Slice reconstruction of 3D vessel based on object-oriented quantization

Aiming at the problem of inaccurate imaging model of three-dimensional (3D) reconstruction of rotational digital subtraction angiography (DSA), a nonlinear model based on object-oriented quantization was introduced, The model quantizes the projection pixel of 3D vessel slice as the number of vessels which the X-ray goes through. A slice reconstruction algorithm called segment self-guide reconstruction (SSGR) was developed. The SSGR is especially suitable for solving the problem of sparse projection and limited-views. The simulated results have proved the feasibility of the model and the validity of the algorithm.