A Study of Radiation Dose and Image Quality after Implantation of Funnel Chest Orthopedic Plates into Body Molds with Energy-spectrum CT Versus Conventional CT
A Study of Radiation Dose and Image Quality after Implantation of Funnel Chest Orthopedic Plates into Body Molds with Energy-spectrum CT Versus Conventional CT
Objective To compare the radiation dose and image quality of body models scanned with funnel chest orthopedic plates in different modes.Methods The simulated body model after implantation of steel plates was scanned using Revolution CT in conventional scanning and spectral scanning modes using fixed mA mode and automatic mA mode,respectively,and the radiation dose after each scan was recorded for the comparative study,and the images of the group with the lowest radiation dose in conventional scanning and the group with a radiation dose lower than that in conventional scanning and closest to that in spectral scanning were selected for subjective and objective analyses;Results The lowest radiation dose was recorded in the 100Kvp+NI12 group,and the radiation dose in the 120Kvp+NI12 group was lower than and closest to the GSI.Objective evaluation and subjective scoring:the image quality of energy spectrum scanning(100keV+MARs,120keV+MARs,140keV+MARs)was better than that of conventional scanning.Conclusion The image quality in the energy spectrum scanning mode is higher than that of conventional scanning,and the balance between image and dose can be achieved by using 200 mA as the scanning condition in the GSI mode in daily work.
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