Ultra-high temporal resolution 4D angiography using arterial spin labeling with subspace reconstruction.

ABSTRACT:

Purpose

To achieve ultra-high temporal resolution non-contrast 4D angiography with improved spatiotemporal fidelity.

Methods

Continuous data acquisition using 3D golden-angle sampling following an arterial spin labeling preparation allows for flexibly reconstructing 4D dynamic angiograms at arbitrary temporal resolutions. However, k-space data is often temporally "binned" before image reconstruction, negatively affecting spatiotemporal fidelity and limiting temporal resolution. In this work, a subspace was extracted by linearly compressing a dictionary constructed from simulated curves of an angiographic kinetic model. The subspace was used to represent and reconstruct the voxelwise signal timecourse at the same temporal resolution as the data acquisition without temporal bi

SUBMITTER: Shen Q 

PROVIDER: S-EPMC11893029 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature