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KMID : 1151820170110010049
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Journal of the Korean Society of Radiology
2017 Volume.11 No. 1 p.49 ~ p.54
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Effective of Body Temperature Increasing during Brain MRI scan
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Kim Myeong-Seong
Lee Jong-Woong
Jung Jae-Eun
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Abstract
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As the Radiofrequency(RF) increases with the magnetic field strength, the wavelength of the RF excitation field becomes smaller, which leads to more the thermal effect in the human-body placed in the electric field. MRI scanner used was GE signa 1.5T, HDx 3.0T and Philips 3.0T with same routine clinical sequence protocol. Therefore temperature was measured before and after each scan. Taken the temperatures in the ear with ear infra-red type thermometer(Braun co). 3.0T were temperature increases more than 0.15℃ and GE 3.0T MRI equipment about 0.14 ℃ higher than the Philips 3.0T MRI(p<0.012). Psychogenic status was investigated by the survey respondents about their status can not just answer therefore, a little different from the expected. In our study of Thermal effect of clinical MRI with clinical protocol sequence, we found that the 3.0T in the body-temperature rise was greater than the 1.5T. Therefore, in clinical 3.0T examine the dangerous situation caused by the temperature rise occurred (burns, impaired thermoregulatory mechanism in patients with high-temperature damage, exhaustion occurs due to excessive sweating), not to appear the more watched the patient s condition with procedure.
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KEYWORD
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MRI, RF, Thermal effect, 1.5T, 3.0T
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