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Abstract #3966

Quantification of 3D Radial Undersampling Artifact to Obtain High Quality Isotropic Resolution (0.36 Mm) for Volumetric Cartilage Assessment

Jessica L. Klaers1, Ethan K. Brodsky1,2, Walter F. Block1,3

1Medical Physics, University of Wisconsin - Madison, Madison, WI, USA; 2Radiology, University of Wisconsin - Madison, Madison, WI, USA; 3Biomedical Engineering, University of Wisconsin - Madison, Madison, WI, USA

It has been suggested that precise cartilage volume measurements used in longitudinal studies of cartilage degeneration and treatment measurements require an in-plane resolution on the order of 0.3mm. While 3D radial SSFP methods have proven to be powerful for cartilage assessment by consistently providing 0.47mm isotropic resolution in 5 minutes, the effects of further increasing the resolution by increasing undersampling are poorly understood. We examine the impact of varying the undersampling factor for a given resolution and scan time to obtain high isotropic resolution for cartilage volume measurements. Preliminary results utilizing new scanner technology demonstrate higher image quality than previously attainable at high resolution.