A CT Number Conversion Method of Cone Beam CT
-
摘要: CT值是医学CT重建图像的一个必备要素,在某些场合下已成为医生诊断疾病的辅助工具,比如骨密度测量、图像分割与识别等。本文介绍一种锥束CT的CT值转换方法。借助Sedentex CT模体,分别获得5种材料的标称CT值和锥束CT衰减系数重建值,并经线性拟合,建立起标称CT值和衰减系数重建值之间的转换方程。最后,分析对比度噪声比和图像灰度值均匀性偏差在CT值转换后的变化情况。Abstract: As a necessary composition of medical CT image, in some cases, CT number has been an aid when doctors diagnose diseases, such as measurement of bone density, image segmentation and recognition. This paper described a CT number conversion method of cone beam CT. On the base of Sedentex CT phantom, standard CT numbers and reconstructed attenuation coefficients of five analyzed materials were obtained respectively. The conversion equation between CT number and reconstructed attenuation coefficient was established by linear fitting. After CT number transformation, the numerical changes of contrast to noise ratio and uniform deviation were analyzed in the end.
-
Keywords:
- CT number /
- attenuation coefficient /
- contrast to noise ratio /
- uniform deviation
-
-
期刊类型引用(3)
1. 罗昊，李秀，邓飞，曹正锋，王耀，禄盛，罗久飞. 运营隧道仰拱质量无损检测震源研究. 工程地球物理学报. 2025(01): 56-64 . 
百度学术
2. 吴志勇，钱荣毅，马振宁，张俊，刘旭. 地震探测无人机遥控震源实验研究. 科学技术与工程. 2022(29): 12739-12745 . 百度学术
3. 黄真萍，张思怡，曹洋兵，邱冬冬，张向向. 锤击震源参数对浅层地震波的影响规律研究. 防灾科技学院学报. 2020(04): 1-8 . 百度学术
其他类型引用(3)
计量
- 文章访问数: 1004
- HTML全文浏览量: 28
- PDF下载量: 22
- 被引次数: 6
下载:
