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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 
Authors
 Kyung Eun Cho ; Jeong-Sik Yu ; Ki Whang Kim ; Joo Hee Kim ; Jae-Joon Chung 
Citation
 Journal of the Korean Society of Radiology (대한영상의학회지), Vol.64(5) : 465~473, 2011 
Journal Title
 Journal of the Korean Society of Radiology (대한영상의학회지) 
ISSN
 1738-2637 
Issue Date
2011
Abstract
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
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/94541
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Radiology
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