Diffusion-weighted imaging (DWI) remains a valuable tool in abdominal lesion detection. However, respiratory and cardiac motion remain major effects confounding the robustness of abdominal DWI. Respiratory triggering and prospective gating techniques are typically employed to reduce the effect of respiratory motion on abdominal DWI. However, these techniques can become either inefficient or result in artifacts in patients with irregular breathing patterns. In addition, cardiac triggering further reduces the SNR efficiency of a respiratory triggered acquisition. The purpose of the present work is to develop an algorithm for combined retrospective gating of abdominal DWI based on recorded respiratory and cardiac signals.
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