Evaluation of Radiation Dose in Computed Tomography Angiography before Transcatheter Aortic Valve Implantation

Authors

  • Napat Ritlumlert School of Radiological Technology, Faculty of Health Science Technology, HRH Princess Chulabhorn College of Medical Science, Laksi, Bangkok 10210, Thailand.
  • Numfon Tweeatsani School of Radiological Technology, Faculty of Health Science Technology, HRH Princess Chulabhorn College of Medical Science, Laksi, Bangkok 10210, Thailand.
  • Sutipong Jongjirasiri Diagnostic Imaging, Chulabhorn Hospital, Laksi, Bangkok 10210, Thailand. Department of Diagnostic and Therapeutic Radiology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Ratchathewi, Bangkok 10210, Thailand.
  • Thitiya Kittikhemakorn Diagnostic Imaging, Chulabhorn Hospital, Laksi, Bangkok 10210, Thailand.
  • Napatsorn Chaiwongkot School of Radiological Technology, Faculty of Health Science Technology, HRH Princess Chulabhorn College of Medical Science, Laksi, Bangkok 10210, Thailand.
  • Phornpailin Pairodsantikul School of Radiological Technology, Faculty of Health Science Technology, HRH Princess Chulabhorn College of Medical Science, Laksi, Bangkok 10210, Thailand.
  • Wongsakorn Luangphiphat Cardiology Center, Chulabhorn Hospital, Laksi, Bangkok 10210, Thailand.
  • Komen Sen-ngam Cardiology Center, Chulabhorn Hospital, Laksi, Bangkok 10210, Thailand.
  • Viroj Muangsillapasart Cardiology Center, Chulabhorn Hospital, Laksi, Bangkok 10210, Thailand.
  • Panatda Khitkhem Diagnostic Imaging, Chulabhorn Hospital, Laksi, Bangkok 10210, Thailand.
  • Nattawut Wijarn Diagnostic Imaging, Chulabhorn Hospital, Laksi, Bangkok 10210, Thailand.
  • Supannika Kawvised School of Radiological Technology, Faculty of Health Science Technology, HRH Princess Chulabhorn College of Medical Science, Laksi, Bangkok 10210, Thailand.

DOI:

https://doi.org/10.31584/jhsmr.2022910

Keywords:

transcatheter aortic valve implantation, computed tomography angiography, radiation dose, computed tomography

Abstract

Objective: To investigate the effective radiation dose and image quality of computed tomography angiography (CTA) before transcatheter aortic valve implantation (TAVI).
Material and Methods: This study involved 65 participants, diagnosed with aortic valve stenosis and examined with CTA before TAVI. The total mAs, kVp, volume CT dose index (CTDIvol), and dose–length product (DLP) in each scanning phase were recorded. The effective dose was calculated by multiplying the DLP by the conversion coefficient (k=0.015 mSv/[mGy.cm]). For quantitative image analysis, circular regions of interest were placed on six levels of the aorta in the axial images. The CT attenuation value, image noise, signal-to-noise ratio, and contrast-to-noise ratio were measured. For qualitative analysis, two radiologists rated the image quality of the aortic root and aortoiliac pathway.
Results: The mean CTDIvol and DLP were 23.59±5.19 mGy and 881.01±193.41 mGy.cm., respectively. The mean effective dose was 13.22±2.90 mSv; the whole-aorta CTA phase received the highest dose, followed by the coronary CTA and coronary artery calcium scoring phases (9.62±2.60, 2.44±1.13, and 1.16±0.55 mSv, respectively). Image quality ranged from good to excellent in all segments of the aorta.
Conclusion: The mean effective radiation dose of the pre-TAVI CT examination using 256-multidetector CT was 22.91± 5.03 mSv. The image quality in the aorta was good to excellent. The main factors that affected the radiation dose were: body mass index, total mAs, and kVp.

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Published

2023-04-21

How to Cite

1.
Ritlumlert N, Tweeatsani N, Jongjirasiri S, Kittikhemakorn T, Chaiwongkot N, Pairodsantikul P, Luangphiphat W, Sen-ngam K, Muangsillapasart V, Khitkhem P, Wijarn N, Kawvised S. Evaluation of Radiation Dose in Computed Tomography Angiography before Transcatheter Aortic Valve Implantation. J Health Sci Med Res [Internet]. 2023 Apr. 21 [cited 2024 Jul. 18];41(2):1-8. Available from: https://he01.tci-thaijo.org/index.php/jhsmr/article/view/263115

Issue

Vol. 41 No. 2 (2023): Mar-Apr

Section

Original Article

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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