Useful Parameters in Dynamic Contrast-enhanced Ultrasonography for Identifying Early Response to Chemotherapy in a Rat Liver Tumor Model

• Material Type: 博士論文
• Title: Useful Parameters in Dynamic Contrast-enhanced Ultrasonography for Identifying Early Response to Chemotherapy in a Rat Liver Tumor Model
• Author/Editor: Taiji, Ryosuke; Nishiofuku, Hideyuki; Tanaka, Toshihiro; Minamiguchi, Kiyoyuki; Fukuoka, Yasushi; Saito, Natsuhiko; Taguchi, Hidehiko; Matsumoto, Takeshi; Marugami, Nagaaki; Hirai, Toshiko; Kichikawa, Kimihiko
• Author Heading: Taiji, Ryosuke; Nishiofuku, Hideyuki; Tanaka, Toshihiro; Minamiguchi, Kiyoyuki; Fukuoka, Yasushi; Saito, Natsuhiko; Taguchi, Hidehiko; Matsumoto, Takeshi; Marugami, Nagaaki; Hirai, Toshiko; Kichikawa, Kimihiko
• Publication, Distribution, etc.: Scientific Scholar
• Publication Date: 2021-03-15
• Publication Date (W3CDTF): 2021-03-15
• Alternative Title: ラット肝腫瘍モデルにおける化学療法の早期効果判定に有用なダイナミック造影超音波のパラメータについて
• Degree grantor/type: 奈良県立医科大学
• Date Granted: 2023-03-15
• Date Granted (W3CDTF): 2023-03-15
• Dissertation Number: 甲第879号
• Degree Type: 博士（医学）
• Text Language Code: eng
• Subject Heading: Ultrasonography; Colon cancer; Rats; Biomarkers; Irinotecan; Contrast media
• Target Audience: 一般
• Note (General): type:Thesis; Objectives: The objective of the study is to determine a parameter on the time-intensity curve (TIC) of dynamiccontrast-enhanced ultrasonography (DCE-US) that best correlates with tumor growth and to evaluate whetherthe parameter could correlate with the early response to irinotecan in a rat liver tumor model.Material and Methods: Twenty rats with tumors were evaluated (control: Saline, n = 6; treatment: Irinotecan,n = 14) regarding four parameters from TIC: Peak intensity (PI), k value, slope (PI × k), and time to peak (TTP).Relative changes in maximum tumor diameter between day 0 and 10, and parameters in the first 3 days wereevaluated. The Mann-Whitney U-test was used to compare differences in tumor size and other parameters.Pearson’s correlation coefficients (r) between tumor size and parameters in the control group were calculated.In the treatment group, relative changes of parameters in the first 3 days were compared between responder andnon-responder (<20% and ≥20% increase in size on day 10, respectively).Results: PI, k value, PI × k, and TTP significantly correlated with tumor growth (r = 0.513, 0.911, 0.665, and 0.741,respectively). The mean RC in k value among responders (n = 6) was significantly lower than non-responders(n = 8) (mean k value, 4.96 vs. 72.5; P = 0.003).Conclusion: Parameters of DCE-US could be a useful parameter for identifying early response to irinotecan.; 博士（医学）・甲第879号・令和5年3月15日; ©2021 Published by Scientific Scholar on behalf of Journal of Clinical Imaging ScienceThis is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-Share Alike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.; identifier:Journal of clinical imaging science Vol.11 Article No.15 (2021 Mar); identifier:21567514; identifier:http://ginmu.naramed-u.ac.jp/dspace/handle/10564/4111; identifier:Journal of clinical imaging science, 11: Article No.15
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• Acquisition Basis: 博士論文（自動収集）
• Date Accepted (W3CDTF): 2023-12-05T21:41:07+09:00
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• Periodical Title (URI): http://hdl.handle.net/10564/4111
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