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Purpose
Signal voids caused by metallic needles pose visualization and monitoring challenges in many MRI applications. In this work, we explore a solution to this problem in the form of an active shim insert that fits inside a needle and corrects the field disturbance (ΔB0) caused by the needle outside of it.
Methods
The ΔB0 induced by a 4 mm outside‐diameter titanium needle at 3T is modeled and...
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