Abstract #0115
Metal Artifact Reduction Using a 3D UTE-MSI sequence with Time-Frame Regularized Compressed Sensing Reconstruction
Yifei Lou 1 , Qun He 2 , Xun Jia 3 , Eric Chang 2 , Christine B Chung 2 , and Jiang Du 2
1
Department of Mathematical Sciences,
University of Texas Dallas, Dallas, TX, United States,
2
Radiology,
University of California, San Diego, CA, United States,
3
Department
of Radiation Oncology, University of Texas Southwestern
Medical Center, Dallas, TX, United States
Metallic implants are routinely used to treat advanced
joint disease. There is a need for non-invasive
diagnosis of wear-induced disease. MRI has obvious
advantages. However, conventional MR sequences are
subject to severe distortion due to strong
susceptibility effects near metal, with little or no
signal from important joint tissues such as tendons and
cortical bone which have very short T2s. 3D ultrashort
echo time (UTE) imaging sequences together with multiple
spectral imaging (MSI) can potentially image short T2
tissues and minimize metal artifact. However, 3D UTE-MSI
is time-consuming. In this study we aimed to develop 3D
UTE-MSI using with vastly undersampling to reduce scan
time and a tight-frame regularized compressive sensing
(TFCS) technique to reduce streak artifacts. T1,
magnetization transfer ratio (MTR) and water content of
tissues near metal can potentially being measured using
a clinical whole-body scanner
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