https://scholars.lib.ntu.edu.tw/handle/123456789/611787
標題: | Quantification of amide proton transfer effect pre-And post-gadolinium contrast agent administration | 作者: | Tee Y.K. Donahue M.J. Harston G.W.J. Payne S.J. Chappell M.A. STEPHEN JOHN PAYNE |
關鍵字: | gadolinium;amide;contrast medium;proton;amide proton transfer imaging;Article;case report;contrast enhancement;human;internal carotid artery occlusion;limit of quantitation;nuclear magnetic resonance imaging;nuclear magnetic resonance scanner;priority journal;proton transport;relaxation time;white matter;algorithm;carotid artery obstruction;computer assisted diagnosis;diagnostic use;image enhancement;magnetic resonance angiography;pathology;procedures;reproducibility;sensitivity and specificity;Algorithms;Amides;Carotid Stenosis;Contrast Media;Gadolinium;Humans;Image Enhancement;Image Interpretation, Computer-Assisted;Magnetic Resonance Angiography;Protons;Reproducibility of Results;Sensitivity and Specificity | 公開日期: | 2014 | 卷: | 40 | 期: | 4 | 起(迄)頁: | 832-838 | 來源出版物: | Journal of Magnetic Resonance Imaging | 摘要: | Purpose: To compare quantification of the amide proton transfer (APT) effect pre-And post-gadolinium contrast agent (Gd) administration in order to establish to what extent Gd alters quantification of the APT effect. Materials and Methods: Four patients with internal carotid stenosis were recruited. APT imaging was acquired pre-And post-contrast in two sessions (before and after surgery) to assess the extent of relaxation time, T1, change on APT effect calculated using magnetization transfer ratio asymmetry analysis at offsets of ±3.5 ppm relative to water resonance. Statistical and modeling evaluations were performed on the pre-And post-contrast APT effect to study the sensitivity to contrast administration. Results: Before surgery, the post-contrast T1 was estimated to drop < 10% of the pre-value for the majority of the patients. After surgery, higher post-contrast T1 reductions were observed in all the patients (maximum decrease was about 20% of the pre-value). Consistent differences between pre-And post-contrast were seen in the APT effect quantified using the asymmetry measure in most regions of the brain, with significant differences found in the white matter at the group level and in 25%of the individual patient results. Conclusion: APT imaging should be performed prior to Gd administration to avoid potential misinterpretation of the APT effect. ? 2013 Wiley Periodicals, Inc. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84927797532&doi=10.1002%2fjmri.24441&partnerID=40&md5=211d9c3e436a1c4a27a86ab33315a393 https://scholars.lib.ntu.edu.tw/handle/123456789/611787 |
DOI: | 10.1002/jmri.24441 |
顯示於: | 應用力學研究所 |
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