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Simultaneous high-resolution cardiac T(1) mapping and cine imaging using model-based iterative image reconstruction

Item Type:Article
Title:Simultaneous high-resolution cardiac T(1) mapping and cine imaging using model-based iterative image reconstruction
Creators Name:Becker, K.M., Schulz-Menger, J., Schaeffter, T. and Kolbitsch, C.
Abstract:PURPOSE: To provide high-resolution cardiac T(1) mapping of various cardiac phases and cine imaging within a single breath-hold using continuous golden ratio-based radial acquisition and model-based iterative image reconstruction. METHODS: Data acquisition was performed continuously using golden ratio-based radial sampling and multiple inversion pulses were applied independent of the heart rate. Native T(1) maps of diastole and systole were reconstructed with in-plane resolution of 1.3 × 1.3 mm(2) using model-based iterative image reconstruction. Cine images with 30 cardiac phases were reconstructed from the same data using kt-SENSE. The method was evaluated in a commercially available T(1) phantom and 10 healthy subjects. In vivo T(1) assessment was carried out segment-wise. RESULTS: Evaluation in the phantom demonstrated accurate T(1) times (R(2) > 0.99) and insensitivity to the heart rate. In vivo T(1) values did not differ between systole and diastole, and T(1) times assessed by the proposed approach were longer than measured with a modified Look-Locker inversion recovery (MOLLI) sequence, except for lateral segments. Cine images had a consistent dark-blood contrast and functional assessment was in agreement with assessment based on Cartesian cine scans (difference in ejection fraction: 0.26 ± 2.65%, P = 0.65). CONCLUSION: The proposed approach provides native T(1) maps of diastole and systole with high spatial resolution and cine images simultaneously within 16 s, which could strongly improve the scan efficiency.
Keywords:Cine Imaging, Model-Based Reconstruction, Multiparametric Acquisition, Myocardial Tissue Characterization, T(1) Mapping
Source:Magnetic Resonance in Medicine
Page Range:1080-1091
Date:February 2019
Official Publication:https://doi.org/10.1002/mrm.27474
PubMed:View item in PubMed

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