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. Author manuscript; available in PMC: 2013 Nov 7.
Published in final edited form as: Proc SPIE Int Soc Opt Eng. 2009 Feb 25;7181:10.1117/12.812188. doi: 10.1117/12.812188

Figure 1.

Figure 1

Alternative MR compatible RF phased array applicators to be used at Duke University for heating deep tumors while monitoring temperature with MRTI.

a) 25 cm diameter waterbolus coupled four twin dipole mini-annular phased array applicator for extremity sarcomas, driven at 140 MHz

b) 5 antenna 140MHz phased array applicator for heating intact breast. Note silicone oil references inside the bolus for temperature insensitive MR signal to correct magnetic field drifts during the hour long treatments.

c) Hybrid arm applicator design with 8 dipole antennas at 140 MHz printed on the inside of a 18cm dia plexiglass cylinder and integrated birdcage coil printed on the outside of the plexiglass shell for simultaneous MR imaging

d) Sigma-Eye MR applicator design from BSD Corp. mounted on GE MR table with thermal mapping available to correlate with MRTI. Applicator has 3 rings of 4 twin dipoles driven at 100 MHz for axial and lateral adjustment of focal zone within the array.