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Abstract #5211

Removing Artifact of 3D Spiral In-Out with Accelerated Iterative Reconstruction using k-space Preconditioning

zheng zhong1, Qi Liu1, and Jian Xu1
1United Imaging Healthcare North America, Houston, TX, United States

Synopsis

Keywords: Artifacts, Artifacts

Motivation: The 3D spiral in/out trajectory is valuable in numerous applications, including functional MRI, but is susceptible to artifacts when an inaccurate density compensation function (DCF) is employed.

Goal(s): Our objective is to eliminate these artifacts while reducing reconstruction time.

Approach: using iterative reconstruction with k-space pre-conditioner

Results: Image artifact was observed on 3D spiral-in/out trajectory when using inaccurate DCF. The artifact can be successfully removed using iterative reconstruction with significantly decreased iteration number (30 iteration to 10 iteration).

Impact: This advancement is expected to benefit various applications relying on the spiral in/out trajectory, such as real time imaging and functional MRI.

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Keywords