Simultaneous radiofrequency (RF) heating and magnetic resonance (MR) thermal mapping using an intravascular MR imaging/RF heating system
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 کاملDevelopment of an intravascular heating source using an MR imaging guidewire.
PURPOSE To develop a novel endovascular heating source using a magnetic resonance (MR) imaging guidewire (MRIG) to deliver controlled microwave energy into the target vessel for thermal enhancement of vascular gene transfection. MATERIALS AND METHODS A 0.032-inch MRIG was connected to a 2.45-GHz microwave generator. We 1) calculated the microwave power loss along the MRIG, 2) simulated the po...
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During an MR procedure, most of the transmitted RF power is transformed into heat within the patient's tissue as a result of resistive losses. Not surprisingly, the primary bioeffects associated with the RF radiation used for MR procedures are directly related to the thermogenic qualities of this electromagnetic field. This review article discusses the characteristics of RF energy-induced heati...
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Introduction/Purpose Small inductively coupled RF coils have already been suggested or used as MR reference markers for various purposes, for example automatic patient registration, stereotactic planning, and visualization of devices inside the magnet [1-4]. Such markers may also be suitable for the guidance of intravascular devices (catheters) because they require no electrical connection to t...
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Knowledge about the magnetic eld distribution in radio frequency coils is important for both magnetic resonance imaging and magnetic resonance spectroscopy. The information about the eld's distribution is used to obtain correct excitation pulse ip angles, as well as to perform signal strength corrections. Another use is also accelerating imaging and spectroscopic examinations, where accurate de...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2005
ISSN: 0740-3194
DOI: 10.1002/mrm.20521