LamiGauss: Pitching Radiative Gaussian for Sparse-View X-ray Laminography Reconstruction
This addresses the problem of non-destructive inspection for plate-like structures in applications like microchips and composite battery materials, representing an incremental improvement with a novel method for a known bottleneck.
The paper tackles the challenge of reconstructing high-quality volumes from sparse-view X-ray laminography projections, proposing LamiGauss, which uses only 3% of full views to achieve superior performance over iterative methods optimized on full datasets.
X-ray Computed Laminography (CL) is essential for non-destructive inspection of plate-like structures in applications such as microchips and composite battery materials, where traditional computed tomography (CT) struggles due to geometric constraints. However, reconstructing high-quality volumes from laminographic projections remains challenging, particularly under highly sparse-view acquisition conditions. In this paper, we propose a reconstruction algorithm, namely LamiGauss, that combines Gaussian Splatting radiative rasterization with a dedicated detector-to-world transformation model incorporating the laminographic tilt angle. LamiGauss leverages an initialization strategy that explicitly filters out common laminographic artifacts from the preliminary reconstruction, preventing redundant Gaussians from being allocated to false structures and thereby concentrating model capacity on representing the genuine object. Our approach effectively optimizes directly from sparse projections, enabling accurate and efficient reconstruction with limited data. Extensive experiments on both synthetic and real datasets demonstrate the effectiveness and superiority of the proposed method over existing techniques. LamiGauss uses only 3$\%$ of full views to achieve superior performance over the iterative method optimized on a full dataset.