Abstract #1151

Data acquisition strategies to mitigate cardiac-induced noise in quantitative R₂* maps of the brain

Quentin Raynaud¹, Thomas Dardano^1,2, Christopher Roy³, Jérôme Yerly^3,4, Tobias Kober^3,5,6, Ruud B. van Heeswijk³, and Antoine Lutti¹

¹Department for Clinical Neuroscience, Laboratory for Research in Neuroimaging, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland, ²Physics section, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland, ³Department of Diagnostic and Interventional Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland, ⁴Center for Biomedical Imaging (CIBM), Lausanne, Switzerland, ⁵Advanced Clinical Imaging Technology, Siemens Healthineers International AG, Lausanne, Switzerland, ⁶LTS5, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

Synopsis

Keywords: Artifacts, RelaxometryCardiac pulsation enhances the noise level in MR images of the brain and reduces the sensitivity of the data in studies of brain disease. We propose two data acquisition strategies that mitigate cardiac-induced noise in quantitative brain maps of the MRI parameter R₂*. The first strategy sets the number of samples at each k-space location according to the local level of cardiac-induced noise. The second strategy adjusts data acquisition in real-time to acquire the data most sensitive to cardiac-induced noise during the diastolic period of the cardiac cycle.

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Data acquisition strategies to mitigate cardiac-induced noise in quantitative R2* maps of the brain

Synopsis

Data acquisition strategies to mitigate cardiac-induced noise in quantitative R₂* maps of the brain