Abstract #2347
Simplifying MR-guided focused ultrasound experiments by using the water bath as an intrinsic high mode dielectric resonator.
Andrew Webb 1
1
Radiology, C.J.Gorter Center for High Field
MRI, Leiden, Zuid Holland, Netherlands
The standard setup for MR-guided FUS includes a
transducer, water bath integrated into the patient
table, and either a specialized RF coil placed close to
the patient, or else the body coil is used as the
receiver. However, the body coil has low sensitivity and
a local RF coil can interfere with ultrasound
irradiation. Here a completely new approach is presented
in which an RF coil is not needed at all: the dimensions
of the water bath are adjusted so that a high order
dielectric mode is excited, resulting in efficient MR
excitation and reception at the transducer focal point.
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