『徳島大学 教育・研究者情報データベース (EDB)』---[学外] /
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登録内容 (EID=314344)

EID=314344EID:314344, Map:0, LastModified:2017年8月17日(木) 17:59:43, Operator:[林 裕晃], Avail:TRUE, Censor:0, Owner:[金澤 裕樹], Read:継承, Write:継承, Delete:継承.
種別 (必須): 国際会議 [継承]
言語 (必須): 英語 [継承]
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審査 (推奨): Peer Review [継承]
カテゴリ (推奨): 研究 [継承]
共著種別 (推奨): 国内共著 (徳島大学内研究者と国内(学外)研究者との共同研究 (国外研究者を含まない)) [継承]
学究種別 (推奨): 修士課程学生による研究報告 [継承]
組織 (推奨):
著者 (必須): 1.松元 友暉 ([徳島大学.大学院医歯薬学研究部.医学域.先端臨床医学教育研究プロジェクト]/[徳島大学.大学院医歯薬学研究部.医学域.医科学部門.内科系.放射線医学])
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[継承]
2.金澤 裕樹 ([徳島大学.大学院医歯薬学研究部.保健学域.保健科学部門.放射線科学系.医用画像情報科学]/徳島大学大学院医歯薬学研究部医用画像情報科学分野)
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[継承]
3. (英) Ikemitsu Nattsuki (日) (読)
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[継承]
4. (英) Sasaki Toshiaki (日) (読)
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[継承]
5.林 裕晃
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[継承]
6. (英) Miyosh Mitsuharu (日) (読)
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[継承]
7.原田 雅史 ([徳島大学.大学院医歯薬学研究部.医学域.医科学部門.内科系.放射線医学])
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[継承]
8.大塚 秀樹 ([徳島大学.大学院医歯薬学研究部.保健学域.保健科学部門.放射線科学系.画像医学・核医学]/[徳島大学.医学部.保健学科.放射線技術科学専攻.診療放射線技術学講座])
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[継承]
題名 (必須): (英) Proposal of an appropriate echo time-input function for quantitative susceptibility mapping.  (日)    [継承]
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要約 (任意): (英) Purpose To improve the quantitative assessment for both diamagnetic and paramagnetic materials, we developed a quantitative susceptibility mapping (QSM) method using an appropriate echo time (TE)-input function. Methods On 3.0 T MR system, we performed a phantom experiment using a multi-echo spoiled gradient-echo (12 echos; delta TE = 4.4 ms). The phantom consisted of gadopentetate dimeglumine (Gd-DTPA) and hydroxyapatite samples, which were made using three different concentrations of each material. After a multiple TE dataset was acquired, T2* values were calculated from the dataset. When a field map estimation was computed, the appropriate T2* value was used as TE-input function. Next, phase unwrapping and background removal were performed. Finally, the reconstruction of QSM was performed. Moreover, we compared susceptibility values derived from TE-input function and conventional methods. Results The mean T2* values of each Gd-DTPA and hydroxyapatite sample were 365 ± 74, 194 ± 9, 86 ± 3, 24 ± 2, 14 ± 1, and 11 ± 1 ms, respectively. Compared with the conventional method, the proposed TE-input function method indicated good positive linearity for the relationship between the Gd-DTPA concentration and susceptibility (slope = 0.26 ppm/mmol/L, R2 = 0.97, P = 0.11). Additionally, the proposed TE-input function method indicated good negative linearity for the relationship between the concentration and hydroxyapatite susceptibility (slope = -0.0019 ppm/mg/mL, R2 = 1.00, P = 0.02). Conclusions QSM with the TE-input function makes it possible to evaluate simultaneously diamagnetic and paramagnetic materials. e.g. Gd-DTPA and hydroxyapatite.  (日)    [継承]
キーワード (推奨): 1. (英) quantitative susceptibility mapping (QSM); field map estimation; echo time; T2* mapping. (日) (読) [継承]
発行所 (推奨):
誌名 (必須): (英) International Conference On Medical Physics (ICMP) 2016 (日) (読)
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都市 (必須): バンコク (Bangkok/[タイ王国]) [継承]
年月日 (必須): 西暦 2016年 12月 初日 (平成 28年 12月 初日) [継承]
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標準的な表示

和文冊子 ● Yuki Matsumoto, Yuki Kanazawa, Nattsuki Ikemitsu, Toshiaki Sasaki, Hiroaki Hayashi, Mitsuharu Miyosh, Masafumi Harada and Hideki Otsuka : Proposal of an appropriate echo time-input function for quantitative susceptibility mapping., International Conference On Medical Physics (ICMP) 2016, (巻), (号), (頁), Bangkok, Dec. 2016.
欧文冊子 ● Yuki Matsumoto, Yuki Kanazawa, Nattsuki Ikemitsu, Toshiaki Sasaki, Hiroaki Hayashi, Mitsuharu Miyosh, Masafumi Harada and Hideki Otsuka : Proposal of an appropriate echo time-input function for quantitative susceptibility mapping., International Conference On Medical Physics (ICMP) 2016, (巻), (号), (頁), Bangkok, Dec. 2016.

関連情報

Number of session users = 4, LA = 0.48, Max(EID) = 383396, Max(EOID) = 1024788.