Fast MRI of RF heating via phase difference mapping
نویسندگان
چکیده
منابع مشابه
Simultaneous radiofrequency (RF) heating and magnetic resonance (MR) thermal mapping using an intravascular MR imaging/RF heating system.
Previous studies have confirmed the possibility of using an intravascular MR imaging guidewire (MRIG) as a heating source to enhance vascular gene transfection/expression. This motivated us to develop a new intravascular system that can perform MR imaging, radiofrequncy (RF) heating, and MR temperature monitoring simultaneously in an MR scanner. To validate this concept, a series of mathematica...
متن کاملRF heating due to conductive wires during MRI depends on the phase distribution of the transmit field.
In many studies concerning wire heating during MR imaging, a "resonant wire length" that maximizes RF heating is determined. This may lead to the nonintuitive conclusion that adding more wire, so as to avoid this resonant length, will actually improve heating safety. Through a theoretical analysis using the method of moments, we show that this behavior depends on the phase distribution of the R...
متن کاملA Review of Rf Heating
The funadmental aspects of RF heating theory is reviewed and a summary of recent experimental results are given. All frequency regimes are covered, from very low frequency magnetic pumping to electron cyclotron resonance heating.
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Accurate and reliable guidance is crucial for catheter-based treatment of cardiac diseases such as atrial fibrillation. Magnetic resonance imaging (MRI) is a preferable choice because of good soft tissue contrast, 3D capability, and lack of ionizing radiation. Higher resolution imaging of the region of interest such as arteries and pulmonary vein is desirable. Intravascular MRI coils have been ...
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BACKGROUND The magnetic resonance imaging (MRI) radio frequency (RF) field induced heating on external fixation devices can be very high in the vicinity of device screws. Such induced RF heating is related to device constructs, device placements, as well as the device insertion depth into human subjects. In this study, computational modeling is performed to determine factors associated with suc...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2002
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.10067