Online Spatiotemporally Constrained Reconstruction for Real-Time Interactive MRI.

Authors

Duc H Le, Prakash Kumar, Ecrin Yagiz, Ye Tian, Krishna S Nayak

Published in

Magnetic resonance in medicine. Oct 18, 2025. Epub Oct 18, 2025.

Abstract

To develop a low-latency dynamic MRI reconstruction that provides better spatial and temporal fidelity than contemporary online reconstruction, for localization.
We utilize online spatiotemporally constrained reconstruction (STCR) using a computationally efficient augmented Lagrangian solution and a limited number of iterations that terminate before the acquisition of the next frame. Online STCR is evaluated in the setting of fetal cardiac localization at 0.55 T, and is compared with online view-sharing and offline compressed sensing, using edge sharpness metrics.
Online STCR has the highest structural similarity index measure (SSIM) to offline STCR among the compared online reconstruction methods. Spatial edge sharpness improved by 13% $\pm$ 2% and temporal edge sharpness improved by 34% $\pm$ 4% compared to view-sharing.
We demonstrate low-latency reconstruction for 2D real-time MRI at 1.5 $\times$ 1.5 mm ${}^2$ spatial resolution, 31.8 ms temporal resolution, and 240 $\times$ 240 mm ${}^2$ FOV. We demonstrate that online STCR improves the depiction of rapidly moving boundaries, compared to standard view-sharing.

PMID:
41108664
Bibliographic data and abstract were imported from PubMed on 19 Oct 2025.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.