Low latency vs. non linear phase: A balanced approach for UNFOLD filter design in quantitative Real-Time MRI
Moonen C, Maclair G, Ries M
IMF CNRS / University of Bordeaux 2
Real-time control of interventional procedures such as guidance of catheters or ablation therapy require a high temporal resolution, a low processing latency and methods that preserve the temporal characteristics of the data. Although UNFOLD encoded sequences are interesting candidates for these applications, current filter implementations show either a non-linear phase (IIRs) which alters the temporal characteristics or have insufficient latency (FIRs). This study proposes an IIR filter design which satisfies both constraints of low latency and linear phase.