Earticle

초록

영어

The purpose of this study is to evaluate image blurring according to variation of the ETL and propose the clinically appropriate ETL range. SIEMENS MAGNETOM Skyra 3.0T and 20 channel head coil were used for the study. MRI phantom was kept the lines horizontally to three direction(X,Y,Z) of the coil and T1, T2 weighted images that used the fast spin echo technique acquired. The ETL with increase of 10 was applied from 10 to 80. In addition, the ETL with increase of 1 was applied in the interval statistically significant differences occurred. And T1, T2 weighted images that used the conventional spin echo technique acquired to compare image blurring of the images that used the fast spin echo technique. The slope of lattice in the images was measured using Image J 1.47v program to evaluate image blurring. And image blurring was determined by the degree of the slope. The statistical significance of both techniques was evaluated by the Kruskal-Wallis test of the SPSS 17.0v. And the correlation of the ETL and image blurring was evaluated quantitatively by regression analysis. The slope of the T1, T2 weighted images that used fast spin echo technique decreased as contrasted with conventional spin echo technique. In the result of the Kruskal-Wallis test, the T1, T2 weighted images that used fast spin echo technique made a significant difference with conventional spin echo technique. Particularly, in the Tomhane’ T2 test, the T1, T2 weighted images made a significant difference from ETL 22 and 31 respectively. In the result of the regression analysis, the R-squared of the T1, T2 weighted images are 0.762 and 0.793. It is difficult to apply the long ETL in the T1 weighted image caused by the short TR and multi-slices study. Therefore, clinical impact according to variation of the ETL is very slight in the T1 weighted images. But the application of the proper ETL is demanded in T2 weighted images using the fast spin echo technique in order to prevent image blurring.

목차

Abstract
Ⅰ. 서론
Ⅱ. 대상 및 방법
1. 팬텀 영상획득
2. 영상 blurring의 정량적 분석
3. 통계분석 방법
Ⅲ. 결과
Ⅳ. 결론 및 고찰
참고문헌

키워드

저자

• 권순용 [ Soon-Yong Kwon | 건국대학교병원 영상의학과 ]
• 임우택 [ Woo-Taek Lim | 건국대학교병원 영상의학과 ]
• 강충환 [ Chung-Hawn Kang | 건국대학교병원 영상의학과 ]
• 김경수 [ Kyeong-Soo Kim | 건국대학교병원 영상의학과 ]
• 김순배 [ Soon-Bae Kim | 건국대학교병원 영상의학과 ]
• 김현수 [ Hyun-Soo Kim | 신구대학교 방사선과 ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  대한디지털의료영상학회논문지 [Korean Journal of Digital Imaging in Medicine]

• 간기

  연3회

• pISSN

  1976-7641

• 수록기간

  1995~2025

• 십진분류

  KDC 510 DDC 610