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首页> 外文期刊>Acta Radiologica >Application of adaptive non-linear 2D and 3D postprocessing filters for reduced dose abdominal CT
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Application of adaptive non-linear 2D and 3D postprocessing filters for reduced dose abdominal CT

机译：自适应非线性2D和3D后处理滤波器在减量腹部CT中的应用

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Background: Abdominal computed tomography (CT) is a frequently performed imaging procedure, resulting in considerable radiation doses to the patient population. Postprocessing filters are one of several dose reduction measures that might help to reduce radiation doses without loss of image quality. Purpose: To assess and compare the effect of two- and three-dimensional (2D, 3D) non-linear adaptive filters on reduced dose abdominal CT images. Material and Methods: Two baseline abdominal CT image series with a volume computer tomography dose index (CTDI vol) of 12 mGy and 6 mGy were acquired for 12 patients. Reduced dose images were postprocessed with 2D and 3D filters. Six radiologists performed blinded randomized, side-by-side image quality assessments. Objective noise was measured. Data were analyzed using visual grading regression and mixed linear models. Results: All image quality criteria were rated as superior for 3D filtered images compared to reduced dose baseline and 2D filtered images (P 0.01). Standard dose images had better image quality than reduced dose 3D filtered images (P 0.01), but similar image noise. For patients with body mass index (BMI) 30 kg/m 2 however, 3D filtered images were rated significantly better than normal dose images for two image criteria (P 0.05), while no significant difference was found for the remaining three image criteria (P 0.05). There were no significant variations of objective noise between standard dose and 2D or 3D filtered images. Conclusion: The quality of 3D filtered reduced dose abdominal CT images is superior compared to reduced dose unfiltered and 2D filtered images. For patients with BMI 30 kg/m 2, 3D filtered images are comparable to standard dose images.
机译：背景：腹部计算机断层扫描（CT）是一种经常执行的成像程序，会对患者群体造成可观的辐射剂量。后处理滤镜是减少剂量的几种措施之一，可以帮助减少辐射剂量而不降低图像质量。目的：评估和比较二维和三维（2D，3D）非线性自适应滤波器对减少剂量的腹部CT图像的影响。材料和方法：12例患者获得了两个基线腹部CT图像系列，其体积计算机体层摄影剂量指数（CTDI vol）分别为12 mGy和6 mGy。减少剂量的图像用2D和3D滤镜进行后处理。六名放射科医生进行了盲目随机，并排图像质量评估。测量了客观噪声。使用视觉分级回归和混合线性模型分析数据。结果：与降低剂量基线和2D过滤图像相比，所有3D过滤图像的图像质量标准均被评为优越（P <0.01）。标准剂量图像具有比减少剂量的3D滤波图像更好的图像质量（P <0.01），但是图像噪声相似。但是，对于体重指数（BMI）<30 kg / m 2的患者，对于两个图像标准，经3D过滤的图像的评分明显优于正常剂量图像（P <0.05），而其余三个图像标准均未发现显着差异（P＞ 0.05）。在标准剂量和2D或3D滤波图像之间，客观噪声没有明显变化。结论：3D过滤的减剂量腹部CT图像的质量优于减少剂量的未过滤和2D过滤图像。对于BMI <30 kg / m 2的患者，3D滤波图像与标准剂量图像相当。

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