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http://dx.doi.org/10.5392/JKCA.2020.20.02.472

Alternative Input Lower Weight Information Method Error to Reduce Specific Absorption Rate in MRI  

Choi, Kwan-Woo (원광보건대학교 방사선과)
Publication Information
The Journal of the Korea Contents Association / v.20, no.2, 2020 , pp. 472-477 More about this Journal
Abstract
The purpose of this study is to correct the error of lower weight input method as an alternative to reduce the specific absorption rate(SAR) in MRI. In order to prove that the SAR values not change according to the weight entered into the patient information, the 50kg phantom is placed in the coil and the input weight is changed from 10 to 100 in 10kg units to compare the SAR values. As a result, T1-weighted images had a SAR rate of 0.2W/kg and T2-weighted images had an average of 0.4W/kg. In conclusions, the SAR does not change according to the weight input by the technician before the scan, a lower weight when inputting patient information cannot be an alternative to reduce the SAR.
Keywords
Specific Absorption Rate; Input Weight; Specific Energy Dose; Peripheral Nerve Stimulation Levels; Magnetic Resonance Imaging;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 Z. Wang, J. C. Lin, W. Mao, W. Liu, M. B. Smith, and C. M. Collins, "SAR and temperature: simulations and comparison to regulatory limits for MRI," Journal of Magnetic Resonance Imaging, Vol.26, No.2, pp.437-441, 2007.   DOI
2 IEC Std. 62209-1, Procedure to determine the Specific Absorption Rate for Hand-held Devices used in close Proximity to the Ear(frequency range of 300 MHz to 3 GHz), 2005.
3 IEEE P1528/D.1.2, Recommended Practice for Determining the Peak Spatial-Average Specific Absorption Rate in the Human Head from Wireless Communications Devices; Measurement Techniques, IEEE WGI of SC2 of IEEE SCC 34, 2003.
4 H. H. Pennes, "Analysis of tissue and arterial blood temperatures in the resting human forearm," Journal of applied physiology, Vol.1, No.2, pp.93-122, 1948.   DOI
5 L. Guoqing and Z. Dongyi, "SAR Measurement Guidance for WiMAX Equipments," Safety & EMC, Vol.2, p.3, 2011.
6 K. W. Choi and S. Y. Son, "Usefulness of the Technique of Collecting Signals by Selecting Elements from RF Receive Phase Array Coil in Magnetic Resonance Imaging," The Journal of the Korea Contents Association, Vol.18, No.6, pp.461-466, 2018.   DOI
7 H. Lee, 자기공명 영상과 분광법의 이해, 계명대학교 출판부, 2016.
8 J. W. Bulte, T. Ben-Hur, B. R. Miller, R. Mizrachi-Kol, O. Einstein, E. Reinhartz, H. A. Zywicke, T. Douglas, and J. A. Frank, "MR microscopy of magnetically labeled neurospheres transplanted into the Lewis EAE rat brain," Magnetic Resonance in Medicine, Vol.50, No.1, pp.201-205, 2003.   DOI
9 M. L. Zelivyanskaya, J. A. Nelson, L. Poluektova, M. Uberti, M. Mellon, H. E. Gendelman, and M. D. Boska, "Tracking superparamagnetic iron oxide labeled monocytes in brain by high-field magnetic resonance imaging," Journal of neuroscience research, Vol.73, No.3, pp.284-295, 2003.   DOI
10 L. Zaremba, FDA Guidelines for Magnetic Resonance Equipment Safety, Center for Devices and Radiological Health , Food and Drug Administration, 2012.
11 American National Standards Institute, American National Standard Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 300 KHz to 100GHz, IEEE, 1982.
12 한재복, 두부 MRI 검사에서 매개변수 변화에 따른 SAR 저감 프로토콜에 관한 연구 , 전남대학교, 박사학위논문, 2013.
13 대한자기공명의과학회, 자기공명영상학, 일조각, 2008.
14 A. M. M. El-Sharkawy, D. Qian, P. A. Bottomley, and W. A. Edelstein, "A multichannel, real-time MRI RF power monitor for independent SAR determination," Medical physics, Vol.39, No.5, pp.2334-2341, 2012.   DOI
15 J. B. Han, S. H. Hong, N. G. Choi, and H. J. Seong, "Analysis of Specific Absorption Rate in Magnetic Resonance Imaging," The Journal of the Korea Contents Association, Vol.13, No.2, pp.308-313, 2013.   DOI
16 D. Qian, A. M. M. El-Sharkawy, P. A. Bottomley, and W. A. Edelstein, "An RF dosimeter for independent SAR measurement in MRI scanners," Medical physics, Vol.40, No.12, p.122303, 2013.   DOI
17 G. Brix, M. Reinl, and G. Brinker, "Sampling and evaluation of specific absorption rates during patient examinations performed on 1.5-Tesla MR systems," Magnetic resonance imaging, Vol.19, No.6, pp.769-779, 2001.   DOI