RADIATION DOSE REDUCTION AT LOW TUBE VOLTAGE WITH CORONARY ARTERY BYPASS GRAFT COMPUTED TOMOGRAPHY ANGIOGRAPHY BASED ON THE CONTRAST NOISE RATIO INDEX-Reference-Cited by-同舟云学术

RADIATION DOSE REDUCTION AT LOW TUBE VOLTAGE WITH CORONARY ARTERY BYPASS GRAFT COMPUTED TOMOGRAPHY ANGIOGRAPHY BASED ON THE CONTRAST NOISE RATIO INDEX

Published:2023-03-06 Issue:6 Volume:199 Page:527-532
ISSN:0144-8420
Container-title:Radiation Protection Dosimetry
language:en
Short-container-title:

Author:

Masuda Takanori¹²^ORCID,Nakaura Takeshi³⁴^ORCID,Funama Yoshinori⁵⁶,Sato Tomoyasu⁷^ORCID,Masuda Shouko⁸,Gotanda Rumi¹²,Arao Keiko¹²,Imaizumi Hiromasa¹²,Arao Shinichi¹²,Ono Atsushi¹²,Hiratsuka Junichi¹²,Awai Kazuo⁹¹⁰

Affiliation:

1. Department of Radiological Technology , Faculty of Health Science and Technology, , 288, Matsushima, Kurashiki, Okayama 701-0193 , Japan

2. Kawasaki University of Medical Welfare , Faculty of Health Science and Technology, , 288, Matsushima, Kurashiki, Okayama 701-0193 , Japan

3. Department of Diagnostic Radiology , Graduate School of Medical Sciences, , 1-1-1 Honjo, Kumamoto 860-8556 , Japan

4. Kumamoto University , Graduate School of Medical Sciences, , 1-1-1 Honjo, Kumamoto 860-8556 , Japan

5. Department of Medical Physics , Faculty of Life Sciences, , Kumamoto , Japan

6. Kumamoto University , Faculty of Life Sciences, , Kumamoto , Japan

7. Department of Diagnostic Radiology, Tsuchiya General Hospital , Nakajima-cho 3-30, Naka-ku, Hiroshima 730-8655 , Japan

8. Department of Radiological Technology, Kawamura clinic Otemachi , Naka-ku, Hiroshima 730-0051 , Japan

9. Department of Diagnostic Radiology , Graduate School of Biomedical Sciences, , Hiroshima , Japan

10. Hiroshima University , Graduate School of Biomedical Sciences, , Hiroshima , Japan

Abstract

Abstract To compare the radiation dose and diagnostic ability of the 100-kVp protocol, based on the contrast noise ratio (CNR) index, during coronary artery bypass graft (CABG) vessels with those of the 120-kVp protocol. For the 120-kVp scans (150 patients), the targeted image level was set at 25 Hounsfield units (HU) (CNR120 = iodine contrast/25 HU). For the 100-kVp scans (150 patients), the targeted noise level was set at 30 HU to obtain the same CNR as in the 120-kVp scans (i.e. using 1.2-fold higher iodine contrast, CNR100 = 1.2 × iodine contrast/(1.2 × 25 HU) = CNR120). We compared the CNRs, radiation doses, detection of CABG vessels and visualisation scores of the scans acquired at 120 and 100 kVp, respectively. At the same CNR, the 100-kVp protocol may help reduce the radiation dose by ⁓30% compared with the 120-kVp protocol, without degradation of diagnostic ability during CABG.

Publisher

Oxford University Press (OUP)

Subject

Public Health, Environmental and Occupational Health,Radiology, Nuclear Medicine and imaging,General Medicine,Radiation,Radiological and Ultrasound Technology

Link

https://academic.oup.com/rpd/article-pdf/199/6/527/50026892/ncad049.pdf

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