Assessment of dose exposure and image quality in coronary angiography performed by 640-slice CT: a comparison between adaptive iterative and filtered back-projection algorithm by propensity analysis

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• 作者：Ernesto Di Cesare (1)
  Antonio Gennarelli (2)
  Alessandra Di Sibio (2)
  Valentina Felli (2)
  Alessandra Splendiani (2)
  Giovanni Luca Gravina (3)
  Antonio Barile (2)
  Carlo Masciocchi (2)
  
• 关键词：Coronary CT angiography ; Adaptive–iterative reconstruction ; Image noise ; Radiation dose ; Image quality
• 刊名：La radiologia medica
• 出版年：2014
• 出版时间：August 2014
• 年：2014
• 卷：119
• 期：8
• 页码：642-649
• 全文大小：315 KB
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• 作者单位：Ernesto Di Cesare (1)
  Antonio Gennarelli (2)
  Alessandra Di Sibio (2)
  Valentina Felli (2)
  Alessandra Splendiani (2)
  Giovanni Luca Gravina (3)
  Antonio Barile (2)
  Carlo Masciocchi (2)
  
  1. Division of Cardiac Radiology, Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio 1, 67100, L’Aquila, Italy
  2. Division of Radiology, Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
  3. Laboratory of Radiobiology, Division of Radiotherapy, Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, Via Vetoio 1, 67100, L’Aquila, Italy
  
• ISSN：1826-6983

文摘

Purpose This study was performed to confirm, by propensity score matching, whether the use of adaptive–iterative dose reduction (AIDR 3D) with a built-in automatic exposure control system provides clinical and dosimetric advantages with respect to the traditional filtered back-projection (FBP) algorithm without automatic exposure modulation. Materials and methods A total of 200 consecutive patients undergoing coronary computed tomography (CT) angiography on a 640-slice CT scanner were studied. A protocol with exposure parameters based on patient body mass index (BMI) and with images reconstructed using FBP (group A) was compared with a protocol with images acquired using tube current decided by an automatic exposure control system and reconstructed using AIDR (group B). Mean effective dose and image quality with both objective and subjective measurements were assessed. Results Mean effective dose was 23.6?% lower in group B than in group A (2.56 versus 3.34?mSv; p?p? Conclusions Comparative analysis by propensity score matching confirms that AIDR 3D with automatic exposure control is able to reduce significantly the mean radiation dose and improve the image quality compared with traditional FBP without exposure modulation.