| 基于振动模型的呼吸运动估计与伪影反卷积校正 |
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| 引用本文： | 许全盛,袁克虹,于丽娟,王文志,叶大田. 基于振动模型的呼吸运动估计与伪影反卷积校正[J]. 南京航空航天大学学报(英文版), 2010, 27(1): 88-96 |
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| 作者姓名： | 许全盛 袁克虹 于丽娟 王文志 叶大田 |
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| 作者单位： | 1. 清华大学医学院,北京,100084;中国清华大学生物医学研究中心,深圳,518055,中国
2. 哈尔滨医科大学附属肿瘤医院PET/CT中心,哈尔滨,150081,中国 |
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| 基金项目： | Supported by the Science and Technology Foundation of Guangdong Province(2008B030303055)~~ |
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| 摘 要： | PET／CT图像的呼吸运动伪影严重影响胸腹部肿瘤的诊断与治疗计划的制定。现有的伪影校正方法大都涉及呼吸门控设备和四维CT的使用，不仅给测试带来不便，还让患者遭受大剂量的CT照射从而对其造成额外伤害。为此，采用正弦振动来模拟呼吸运动，通过对仿真和体模图像倒谱的Radon变换来估算呼吸运动的幅度和方向，然后分别采用维纳滤波、约束最小二乘法和Richardson—Lucy迭代算法，根据估计的运动参数对伪影图像进行反卷积并比较它们的去伪影结果。仿真与体模实验结果均显示出模拟呼吸运动参数估计和伪影校正的良好结果．且方法安全、简便而经济，有望用于常规采集的静态PET图像呼吸伪影校正。
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| 关 键 词： | CT PET 呼吸运动 运动伪影 反卷积 |
RESPIRATORY MOTION ESTIMATION USING VIBRATION MODEL AND REDUCING MOTION BLUR THROUGH DECONVOLUTION |
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| Xu Quansheng,,Yuan Kehong,Yu Lijuan,Wang Wenzhi,Ye Datian. RESPIRATORY MOTION ESTIMATION USING VIBRATION MODEL AND REDUCING MOTION BLUR THROUGH DECONVOLUTION[J]. Transactions of Nanjing University of Aeronautics & Astronautics, 2010, 27(1): 88-96 |
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| Authors: | Xu Quansheng Yuan Kehong Yu Lijuan Wang Wenzhi Ye Datian |
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| Affiliation: | 1.School of Medicine/a>;Tsinghua University/a>;Beijing/a>;100084/a>;P.R.China/a>;2.Biomedical Engineering Research Center/a>;Shenzhen/a>;518055/a>;3.PET/CT Center of Affiliated Tumor Hospital/a>;Harbin Medical University/a>;Harbin/a>;150081/a>;P.R.China |
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| Abstract: | The respiratory motion leads to significant motion artifacts of the positron emission tomography (PET) image,thus influencing diagnoses and treatments in the radiation oncology.The existing approaches to correct motion artifacts involve using gating devices and/or four-dimensional (4-D) computed tomography (CT).However,they have the disadvantages of high CT dose and high computational burden.Hence,a sinusoid vibration model is presented to simulate the respiratory motion.The motion extent and the direction ... |
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| Keywords: | CT PET computed tomography (CT) positron emission tomography (PET) respiratory motion motion blur deconvolution |
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