MR-guided breast tumor ablation and temperature imaging system

Details MR-guided breast tumor ablation and temperature imaging system MR-guided breast tumor ablation and temperature imaging system

2002-08-22

2009-06-02

Le, Long V (Department: 3768)

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

C600S411000, C600S419000, C600S420000, C324S300000, C324S315000

Reexamination Certificate

active

07542793

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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