Abstract #2726

A Point Spread Function Based Measure of Artefact in Parallel MRI Reconstruction

Linghe Yang¹, Phil Robson², Charles McKenzie¹

¹Medical Biophysics, University of Western Ontario, London, Ontario, Canada; ²Department of Radiology, Beth Israel Deaconess Medical Center, Boston, MA, USA

This paper illustrates the use of Point Spread Function (PSF) to assess the image reconstruction quality of Parallel MRI, specifically GRAPPA. Image quality in parallel imaging is most often quantified by the SNR and the noise amplification g-factor. However, this neglects residual artefact in the reconstruction, which also has an important impact on image quality. Artefact in the final image after parallel imaging reconstruction may be quantified by calculating a PSF. We demonstrate a metric of the PSF that includes the spin density of the imaged object to better quantify the residual artefact in a parallel imaging reconstruction.