MR detectors that conform to individual patients and anatomy are a long-standing goal dating back to the 1980s. Rigid-adjustable and flexible coil designs have been proposed. The highest degree of wearability and adaptation is arguably achieved with stretchable coils. In this work, we present highly stretchable and lightweight receive coils realized by containing eutectic Gallium Indium liquid metal in silicone tubes. Particular emphasis is placed on assessing stretching behavior in terms of Q, SNR and integrity of liquid metal containment. Practical utility is explored with a 4-channel array implementation used to image flexion of the human knee at 3T.
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