Image quality and radiation dose reduction in chest CT in pulmonary infection
| العنوان: | Image quality and radiation dose reduction in chest CT in pulmonary infection |
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| المؤلفون: | Federica Di Stefano, Vincenzo Schininà, Elisa Busi Rizzi, Elisa Pianura, Nicoletta Fusco, Ada Petrone, Pierluca Piselli, Massimo Cristofaro |
| المصدر: | La radiologia medica. 125:451-460 |
| بيانات النشر: | Springer Science and Business Media LLC, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Adult, Lung Diseases, Male, Image quality, Chest ct, Iterative reconstruction, Signal-To-Noise Ratio, Radiation Dosage, Reduction (complexity), Cohen's kappa, Image Processing, Computer-Assisted, Humans, Medicine, Radiology, Nuclear Medicine and imaging, Lung, Respiratory Tract Infections, Technology, Radiologic, Neuroradiology, Observer Variation, business.industry, Ultrasound, Radiation dose, General Medicine, Middle Aged, Radiation Exposure, Area Under Curve, Data Interpretation, Statistical, Radiographic Image Interpretation, Computer-Assisted, Female, Radiography, Thoracic, Tomography, X-Ray Computed, business, Nuclear medicine |
| الوصف: | To evaluate the effect of dose reduction with iterative reconstruction (IR) on image quality of chest CT scan comparing two protocols. Fifty-nine patients were enrolled. The two CT protocols were applied using Iterative Reconstruction (ASIR™) 40% but different noise indexes, recording dose-length product (DLP) and volume computed tomography dose index (CTDIvol). The subjective IQ was rated based on the distinction of anatomic details using a 4-point Likert scale based on the European Guidelines on Quality Criteria for CT. For each patient, two single CTs, at enrollment (group 1) and at follow-up after lowering the dose (group 2), were evaluated by two radiologists evaluating, for each examination, five different lung regions (central zone—CZ; peripheral zone—PZ; sub-pleural region—SPR; centrilobular region—CLR; and apical zone—AZ). An inter-observer agreement was expressed by weighted Cohen’s kappa statistics (k) and intra-individual differences of subjective image analysis through visual grading characteristic (VGC) analysis. An average 50.4% reduction in CTDIvol and 51.5% reduction in DLP delivered were observed using the dose-reduced protocol. An agreement between observers evaluating group 1 CTs was perfect (100%) and moderate to good in group 2 examinations (k-Cohen ranging from 0.56 for PZ and AZ to 0.70 for SPR). In the VGC analysis, image quality ratings were significantly better for group 1 than group 2 scans for all regions (AUCVGC ranging from 0.56 for CZ to 0.62). However, disagreement was limited to a score 4 (excellent)-to-score 3 (good) IQ transition; apart from a single case in PZ, both the observers scored the IQ at follow-up as 2 (sufficient) starting from a score 4 (excellent). Dose reduction achieved in the follow-up CT scans, although a lower IQ still allows a good diagnostic confidence. |
| تدمد: | 1826-6983 0033-8362 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39d88c9285e81a8db067af13698e934a https://doi.org/10.1007/s11547-020-01139-5 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....39d88c9285e81a8db067af13698e934a |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18266983 00338362 |
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