Abstract #0702

Multiresolution imaging using golden angle stack-of-stars and compressed sensing

Abhishek Pandey^1,2, Umit Yoruk³, Puneet Sharma¹, Diego R. Martin¹, Maria Altbach¹, Ali Bilgin^1,2,4, and Manojkumar Saranathan^1,4

¹Department of Medical Imaging, University of Arizona, Tucson, AZ, United States, ²Electrical and Computer Engineering, University of Arizona, Tucson, AZ, United States, ³Electrical Engineering, Stanford University, Stanford, CA, United States, ⁴Biomedical Engineering, University of Arizona, Tucson, AZ, United States

Dynamic contrast enhanced MRI requires measurement of arterial input function with great accuracy while maintaining high spatial resolution. Golden angle stack-of-stars radial acquisition was used to get reconstructions at multiple temporal resolutions. A multiresolution reconstruction scheme is used to generate AIFs using a very small temporal window. The accuracy of the reconstruction method was checked on a realistic phantom and then applied to an in vivo data. Results show that compressed sensing reconstruction works best with high temporal resolution (HTR) AIF giving both diagnostic image quality and accurate GFR estimate.

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