Cited 0 times in
Diffusion-weighted MR imaging of upper abdomen : comparison of breath-hold, free-breathing, and respiratory-triggered techniques in image quality and apparent diffusion coefficient (ADC) stability
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 조경은 | - |
dc.date.accessioned | 2015-12-24T08:44:24Z | - |
dc.date.available | 2015-12-24T08:44:24Z | - |
dc.date.issued | 2011 | - |
dc.identifier.uri | https://ir.ymlib.yonsei.ac.kr/handle/22282913/134112 | - |
dc.description | Dept. of Medicine/석사 | - |
dc.description.abstract | Purpose: To compare the image quality and stability of apparent diffusion coefficient (ADC) in the diffusion-weighted MRI (DWI) of upper abdomen among breath-hold (BH), free-breathing (FB) and respiratory-triggered (RT) techniques.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 mm2/s using a 4-grade scale. Quantitative parameters included inter-slice or intra-slice 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). Regarding the quality of vascular landmarks, BH-DWI had inferior results compared 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. | - |
dc.description.statementOfResponsibility | open | - |
dc.publisher | Graduate School, Yonsei University | - |
dc.rights | CC BY-NC-ND 2.0 KR | - |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/2.0/kr/ | - |
dc.title | Diffusion-weighted MR imaging of upper abdomen : comparison of breath-hold, free-breathing, and respiratory-triggered techniques in image quality and apparent diffusion coefficient (ADC) stability | - |
dc.title.alternative | 상복부 확산강조자기공명영상 : 호흡정지기법, 자유호흡기법, 호흡유발기법간의 비교 | - |
dc.type | Thesis | - |
dc.contributor.alternativeName | Cho, Kyung Eun | - |
dc.type.local | Thesis | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.