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Diffusion-Weighted MR Imaging of Upper Abdomen: Comparison of Breath-Hold, Free-Breathing, and Respiratory-Triggered Techniques

Other Titles
 상복부의 확산강조자기공명영상: 호흡정지기법, 자유호흡기법, 호흡유발기법간의 비교 
 Kyung Eun Cho  ;  Jeong-Sik Yu  ;  Ki Whang Kim  ;  Joo Hee Kim  ;  Jae-Joon Chung 
 Journal of the Korean Radiological Society (대한영상의학회지), Vol.64(5) : 465-473, 2011 
Journal Title
 Journal of the Korean Radiological Society  (대한영상의학회지) 
Issue Date
PURPOSE: To compare the image quality and stability of apparent diffusion coefficient (ADC) in diffusion-weighted MRI (DWI) of the upper abdomen among the breath-hold (BH), free-breathing (FB) and respiratory-triggered (RT) techniques. MATERIALS AND METHODS: We analyzed the qualitative and quantitative parameters of 204 consecutive patients who underwent DWI (BH-DWI, FB-DWI or RT-DWI; n=68 in each technique). Qualitative parameters included liver contour, vascular landmarks, intra-slice homogeneity, and inter-slice discontinuity on DWI with a b-factor of 800 s/mm2 and a four-grade scale. Quantitative parameters included inter-slice or intraslice inhomogeneity of ADC in the spleen. RESULTS: RT-DWI showed better liver contour compared to BH-DWI (p < 0.001) or FB-DWI (p = 0.001). As for the quality of the vascular landmarks, BH-DWI was inferior to FB-DWI (p = 0.025) and RT-DWI (p < 0.001). FB-DWI had the poorest result (p < 0.001) for inter-slice discontinuity compared to the other techniques. FB-DWI showed significantly larger inter-slice differences between the highest and the lowest ADCs in the spleen compared with those of RT-DWI (p < 0.001). Intra-slice homogeneity was significantly better in RT-DWI and FB-DWI than in BH-DWI (p < 0.001). CONCLUSION: Compared with BH or FB techniques, RT-DWI appears to result in the best imaging by providing better anatomic detail without skipping continuous slices, in addition to more homogeneous ADCs
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실)
Yonsei Authors
김기황(Kim, Ki Whang) ; 김주희(Kim, Joo Hee) ; 유정식(Yu, Jeong Sik) ; 정재준(Chung, Jae Joon)
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