Abstract #3688

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

Zheng Zhong^1,2, Kaibao Sun², Guangyu Dan^1,2, Muge Karaman^1,2, and Xiaohong Joe Zhou^1,2,3,4

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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