A Study of Fixed Current and Automatic Tube Current Modulation at a Fixed Low Tube Voltage in Low-dose Computed Tomography (CT) Imaging of Infant Lungs

Background: With the development of computed tomography (CT) technology, number infants undergoing CT examination has increased. Recently, problems associated with radiation exposure have attracted public attention, and low-dose become research focus. Objectives: This study aimed to explore feasibility a fixed ultralow tube current combined iDose4 iterative reconstruction at low voltage (80 kV) in scanning infant lungs. Patients Methods: Ninety infants, aged 0 - 3 years, enhanced chest scan (including plain arterial scan), were included experimental group. In group, was performed 80 kV under (30 mA), phase carried out automatic modulation 150 mA). Meanwhile, 90 non-enhanced scan, randomly recruited as control For (30-150 each examination, technique used for reconstruction. The volume dose index (CTDIvol), dose-length product (DLP), effective (ED, measured using 32-cm diameter phantom), signal-to-noise ratio (SNR), overall subjective quality scans analyzed compared between groups. Results: Regarding different age groups, ED (mSv) significantly lower group (0-1-year-old subgroup: 0.48 ± 0.05 mSv vs. 0.91 0.19 P < 0.05; 1-2-year-old 0.50 0.01 0.75 0.10 2-3-year-old 0.46 0.79 0.11 0.05). image SNR higher (P 0.05), while difference not significant groups Conclusion: technique, obtained images met diagnostic criteria...