Automatic region tracking for motion correction in MR perfusion imaging of the kidney
Denis de Senneville B, Desbarats P, Moonen C, Grenier N, Ries M
Laboratoire Imagerie Molculaire et fonctionnelle
Contrast-enhanced dynamic MRI acquisitions give access to renal physiological parameters like measurement of blood flow, blood volume and glomerular filtration. Since the rapid bolus passage hampers the use of gated sequences, rapid T1-weighted sequences have to be employed while free-breathing. As a result, the acquired data contain motion artefacts caused by the respiratory cycle, spontaneous movements and drifts which limit the quantitative analysis of the data. This study proposes a 2D region tracking method for retrospective motion correction without sacrificing temporal resolution which addresses the latter point by a preparative learning phase.