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Abstract #3865

Evolution of Image Quality in View-Shared Time-Resolved 3D CE-MRA

Casey P. Johnson1, Thomas W. Polley1, James F. Glockner1, Phillip M. Young1, Stephen J. Riederer1

1MR Research Laboratory, Mayo Clinic, Rochester, MN, United States

In time-resolved 3D CE-MRA, incomplete view sharing will result in degradation of image quality. This has been observed in traditional imaging and new applications. The loss of image quality is dependent on the specific time-resolved sequence parameters used. In this work, the evolution of image quality as view sharing progresses is quantitatively assessed in phantoms and in vivo CE-MRA calf studies for various sequence parameters. A fundamental tradeoff between vessel signal and sharpness and its relation to the sequence temporal footprint is investigated. Implications for various applications are discussed.

Keywords

acceleration account acquisition advancing aliasing altered angiography application appropriate arbitrary arterial arteries artifacts assessed assigned benefit benefits bolus calf characterized chase choice clinic combination combinations complicated consideration consists constraint contrast corresponds cross dashed decreasing defined density depends described diameter diameters early edge either enables encoding ending enhanced enhancing evaluated evolution evolves example extends fidelity fluoroscopic footprint footprints frame frames full fully generic hand hypotheses important importantly improve in vivo incomplete increasing influence initial isotropic laboratory larger leading longer many measured modeled move must occur occurs offset often pace parallel peak peripheral pipe plot plots precise profile progression progressive quality rapid rapidly real recent reduce reduces reported resolution resolved resultant sample sampled sampling scale sections segment segmentation select selection sense series several shared sharing sharper sharpness short shorter simulate smaller space structures studies table target temporal tracking trends tricks twist units various vascular venous vessel vial view views ways window yield yielded yields young