To inspect solid rocket motor's defects locally

local inspection scheme of solid rocket motor's defects was proposed for narrow fan-beam industrial computed tomography(ICT). Translation/rotation scan mode and rotation only scan mode were used to inspect solid rocket motor's defects locally. To demonstrate the effectiveness of local inspection scheme

narrow fan-beam ICT was used to inspect one solid rocket motor locally. Convolution backprojection algorithm and wavelet transform algorithm were applied to reconstruct ICT images locally. Results show that translation/rotation scan mode is effective for narrow fan-beam ICT to inspect solid rocket motor's defects locally

rotation only scan mode is not effective. For using projections outside the local defect area

the reconstructed image quality of convolution backprojection algorithm is better than that of wavelet transform algorithm. It is of great significance for improving the inspection efficiency of solid rocket motor's defects and for reducing the inspection cost.