Non-Uniform Self-Gating in 2D Lung Imaging

Purpose: To adapt the non-uniform Self-Gating (nuSG) method and compare it to established self-gating approaches for lung imaging in uniform highly irregular respiratory patterns. Methods: Six healthy volunteers underwent free breathing MRI using a radial tiny golden angle ultrashort echo-time sequence. Acquisitions were performed with volunteer as uniformly possible deliberately pattern. The acquired data was reconstructed nuSG method, previously introduced cardiac of temporomandibular joint (TMJ) compared k-space based image-based approaches. Residual motion blur, SNR functional values assessed reference breath-hold acquisitions. Results: is capable reconstructing high-quality images patterns furthermore resolving cases where additional superimposed or no clear surrogate exists. Derived do not differ significantly from other gated reconstructions - case replicate BH values. Conclusion: Image are computationally more demanding but yield better results all aspects. In scenarios direct (i.e. lung-liver interface) extraction one-dimensional navigator sufficient. When there target structure available (e.g., considerable through-plane different source motion), two-dimensional correlation-based measure used able track accurately.