A Low-Cost Fiducial Reference Phantom for Computed Tomography.

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2008-12-01 Print Date: 2008-11-01 DOI:10.6028/jres.113.027

Zachary H Levine, Steven Grantham, Daniel S Sawyer, Anthony P Reeves, David F Yankelevitz

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引用次数: 8

Abstract

To detect the growth in lesions, it is necessary to ensure that the apparent changes in size are above the noise floor of the system. By introducing a fiducial reference, it may be possible to detect smaller changes in lesion size more reliably. We suspend three precision spheres with a precision structure built from pieces from a popular children's building toy. We measure the distances between the centroids of the structures three ways; namely, with a high-precision mechanical method, micro computerized tomography, and medical computerized tomography. The three methods are in agreement, and also agree with the design values for the structure. It is also possible to pick a threshold so that the three spheres have their nominal volumes in the medical computerized tomography images. The use of volumetric measures allows the determination of lengths to much less than the voxel size using materials which have x-ray properties within the range of the human body. A suitable structure may be built with a very small parts cost.

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一种用于计算机断层扫描的低成本基准参考影。

为了检测病变的增长，有必要确保尺寸的明显变化高于系统的噪声底。通过引入基准参考，可以更可靠地检测病灶大小的较小变化。我们用一种流行的儿童建筑玩具的零件，用精确的结构悬挂三个精确的球体。我们用三种方法测量结构质心之间的距离;即采用高精度机械方法、显微计算机断层扫描和医学计算机断层扫描。这三种方法是一致的，也符合结构的设计值。也可以选择一个阈值，使三个球体在医学计算机断层扫描图像中具有其标称体积。体积测量的使用允许使用在人体范围内具有x射线特性的材料来确定远小于体素大小的长度。一个合适的结构可以用非常小的零件成本建造。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Research of the National Institute of Standards and Technology Engineering-General Engineering

自引率

33.30%

发文量

期刊介绍： The Journal of Research of the National Institute of Standards and Technology is the flagship publication of the National Institute of Standards and Technology. It has been published under various titles and forms since 1904, with its roots as Scientific Papers issued as the Bulletin of the Bureau of Standards. In 1928, the Scientific Papers were combined with Technologic Papers, which reported results of investigations of material and methods of testing. This new publication was titled the Bureau of Standards Journal of Research. The Journal of Research of NIST reports NIST research and development in metrology and related fields of physical science, engineering, applied mathematics, statistics, biotechnology, information technology.