Demonstration of a high resolution x-ray detector for medical imaging
Demonstration of a high resolution x-ray detector for medical imaging
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用于医学成像的高分辨率 X 射线探测器演示
DOI：
10.1117/12.2320723
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Stankus, Brian
中科院分区：
文献类型：
--
作者：
Kingon, Angus I.;Morse, Theodore F.;Weber, Peter M.;Akif, Adil;Gupta, Rajiv;Murphy, Timothy P.;Cherepy, Nerine J.;Adams, Bernhard W.;Bifano, Thomas G.;Stankus, Brian
在数字X射线成像中，决定所有间接检测系统的图像分辨率的关键因素是X射线闪烁体中的光的扩散。目前部署的分辨率在75微米至300微米之间的临床X射线探测器受到这种光传播的影响。这项工作证明了显着提高的分辨率的间接X射线闪烁探测器使用新的结构化方法。新的结构化闪烁体由三个主要组成部分：高光学质量的“通道板”，反射材料内的毛细管的通道板，和聚合物为基础的增透材料，被纳入毛细管。用于各种光学应用的通道板由中空拉制的硼硅酸盐玻璃纤维束制成，重复的成束和拉制将芯和毛细孔的直径减小到低至5微米的值。然后将这些束切割成厚度约为1 mm的高质量板（“通道板”）。通道板包含几何有序的毛细管通道（每平方厘米约5百万个通道）。使用原子层沉积（ALD）用70 nm厚的Al 2 O3：W涂层涂覆通道壁以光学地限制通道内的光电发射。光学通道板渗透有在劳伦斯利弗莫尔国家实验室开发的新的铋基增透聚合物，对于20-30 keV的X射线能量，具有> 30，600光子/keV的光子产率，这是乳房X射线照相术感兴趣的范围。新的闪烁体板用于实验证明10微米（或50线对/ mm）的X射线分辨率，比现有的闪烁探测器提高了约7倍。与数字检测系统耦合的结构化闪烁体板可以用于提高诸如乳房X线摄影、放射照相术和计算机断层摄影的应用中的空间分辨率。
In digital X-ray imaging, a crucial factor determining image resolution of all indirect detection systems is the spread of light in the X-ray scintillator. Currently deployed clinical x-ray detectors, with a resolution between 75 and 300 microns, are affected by such spread of light. This work demonstrates the significantly improved the resolution of an indirect X-ray scintillation detector using a new structuring approach The new structured scintillator consists of three main components: a high optical quality ‘channel plate’, a reflective material within the capillaries of the channel plate, and a polymer-based scintillating material that is incorporated in the capillaries. Channel plates, which are utilized for a variety of optical applications, are produced from bundles of hollow drawn borosilicate glass fibers, with repeated bundling and drawing reducing the diameter of the core and capillary pores down to values as low as 5 microns. These bundles are then cut to make high quality plates (‘channel plates’) with a thickness around 1 mm. Channel plates contain geometrically ordered capillary channels (about 5 million channels per square cm). The channel walls were coated with a 70 nm thick coating of Al2O3:W using atomic layer deposition (ALD) to optically confine the photoemission within the channel. The optical channel plates were infiltrated with a new bismuth-based scintillating polymer developed at Lawrence Livermore National Laboratory, with a photon yield of > 30,600 photons/keV for X-ray energies of 20-30 keV, a range of interest for mammography. The new scintillator plate was used to experimentally demonstrate an X-ray resolution of 10 microns (or 50 linepairs/ mm), an approximately 7 times improvement over existing scintillating detectors. A structured scintillator plate, coupled with a digital detection system may be used to improve the spatial resolution in applications such as mammography, radiography, and computed tomography.
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影响因子：
35
作者：
Yakunin S;Sytnyk M;Kriegner D;Shrestha S;Richter M;Matt GJ;Azimi H;Brabec CJ;Stangl J;Kovalenko MV;Heiss W
通讯作者：
Heiss W
用于伽马能谱和中子主动询问的载铋塑料闪烁体
DOI：
--
发表时间：
2012
期刊：
Nuclear Science Symposium and Medical Imaging Conference
影响因子：
--
作者：
N. Cherepy;R. Sanner;T. Tillotson;S. Payne;P. Beck;S. Hunter;L. Ahle;P. Thelin
通讯作者：
P. Thelin
用于伽马射线光谱的载铋塑料闪烁体
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
B. L. Rupert;N. Cherepy;B. Sturm;R. Sanner;S. Payne
通讯作者：
S. Payne
从边缘图像确定数字成像探测器的调制传递函数的简单方法
DOI：
--
发表时间：
2003
期刊：
SPIE Medical Imaging
影响因子：
--
作者：
E. Buhr;S. Günther;U. Neitzel
通讯作者：
U. Neitzel