

Conclusion

This multi-center, multi-vendor study demonstrated variations in radiation dose metrics of pediatric cardiac CT reflecting current practice in Asia. Gender, tube voltage, scan mode and cardiac function assessment should be considered as essential radiation dose-influencing factors in developing optimal pediatric cardiac CT protocols.

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Acknowledgments

We thank Martin W. M. Law, PhD, Department of Radiology, Queen Mary Hospital, HKSAR, China, for his help with statistical analysis.

Author information

Authors and Affiliations

  1. Department of Radiology, Hong Kong Baptist Hospital, Hong Kong, SAR, China

    Peter K. T. Hui

  2. Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 138-736, South Korea

    Hyun Woo Goo

  3. Department of Radiology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China

    Jing Du

  4. Department of Radiology, Queen Mary Hospital, Hong Kong, SAR, China

    Janice J. K. Ip

  5. Department of Radiology, National Cerebral and Cardiovascular Center, Osaka, Japan

    Suzu Kanzaki

  6. Department of Radiology, Yonsei University, Shinchon Severance Hospital, Seoul, South Korea

    Young Jin Kim

  7. Department of Radiology, Songklanagarind Hospital, Prince of Songkla University, Hat Yai, Thailand

    Supika Kritsaneepaiboon

  8. Department of Cardiology, University of Indonesia, National Cardiovascular Center Harapan Kita, Jakarta, Indonesia

    Oktavia Lilyasari

  9. Department of Radiology, Ramathibodi Hospital, Mahidol University, Salaya, Thailand

    Suvipaporn Siripornpitak

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  1. Peter K. T. Hui
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Correspondence to Hyun Woo Goo.

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Hui, P.K.T., Goo, H.W., Du, J. et al. Asian consortium on radiation dose of pediatric cardiac CT (ASCI-REDCARD). Pediatr Radiol 47, 899–910 (2017). https://doi.org/10.1007/s00247-017-3847-4

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  • DOI: https://doi.org/10.1007/s00247-017-3847-4

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