자기공명영상검사 시 26cm 이하 영상영역의 Multi-Transmit 기법의 유용성 = A Effectiveness of Multi-Transmit Parallel Technique on Magnetic Resonance Imaging of FOV Less Than 26cm

국문 초록 (Abstract)

본 연구는 유전체 효과를 줄이기 위해 26cm 영상영역 이상에서 사용하고 있는 Multi-transmit 기법을 26cm 이하에 적용하여 유용성을 알아보고자 하였다.
연구방법은 ACR 팬텀에 26cm 이하의 영상영역을 설정한 후, Multi-transmit 기법 적용 전ㆍ후 T1, T2강조영상의 균일도와 신호 대 잡음비, 영상획득시간을 비교하였다.
연구결과, 영상의 균일도와 SNR은 적용 후 유의한 차이가 없었으며, 영상획득시간은 적용 전에 비해, T1강조영상에서 46.8%, T2강조영상에서 18.9% 감소하였다.
결론적으로 Multi-transmit 기법을 26cm 이하의 얇은 부위에 적용하면, 영상의 질은 유지하면서 영상획득시간을 획기적으로 줄일 수 있어 임상적용에 유용하리라 사료된다.

다국어 초록 (Multilingual Abstract)

The purpose of this study was to prospectively estimate the effectiveness of multi-transmit parallel tech-nique in reduced FOV(Field of View) less than 26 cm.
Homogeneity, SNR(signal to noise ratio) and acquisition time were measured and compared by setting FOV less than 26cm on the T1 and T2 weighted images using ACR phantom.
The multi-transmit parallel technique resulted in significantly faster image acquisition by 46.8 % in T1 weighted images and 18.9% in T2 weighted images. The homogeneity and SNR values had no significant difference between pre and post application of the multi-transmit parallel technique.
In conclusion, this study demonstrates the feasibility of multi-transmit parallel technique in FOV less than 26cm with a rapid acquisition and maintained image quality.

목차 (Table of Contents)

• 국문초록
• Ⅰ. 서론
• Ⅱ. 연구방법
• Ⅲ. 연구결과
• Ⅳ. 고찰
• Ⅴ. 결론
• 참고문헌
• Abstract

참고문헌 (Reference)

1 김홍준, "고자장 MRI에서의 영상 영역에 대한 균질성" 한국전자파학회 23 (23): 96-100, 2012

2 Schick, F, "Whole-body MRI at high field, technical limits and clinical potential" 15 (15): 946-959, 2005

3 Escobedo EM, "Usefulness of turbo spinecho MR imaging in the evaluation of meniscal tears: comparison with a conventional spinecho sequence" 167 (167): 1223-1227, 1996

4 Van den Bergen B1, "Ultra fast electromagnetic field computations for RF multitransmit techniques in high field MRI" 54 (54): 1253-1264, 2009

5 Terry Duggan-Jahns, "The Evolution of Magnetic Resonance Imaging, 3T MRI in Clinical Applications"

6 W. Wei, "Simultaneous MRI acquisition of Both Knee Joints with Multitransmit Technology at 3T" 2011

7 Golay X, "Scan time reduction in proton magnetic resonance spectroscopic imaging of the human brain" 47 (47): 384-387, 2002

8 Pruessmann KP, "SENSE: sensitivity encoding for fast MRI" 42 (42): 952-962, 1999

9 Katscher, U, "RF encoding using a multi-element parallel transmit system" 63 (63): 1463-1470, 2010

10 Panych LP, "On replacing the manual measurement of ACR phantom images performed by MRI technologists with an automated measurement approach" 2015

11 Song HK, "Multislice Double Inversion Pulse Sequence for Efficient Black-Blood MRI" 47 (47): 616-620, 2002

12 D. W. McRobbie, "MRI – From Picture to Proton" 2003

13 Jerrolds, J, "MRI Safety at 3T versus 1.5T" 11 (11): 2010

14 Rahbar H, "Improved B1 homogeneity of 3 Tesla breast MRI using dual-source parallel radiofrequency excitation" 35 (35): 1222-1226, 2012

15 Jia H, "Impact of 3.0 T Cardiac MR Imaging Using Dual-Source Parallel Radiofrequency Transmission with Patient-Adaptive B1 Shimming" 8 (8): 2013

16 Mihara, H, "Imaging of the dielectric resonance effect in high field magnetic resonance imaging" 97 (97): 10R 305-, 2005

17 Brink WM1, "High permittivity dielectric pads improve high spatial resolution magnetic resonance imaging of the inner ear at 7 T" 49 (49): 271-277, 2014

18 Bauer JS, "Fast high-spatial-resolution MRI of the ankle with parallel imaging using GRAPPA at 3 T" 189 (189): 240-245, 2007

19 Willinek WA1, "Dual-Source Parallel Radiofrequency Excitation Body MR Imaging Compared with Standard MR Imaging at 3.0T" 256 (256): 966-975, 2010

20 Nelles M, "Dual-Source Parallel RF Transmission for Clinical MR Imaging of the Spine at 3.0 T, Intraindividual Comparison with Conventional Single-Source Transmission" 257 (257): 743-753, 2010

21 Yoo KH, "Common Hip Diseases and Their Imaging Studies" 1 (1): 40-49, 2008

22 G. M. Kukuk, "Clinical liver MRI at 3.0 Tesla using parallel RF transmission with patient-adaptive B1 shimming" 2009

23 Graesslin I1, "A specific absorption rate prediction concept for parallel transmission MR" 68 (68): 1664-1674, 2012

24 Son. C. H., "3.0 Tesla MR Clinical Application" 33 (33): 94-100, 2005