MR-guided breast tumor ablation and temperature imaging system
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United States of America Patent
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Jun 2, 2009
Grant Date -
Feb 26, 2004
app pub date -
Aug 22, 2002
filing date -
Aug 22, 2002
priority date (Note) -
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Abstract
An MRI system is employed to aim an ultrasonic transducer at tissues to be treated and to produce images which enable the treatment of the tissues to be monitored. A pulse sequence is used which produces both a spin-echo NMR signal and a gradient-echo NMR signal and changes in phase between these two signals is measured and used to produce a temperature map. Changes in amplitude of the spin-echo NMR signal from a reference spin-echo NMR signal is used to produce images which indicate temperature changes in both fat and water. These temperature maps may be used to aim the heat treatment device.
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