Efficient Radial Tagging: Undersampled Radial Acquisition with Polar Fourier Transform Reconstruction

In radial tagging, the information of taglines required for strain imaging is located on a donut shaped region in k-space that can be collected efficiently through radial sampling sequence. In this study, we investigated the efficiency of radial data acquisition for strain imaging in conjunction with an adapted PFT reconstruction algorithm; a Hankel-based transform used for polar data. Both phantom and human images showed high robustness of PFT reconstruction against reduced number of radial data lines. This can be exploited towards real-time imaging, which is necessary in some cardiac assessments such as stress test. In addition, its implementation is adequately fast for in-line reconstruction.

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