A Study on Dynamic Susceptibility-weighted Perfusion MR Imaging at High Magnetic Filed : Comparison of Gradient Echo-EPI and Spin Echo-EPI
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(2) 대한디지털의료영상학회논문지 9(2)：12, 2007 Journal of the Korean Society for Digital Imaging in Medicine. Ⅲ. 결 과. Ⅱ. 대상 및 방법. Table 1. Average SNRs of white and gray matter with both methods in 75 adults and 25 pediatric patients Pulse sequences. White matter(SNR). Gray matter(SNR). Gradient echo EPI 36.74±06. 39.96±09 Spin echo EPI. 46.24±11 51.83±13. - 12 -.
(3) 고 자장에서 Dynamic Susceptibility Contrast 효과에 관한 연구 : Gradient EPI와 Spin-EPI기법의 비교보호. Fig. 1. Comparison of white and gray matter with time-signal intensity(SI) curve of Gradient echo EPI in 75 adults and 25 pediatric patients(a : adults, b : pediatric patients). Fig. 2. Comparison of white and gray matter with time-signal intensity(SI) curve of Spin echo EPI in 75 adults and 25 pediatric patients(a : adults, b : pediatric patients). - 13 -.
(4) 대한디지털의료영상학회논문지 9(2)：12, 2007 Journal of the Korean Society for Digital Imaging in Medicine. Table 2. Average SIs of white and gray matter with both methods in 75 adults and 25 pediatric patients Pulse sequences. White matter(SI). Gray matter(SI). Gradient echo EPI Spin echo EPI. 464.5±13.84 187.33±15.24. 879.2±27.04 140.66±13.45. a. c. b. d. Fig. 3. Comparison of distortion aspect according to both methods in adults and pediatric patients(a : adults, b : pediatric patients, GE EPI(a, b), SE EPI(c, d).. a. b. Fig. 4. Comparison of activation areas of rCBV with single shot spin and gradient echo EPI(a : GE EPI, b : SE EPI) and spin echo EPI method showed a small veins at yellow color(arrow head) such as above b.. - 14 -.
(5) 고 자장에서 Dynamic Susceptibility Contrast 효과에 관한 연구 : Gradient EPI와 Spin-EPI기법의 비교보호. Ⅳ. 고 찰. Ⅴ. 결 론. - 15 -.
(6) 대한디지털의료영상학회논문지 9(2)：12, 2007 Journal of the Korean Society for Digital Imaging in Medicine. 참고문헌. - 16 -.
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