Enhanced Ultrasound Visualization of Brachytherapy Seeds by a Novel Magnetically Induced Motion Imaging Method
Annual rept. 1 Apr 2006-31 Mar 2007
ROCHESTER UNIV NY
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We report our progress in developing Magnetically Induced Motion Imaging MIMI for unambiguous identification and localization brachytherapy seeds in ultrasound images. In this period we have used finite-element models to determine a torque maximizing seed core shape to generate the greatest possible seed vibration for a given core volume. We present two new signal-processing methods. The first is a compounding method for suppression of comet-tail artifacts in segmented seed images. The second is a method for joining ends of seeds in segmented seed images based on the phase of the detected vibration signal. Both methods are demonstrated in vitro using a commercial ultrasound scanner and tissue-mimicking phantoms.
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