论文标题
基于全光逆池散射源的利益区域微焦点CT
Region-of-interest micro-focus CT based on an all-optical inverse Compton scattering source
论文作者
论文摘要
微焦点计算机断层扫描（CT），可以重建对象内的超精细结构，是许多领域中强大的非破坏性测试工具。当前用于微焦CT的X射线源通常受其相对较低的光子能量和低通量的限制。基于激光Wakefield加速器（LWFA）的全光逆综合散射源（AOC）可以在KEV-MEV范围内生成强烈的准单调X/Gamma-ray脉冲范围，其微小级别的源大小，并且在最近几年中，其潜在的应用在Micro-cocus CT上的应用非常有吸引力。在这里，我们通过对具有复杂内部结构的测试对象进行成像和重建测试对象，报告了使用AOC（〜70 KEV）对高保真微焦点CT进行的首次实验证明。采用了利益区域（ROI）方法来利用AOC的相对较小的视野（FOV）获得高分辨率重建。基于AOC的ROI微焦点CT的演示是其在超精美非破坏性测试领域应用的关键步骤。
Micro-focus computed tomography (CT), enabling the reconstruction of hyperfine structure within objects, is a powerful nondestructive testing tool in many fields. Current X-ray sources for micro-focus CT are typically limited by their relatively low photon energy and low flux. An all-optical inverse Compton scattering source (AOCS) based on laser wakefield accelerator (LWFA) can generate intense quasi-monoenergetic X/gamma-ray pulses in the keV-MeV range with micron-level source size, and its potential application for micro-focus CT has become very attractive in recent years due to the fast pace progress made in LWFA. Here we report the first experimental demonstration of high-fidelity micro-focus CT using AOCS (~70 keV) by imaging and reconstructing a test object with complex inner structures. A region-of-interest (ROI) CT method is adopted to utilize the relatively small field-of-view (FOV) of AOCS to obtain high-resolution reconstruction. This demonstration of the ROI micro-focus CT based on AOCS is a key step for its application in the field of hyperfine nondestructive testing.
