Pediatric chest HRCT using the iDose4 Hybrid Iterative Reconstruction Algorithm: Which iDose level to choose?

[摘要] Purpose of the study is to determine the appropriate iterative reconstruction (IR) algorithm level that combines image quality and diagnostic confidence, for pediatric patients undergoing high-resolution computed tomography (HRCT). During the last 2 years, a total number of 20 children up to 10 years old with a clinical presentation of chronic bronchitis underwent HRCT in our department's 64-detector row CT scanner using the iDose IR algorithm, with almost similar image settings (80kVp, 40-50 mAs). CT images were reconstructed with all iDose levels (level 1 to 7) as well as with filtered-back projection (FBP) algorithm. Subjective image quality was evaluated by 2 experienced radiologists in terms of image noise, sharpness, contrast and diagnostic acceptability using a 5-point scale (1=excellent image, 5=non-acceptable image). Artifacts existance was also pointed out. All mean scores from both radiologists corresponded to satisfactory image quality (score ≤3), even with the FBP algorithm use. Almost excellent (score

[发布机构] 2nd Department of Radiology, Medical School, National and Kapodistrian University of Athens, Rimini 1, Athens; 12462, Greece^1;Department of Pediatrics, University General Hospital ATTIKON, Chaidari, Athens, Greece^2

[效力级别] 医药卫生 [学科分类] 卫生学

[关键词] Chronic bronchitis;Clinical presentations;Filtered back projection;High-resolution computed tomography;Iterative reconstruction algorithms;Pediatric patients;Similar image;Subjective image quality