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Abstract #3688

MRI with Sub-millisecond Temporal Resolution over a Reduced Field of View

Zheng Zhong1,2, Kaibao Sun2, Guangyu Dan1,2, Muge Karaman1,2, and Xiaohong Joe Zhou1,2,3,4
1Bioengineering, University of Illinois at Chicago, Chicago, IL, United States, 2CMRR, University of Illinois at Chicago, Chicago, IL, United States, 3Radiology, University of Illinois at Chicago, Chicago, IL, United States, 4Neurosurgery, University of Illinois at Chicago, Chicago, IL, United States

Sub-millisecond Periodic Event Encoded Dynamic Imaging or SPEEDI (also known as SMILE) has been reported to be capable of achieving sub-millisecond temporal resolution. However, the total scan times of this technique is typically very long. In this study, we have incorporated two techniques – reduced field of view (rFOV) and echo-train acquisition – into a SPEEDI sequence to substantially reduce the total scan times. This sequence, which we call re-SPEEDI, has been demonstrated in phantom experiments for capturing rapidly changing currents in a wire loop with a temporal resolution of 0.6ms-0.8ms.

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