  The increasingly demand for machining accuracy and product quality excites a
great interest in high-resolution non-destructive testing (NDT) methods, but
spatial resolution of conventional high-energy computed tomography (CT) is
limited to sub-millimeter because of large X-ray spot size. Therefore, we
propose a novel high-resolution high-energy CT based on laser-driven X-ray
source and prove its feasibility to allow high-spatial-resolution tomographic
imaging of dense objects. A numerical model is developed with a consideration
of realistic factors including parameter fluctuations, statistical noise and
detecting efficiency. By using modulation transfer functions, the system
performance is quantitatively characterized and optimized in terms of source
characteristics, detector aperture, geometrical configuration and projection
parameters. As a result, the simulated tomography for a high-density object (up
to 19.35g/cm3) achieves a basic spatial resolution of 64.9{\mu}m. This concept
expands the prospects of laser-based compact X-ray sources and shows a great
potential to achieve high-perspectivity micro-CT imaging for various industrial
applications.
