X-ray micro-CT with a displaced detector array
X-ray micro-CT with a displaced detector array
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DOI：
10.1118/1.1489043
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发表时间：
2002-07-01
期刊：
影响因子：
3.8
通讯作者：
Wang, G
中科院分区：
文献类型：
--
作者：
Wang, G
由于x射线微ct应用中样品的大小不同，因此希望有一种机制来改变微ct扫描仪的视野。将视场直径扩大一倍的一种众所周知的方法是将探测器阵列移动50%。在本文中，我们提出了探测器阵列位移大于0%但小于50%的连续可调视场，并制定了一种无伪影重建的加权方案。然后，我们用Shepp-Logan模型进行了数值模拟，以证明在扇形梁和锥形梁几何结构下的可行性。(C) 2002年美国医学物理学家协会。
Because the sizes of samples differ in x-ray micro-CT applications, it is desirable to have a mechanism to change the field of view of a micro-CT scanner. A well-known way to double the diameter of the field of view is to displace a detector array by 50%. In this paper, we propose to displace a detector array by an amount of greater than 0% but less than 50% for a continuously adjustable field of view, and formulate a weighting scheme for artifact-free reconstruction. Then, we perform numerical simulation with the Shepp-Logan phantom to demonstrate the feasibility in fan-beam and cone-beam geometry. (C) 2002 American Association of Physicists in Medicine.