Analysis of decrease in lung perfusion blood volume with occlusive and non-occlusive pulmonary embolisms

• Material Type: 博士論文
• Title: Analysis of decrease in lung perfusion blood volume with occlusive and non-occlusive pulmonary embolisms
• Author/Editor: Ikeda, Yohei
• Publication, Distribution, etc.: 新潟大学
• Publication Date: 2015-03-23
• Publication Date (W3CDTF): 2015-03-23
• Alternative Title: Analysis of decrease in lung perfusion blood volume with occlusive and non-occlusive pulmonary embolisms; 閉塞性および非閉塞性の肺塞栓症におけるLung PBVでの血流低下についての検討
• Degree grantor/type: 新潟大学
• Date Granted: 2015-03-23
• Date Granted (W3CDTF): 2015-03-23
• Dissertation Number: 甲第3970号
• Degree Type: 博士（医学）
• Conferring No. (Dissertation): 甲第3970号
• Text Language Code: eng
• Subject Heading: Computed tomography; Angiography; Dual energy; Perfusion; Pulmonary embolism
• Note (General): Purpose: The aim of this study was to determine if lung perfusion blood volume (lung PBV) with non-occlusive pulmonary embolism (PE) differs quantitatively and visually from that with occlusive PE and to investigate if lung PBV with non-occlusive PE remains the same as that without PE.. Materials and methods: Totally, 108 patients suspected of having acute PE underwent pulmonary dual-energy computed tomography angiography (DECTA) between April 2011 and January 2012. Presence of PE on DECTA was evaluated by one radiologist. Two radiologists visually evaluated the PE distribution (segmental or subsegmental) and its nature (occlusive or non-occlusive) on DECTA and classified per-fusion in lung PBV as “decreased,” “slightly decreased,” and “preserved”. Two radiologists used a lung PBV application to set a region of interest (ROI) in the center of the lesion and measured HU values of an iodine map. In the same slice as the ROI of the lesion and close to the lesion, another ROI was set in the normal perfusion area without PE, and HUs were measured. The proportion of lesions was compared between the occlusive and non-occlusive groups. HUs were compared among the occlusive, non-occlusive, and corresponding normal groups. Results: Twenty-five patients had 80 segmental or subsegmental lesions. There were 37 and 43 lesions in the occlusive and non-occlusive groups, respectively. The proportion of decreased lesions was 73.0% (27/37) in the occlusive group, while that of preserved lesions in the non-occlusive group was 76.7% (33/43). There was a significant difference in the proportion of lesions (P < 0.001) between the two groups. HUs of the iodine map were significantly higher in the non-occlusive group than in the occlusive group (33.8 ± 8.2 HU vs. 11.9 ± 6.1 HU, P < 0.001). There was no significant difference in HUs for the entire lesion between the non-occlusive (33.8 ± 8.2 HU) and corresponding normal group (34.5 ± 6.8 HU; P = 0.294). Conclusion: Iodine perfusion tended to be visually and quantitatively preserved in lungs with nonocclusive PE. Lung PBV is required to evaluate pulmonary blood flow.; 学位の種類: 博士（医学）. 報告番号: 甲第3970号. 学位記番号: 新大院博（医）甲第616号. 学位授与年月日: 平成27年3月23日; European Journal of Radiology. 2014, 83(12), 2260-2267.; 新大院博（医）甲第616号; 元資料の権利情報 : Copyright (C) 2014 Elsevier
• DOI: info:doi/10.1016/j.ejrad.2014.08.015; https://doi.org/info:doi/10.1016/j.ejrad.2014.08.015
• Persistent ID (NDL): info:ndljp/pid/9425133; https://dl.ndl.go.jp/pid/9425133
• Collection: 障害者向け資料
• Collection (Materials For Handicapped People:1): テキストデータ
• Collection (particular): 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文; https://dl.ndl.go.jp/collections/A00014
• Acquisition Basis: 博士論文（自動収集）
• Date Accepted (W3CDTF): 2015-07-01T13:17:09+09:00
• Date Created (W3CDTF): 2019-08-05
• Format (IMT): application/pdf
• Access Restrictions: 国立国会図書館内限定公開
• Service for the Digitized Contents Transmission Service: 図書館・個人送信対象外
• Availability of remote photoduplication service: 可
• Periodical Title (URI): http://hdl.handle.net/10191/32254
• Data Provider (Database): 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp