Abstract #3808

Ultrashort Echo Time (UTE) Imaging with a Time Frame Regularized Compressive Sensing (TF-CS)

Xun Jia¹, Yifei Lou², Jiang Du³

¹Radiation Medicine and Applied Sciences, University of California, San Diego, La Jolla, CA, United States; ²Mathematics, University of California, Irvine, Irvine, CA, United States; ³Radiology, University of California, San Diego, San Diego, CA, United States

Regular two-dimensional (2D) UTE imaging sequences employ half pulse excitations followed by radial ramp sampling. The 2D UTE sequence requires the tion of two acquisitions which adds a significant penalty to the total scan time. 3D UTE imaging employs a short rectangular pulse excitation followed by 3D radial ramp sampling, which is even more time consuming. Both 2D and 3D UTE sequences typically require undersampling to reduce scan time, but this produces streak artifacts. Recent advances in compressive sensing (CS) permits data recovery from extremely under-sampled measurements. In this study we aimed to reconstruct UTE image from the understampled data using a tight-frame (TF) regularized compressive sensing (TF-CS) technique.