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首页> 外文期刊>Radiography >10 kVp rule - An anthropomorphic pelvis phantom imaging study using a CR system: Impact on image quality and effective dose using AEC and manual mode
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10 kVp rule - An anthropomorphic pelvis phantom imaging study using a CR system: Impact on image quality and effective dose using AEC and manual mode

机译：10 kVP规则 - 使用CR系统的人为骨髓幻影成像研究：影响AEC和手动模式对图像质量和有效剂量的影响

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Purpose: This study aims to investigate the influence of tube potential (kVp) variation in relation to perceptual image quality and effective dose (E) for pelvis using automatic exposure control (AEC) and non-AEC in a Computed Radiography (CR) system. Methods and materials: To determine the effects of using AEC and non-AEC by applying the 10 kVp rule in two experiments using an anthropomorphic pelvis phantom. Images were acquired using 10 kVp increments (60-120 kVp) for both experiments. The first experiment, based on seven AEC combinations, produced 49 images. The mean mAs from each kVp increment were used as a baseline for the second experiment producing 35 images. A total of 84 images were produced and a panel of 5 experienced observers participated for the image scoring using the two alternative forced choice (2AFC) visual grading software. PCXMC software was used to estimate E. Results: A decrease in perceptual image quality as the kVp increases was observed both in non-AEC and AEC experiments, however no significant statistical differences (p > 0.05) were found. Image quality scores from all observers at 10 kVp increments for all mAs values using non-AEC mode demonstrates a better score up to 90 kVp. E results show a statistically significant decrease (p = 0.000) on the 75th quartile from 0.37 mSv at 60 kVp to 0.13 mSv at 120 kVp when applying the 10 kVp rule in non-AEC mode. Conclusion: Using the 10 kVp rule, no significant reduction in perceptual image quality is observed when increasing kVp whilst a marked and significant ￡ reduction is observed.
机译：目的：本研究旨在使用自动曝光控制（AEC）和在计算的射线照相（CR）系统中使用自动曝光控制（AEC）和非AEC来研究管势（KVP）变化与感知图像质量和有效剂量（e）的影响。方法和材料：通过在使用拟人骨盆幻影中应用10 kVP规则在两个实验中使用AEC和非AEC使用AEC和非AEC的效果。使用10 kVP增量（60-120 kVP）来获取图像的两种实验。基于七个AEC组合的第一个实验产生了49个图像。每个KVP增量的平均MAS被用作产生35个图像的第二实验的基线。共产生84个图像，并且使用两种替代强制选择（2AFC）视觉分级软件参与了5个经验丰富的观察员的面板。 PCXMC软件用于估计E.结果：在非AEC和AEC实验中观察到随着KVP增加的感知图像质量的降低，但没有发现显着的统计差异（P> 0.05）。使用非AEC模式的所有MAS值的所有观察者的图像质量评分为10 kVP增量，演示了90 kVp的更好分数。 E在在非AEC模式下应用10 kVP规则，在120 kVp下，在60kVP至0.13msV下，在75 kVp至0.13msv，在0.37msv，在非AEC模式下在120 kVp下，E在75 kVp至0.13msv的统计学上显着降低（p = 0.000）。结论：使用10 kVP规则，观察到kVP时，观察到kVp的增加，并且观察到显着和显着的£。

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