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MRI Safety: RF Burns Causes and Prevention - Coursework Example

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The study "MRI Safety: RF Burns – Causes and Prevention" examines evaluates the causes of RF burns and the preventive measures that can be taken to reduce the incidence of RF burns. The paper focuses on heat stress in RF technology in MRI, detailed information on the prevention of the RF burns…
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MRI Safety: RF Burns Causes and Prevention
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Download file to see previous pages Bio-effects of MRI refer to the biological effects that occur to the human body, as a result of the interaction between the magnetic resonance (MR) scanner and the human body. These bio-effects can be classified into three, namely, the static field effects, the time-varying field or the gradient, and the radio-frequency (RF) effects. Tissue healing can occur through excessive RF interaction in patients, leading to RF burns (Liney, 2010). This paper evaluates the causes of RF burns and the preventive measures that can be taken to reduce the incidence of RF burns.
According to Shellock 2000, p.30, “Radiofrequency (RF) energy is non-ionizing, electromagnetic radiation in the frequency range 0-3000 GHz.” Evidence from more than three decades of research has demonstrated that RF radiation exposure can have many physiological impacts on the human body. These physiological effects are essentially caused by the RF-induced tissue healing in the human body. During MRI diagnostic examinations, a large portion of the RF energy employed in imaging or spectroscopy gets converted into thermal energy in the tissues of the individual under investigation, due to resistive losses. Therefore, the main bio-effects due to the RF radiation used in MRI technology are a direct consequence of the thermogenic qualities of this electromagnetic field (Shellock, 2000).
Potential risks for individuals in diagnostic imaging using MRI technology relate to the individuals under imaging evaluation and those individuals close to the MRI imaging device, stemming from exposure to the static magnetic field (B0), magnetic field gradients of time variance (dB/dT), and radiofrequency (RF) magnetic fields (B1). The important issues relating to the safety of RF fields during MRI diagnostic imaging pertain to thermal heating, which results in current burns and contacts burns from the heat stress that is generated. ...Download file to see next pagesRead More
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