MAGNETIC RESONANCE IMAGING AND ASSOCIATED ALTERATION IN SOME BIOPHYSICAL PROPERTIES OF BLOOD

M.A. ALI

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MAGNETIC RESONANCE IMAGING AND ASSOCIATED ALTERATION IN SOME BIOPHYSICAL PROPERTIES OF BLOOD

机译：血液某些生物物理特性的磁共振成像和相关交替

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The safety aspects of the magnetic resonance imaging (MRI) requires an understanding of the interactions between the electric and magnetic fields generated by such instruments and the human body. Knowledge of MRI safety can not only guide radiofrequency coil and pulse sequence design but can also affect sequence selections, thereby ensuring safe and efficient system operation. However, in addition to the static magnetic field, power intense sequences, fast gradient switching, and localized imaging / spectroscopy all have the potential of subjecting the human body to intense magnetic and electric field fluctuations. This further accentuates the need for a detailed understanding of the effects of exposure to these fields. Such an effect was evaluated for 25 patients subjected to MRI through measurements of some biophysical properties of erythrocytes. Results showed that there is a significant decrease (p 0.05). Scanning electron microscope (SEM) was used to follow the morphological modification of erythrocytes during MRI. It is concluded that a relatively large force (high magnet and RF) causes the membrane to undergo a continuous deformation. Removal of the force results in the cessation of deformation of the RBC membrane (reversible changes). These results confirm the safety of MRI.

机译：磁共振成像（MRI）的安全方面要求了解此类仪器与人体产生的电场和磁场之间的相互作用。 MRI安全知识不仅可以指导射频线圈和脉冲序列设计，还可以影响序列选择，从而确保系统安全有效地运行。但是，除了静磁场外，强磁场序列，快速梯度切换和局部成像/光谱学都可能使人体遭受强磁场和电场的波动。这进一步强调了需要详细了解暴露于这些领域的影响的需求。通过测量红细胞的某些生物物理特性，对25名接受MRI的患者评估了这种效果。结果表明有显着降低（p 0.05）。扫描电子显微镜（SEM）用于追踪MRI期间红细胞的形态学变化。可以得出结论，相对较大的力（高磁体和RF）会导致薄膜发生连续变形。力的去除导致RBC膜的变形停止（可逆变化）。这些结果证实了MRI的安全性。

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《Romanian Journal of Biophysics》 |2007年第4期|共10页
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M.A. ALI;
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MAGNETIC RESONANCE IMAGING AND ASSOCIATED ALTERATION IN SOME BIOPHYSICAL PROPERTIES OF BLOOD

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