Abstract
The 3D reconstruction of coronary artery from X-ray angiograms rotationally acquired on C-arm has great clinical value. While cardiac-gated reconstruction has shown promising results, it suffers from the problem of residual motion. This work proposed a new local motion-compensated reconstruction method to handle this issue. An initial image was firstly reconstructed using a regularized iterative reconstruction method. Then a 3D/2D registration method was proposed to estimate the residual vessel motion. Finally, the residual motion was compensated in the final reconstruction using the extended iterative reconstruction method. Through quantitative evaluation, it was found that high-quality 3D reconstruction could be obtained and the result was comparable to state-of-the-art method.
Highlights
Coronary artery disease (CAD) is a common disease and main cause of death worldwide [1]
Due to its projection characteristic, X-ray coronary angiography suffers from some clinical limitations, such as vessel overlap, loss of 3D spatial information
To better assist percutaneous coronary intervention (PCI) procedures, many efforts have been devoted to perform 3D tomographic reconstruction of high-contrast coronary arteries using angiograms rotationally acquired on a C-arm
Summary
Coronary artery disease (CAD) is a common disease and main cause of death worldwide [1]. For 3D coronary artery reconstruction, the motion of coronary artery is firstly estimated by some kinds of registration and compensated in the reconstruction process using dynamic reconstruction methods [14, 15] In this way, all angiograms could be used to perform the reconstruction at each phase without introducing severe motion artifacts. Because of the irregular heart motion or other reasons, there still exists residual vessel motion among selected angiograms which degrades the quality of cardiac-gated reconstruction To handle this issue, strategies utilizing local motion compensation to improve the cardiac-gated reconstruction have been proposed. An initial cardiac-gated reconstruction is firstly performed and the vessel motion between the reconstructed image and angiograms is estimated and compensated in the final reconstruction [7, 21,22,23].
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