1. Department of Diagnostic Radiology Jinling Hospital, Medical School of Nanjing University, General Hospital of Eastern Theater
Command, Nanjing Jiangsu 210002, China| 2. Southern Medical University, The First School of Clinical Medicine, Guangzhou Guangdong 510515, China
Abstract：Objective A retrospective analysis of CT abdominal scan images of three brands of A, B, and C from May 8, 2018 to October 31, 2019, was performed in the General Hospital of Eastern Theater Command, 100 cases each. Perform objective and subjective image quality assessments and record radiation dose parameters [CT Dose Index Volume (CTDIvol), Dose Length Product (DLP), Effective Dose (ED)]. Methods From May 8 2018 to October 31 2019, one hundred noncontrast abdominal CT images from brand A, B and C CT were collected. Radiation dose and image quality were evaluated. Results The CT values of pancreas in brand A CT was higher than brand B CT (P<0.05), kidney and abdominal aorta were lower than brand B CT (P<0.05). Compared with brand C CT, the CT values of the liver and erector spinae muscles were higher, the CT values of the kidney and the abdominal aorta were lower in brand A CT (P< 0.05).The noise of brand A CT was higher than that of brand B CT (P<0.05). The SNR of liver, spleen, pancreas, kidney, abdominal aorta and erector spinae muscles in brand A CT were higher than those of brand B and C CT (P<0.05). The two readers had good to excellent consistency for image quality evaluation and the subjective average score was more than 4 points. The radiation dose of brand A CT was higher than that of brand B and brand C CT (P<0.05). Conclusion Brand A CT noncontrast abdomi- nal examination image qulity is higher than B CT and C CT which can fully meet the clinical requirements, while higher radiation dose
indicates further improvement is needed in future.
Pandharipande PV,Reisner AT,Binder WD,et a1 .CT in the emergency department: a real-time study of changes in physician decision making[J].Radiology,2016,278(3):812-821.
