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Ultrasound echoes as biometric navigators
Magnetic Resonance in Medicine, 06/08/2012
Schwartz BM et al. – Results in motorized linear motion phantoms and freely breathing animals indicate that the system performs well. Apparent motion is reduced by up to 97.8%, and motion artifacts are reduced or eliminated in two–dimensional spoiled gradient–echo images. The motion compensation is sufficient to permit MRI thermometry of focused ultrasound heating during respiratory–like motion, with results similar to those obtained in the absence of motion. This new technique may have applications for MRI thermometry and other dynamic imaging in the abdomen during free breathing.