1Radiological Sciences Laboratory, Stanford University, Stanford, CA, United States, 2Cardiovascular Imaging Section, Department of Radiology, Stanford University, Stanford, CA, United States
imaging under free breathing is a desirable tool for clinical routine, which
can provide improved patient comfort and shorter examination times.
Furthermore, it can be used in the context of MR-guided PET motion correction
in simultaneous PET-MRI. Here, we propose a radial acquisition and
reconstruction framework for the acquisition of these images. A piecewise rigid
respiration motion model enables a highly efficient use of the acquired data to
either achieve higher image quality or shorter examination times than standard, dual-gated techniques.