Image quality with reduced radiation dose and contrast medium of cardiac computed tomography in infants with congenital heart disease using 70 KVP and DEEP-learning reconstruction with 256-detector CT.
Authors
Affiliations (4)
Affiliations (4)
- Graduate School of Health Sciences, Kumamoto University, 4-24-1 Kuhonji, Kumamoto, 862-0976, Japan.
- Department of Medical Technology, Tsuchiya General Hospital, 3-30 Nakajima-cho, Hiroshima, 730-8655, Japan.
- Department of Radiological Technology, Faculty of Health Science and Technology, Kawasaki University of Medical Welfare, 288 Matsushima, Okayama, 701-0193, Japan.
- Department of Medical Radiation Sciences, Faculty of Life Sciences, Kumamoto University, 4-24-1 Kuhonji, Kumamoto, 862-0976, Japan.
Abstract
This study compared radiation dose, vascular enhancement, and contrast-to-noise ratio (CNR) of 256-multidetector row computed tomography (MDCT) at 70 kVp with deep-learning reconstruction (DLR) to 64-MDCT at 80 kVp with ASiR of cardiac CT angiography (CCTA) in infants with congenital heart disease. The contrast medium (CM) was 266 mg/kg for the 256-MDCT group and 600 mg/kg for the 64-MDCT group. In the 256- and 64-MDCT groups, the median values were 0.45 and 0.75 mGy for adjusted volume CT dose index (P < .05) and 4.98 and 8.00 mGy-cm for dose length product (P < .05). Despite a 49% CM reduction in the 256-MDCT group, vascular enhancement and CNR showed no significant differences (P > .05). The 256-MDCT at 70 kVp with DLR can maintain vascular CT enhancement and CNR while reducing CM by 49% and radiation dose by 41% in infant CCTA, compared with 64-MDCT at 80 kVp with ASiR.