Carbon nanotube based microfocus field emission x-ray source for microcomputed tomography
Carbon nanotube based microfocus field emission x-ray source for microcomputed tomography
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DOI：
10.1063/1.2345829
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发表时间：
2006-09-04
影响因子：
4
通讯作者：
Zhou, Otto
中科院分区：
文献类型：
--
作者：
Liu, Zejian;Yang, Guang;Zhou, Otto
Microcomputed tomography is now widely used for in vivo small animal imaging for cancer studies. Achieving high imaging quality of live objects requires the x-ray source to have both high spatial and temporal resolutions. Preliminary studies have shown that carbon nanotube (CNT) based field emission x-ray source has significant intrinsic advantages over the conventional thermionic x-ray tube including better temporal resolution and programmability. Here we report the design and characterization of a CNT based field emission x-ray source that also affords a high spatial resolution. The device uses modified asymmetric Einzel lenses for electron focusing and an elliptical shaped CNT cathode patterned by photolithography. Stable and small isotropic x-ray focal spot sizes were obtained. (c) 2006 American Institute of Physics.
