Abstract #0937

Silent, Free-Breathing B1+ Mapping using DREAM

Kay Nehrke¹ and Peter Börnert^1,2

¹Philips Research, Hamburg, Germany, ²Radiology, LUMC, Leiden, Netherlands

To improve the workflow for B₁⁺ calibration on a dual transmit MRI system, the DREAM B₁⁺ mapping sequence has been streamlined for acoustic noise reduction and free-breathing acquisition using a standard external respiratory motion sensor. About 10 dB reduction in sound pressure level were achieved by optimizing the echo order with respect to gradient strength reduction. Feasibility was shown in volunteer experiments on abdominal B₁⁺ mapping.

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