Gatti Marco, Marchisio Filippo, Fronda Marco, Rampado Osvaldo, Faletti Riccardo, Bergamasco Laura, Ropolo Roberto, Fonio Paolo
J Comput Assist Tomogr. 2018 Mar/Apr;42(2):191-196. doi: 10.1097/RCT.0000000000000677.
The aim of this study was to evaluate the impact on dose reduction and image quality of the new iterative reconstruction technique: adaptive statistical iterative reconstruction (ASIR-V).
Fifty consecutive oncologic patients acted as case controls undergoing during their follow-up a computed tomography scan both with ASIR and ASIR-V. Each study was analyzed in a double-blinded fashion by 2 radiologists. Both quantitative and qualitative analyses of image quality were conducted.
Computed tomography scanner radiation output was 38% (29%-45%) lower (P < 0.0001) for the ASIR-V examinations than for the ASIR ones. The quantitative image noise was significantly lower (P < 0.0001) for ASIR-V. Adaptive statistical iterative reconstruction-V had a higher performance for the subjective image noise (P = 0.01 for 5 mm and P = 0.009 for 1.25 mm), the other parameters (image sharpness, diagnostic acceptability, and overall image quality) being similar (P > 0.05).
Adaptive statistical iterative reconstruction-V is a new iterative reconstruction technique that has the potential to provide image quality equal to or greater than ASIR, with a dose reduction around 40%.
本研究旨在评估新型迭代重建技术——自适应统计迭代重建（ASIR-V）对剂量降低和图像质量的影响。
50例连续的肿瘤患者作为病例对照，在随访期间分别接受了采用ASIR和ASIR-V的计算机断层扫描。每项研究均由2名放射科医生采用双盲方式进行分析。对图像质量进行了定量和定性分析。
与ASIR检查相比，ASIR-V检查的计算机断层扫描仪辐射输出降低了38%（29%-45%）（P<0.0001）。ASIR-V的定量图像噪声显著更低（P<0.0001）。自适应统计迭代重建-V在主观图像噪声方面表现更佳（5mm时P=0.01，1.25mm时P=0.009），其他参数（图像清晰度、诊断可接受性和整体图像质量）相似（P>0.05）。
自适应统计迭代重建-V是一种新型迭代重建技术，有可能提供等同于或优于ASIR的图像质量，同时剂量降低约40%。
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