标题 |
Projection space denoising with bilateral filtering and CT noise modeling for dose reduction in CT
用于CT剂量降低的双边滤波投影空间去噪和CT噪声建模
相关领域
降噪
成像体模
噪音(视频)
人工智能
图像分辨率
像素
计算机视觉
图像质量
投影(关系代数)
双边滤波器
非本地手段
滤波器(信号处理)
图像噪声
迭代重建
计算机科学
数学
核医学
算法
医学
图像(数学)
图像去噪
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To investigate a novel locally adaptive projection space denoising algorithm for low-dose CT data. Methods: The denoising algorithm is based on bilateral filtering, which smooths values using a weighted average in a local neighborhood, with weights determined according to both spatial proximity and intensity similarity between the center pixel and the neighboring pixels. This filtering is locally adaptive and can preserve important edge information in the sinogram, thus maintaining high spatial resolution. A CT noise model that takes into account the bowtie filter and patient-specific automatic exposure control effects is also incorporated into the denoising process. The authors evaluated the noise-resolution |
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