Abstract #3946

Phase Modulated Array Coil Image Reconstruction: A means to correct B1+/- signal modulations for sodium Tx/Rx Array Coil at 3T

Yongxian Qian¹, Tiejun Zhao², Steven Baete¹, Karthik Lakshmanan¹, Graham Wiggins¹, and Fernando E Boada¹

¹Radiology, New York University, New York, NY, United States, ²Siemens Medical Solutions USA, New York, NY, United States

A transmit/receive (Tx/Rx) array coil has high efficiency in transmission and thus reduces specific absorption rate (SAR), which is highly desired in clinical applications for sodium (23Na) MR imaging. However, a Tx/Rx array coil at 3T usually produces a spatially-varying excitation (B1+) field and does not provide a uniform sum-of-squares of coil sensitivities (B1- fields) for quantitative sodium MRI. Here we present a solution to this problem and demonstrate its effectiveness with studies on phantoms and subjects with neurological disorders such as multiple sclerosis (MS), epilepsy, and mild traumatic brain injury (mTBI).

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