Presumptive diagnosis of dwarfed Japanese pear by using a mobile magnetic resonance imaging system

利用移动磁共振成像系统对矮化日本梨进行推定诊断

• 批准号: 23658024
• 负责人: GEMMA Hiroshi
• 金额: $ 2.5万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-23658024/
• 关键词: ナシ; 萎縮症; MRI; 非破壊計測; 生体情報; ニホンナシ; 水分生理; 水ポテンシャル; 樹液流動; 非破壊検査; 果樹

This study was carried out to focus upon the water relation of branches of Japanese pear with the dwarfed symptom by using the novel mobile MRI (magnetic resonance imaging) system incorporated with the measurement of sap flow, water potential, root activity and so forth. As a marker of MRI, T1, T2, and proton density in the cross sections of the sound and diseased branches, show clearly the high density of mobile water protons around the xylem located close to the external surface ofthe branches. In the ADC maps, the diseased branch has no definite high ADC area while the sound branch clearly shows. This difference clearly shows that the water transport function is degraded or destroyed in the diseased branch. A diurnal change of ADC in the branch corresponds clearly the water transport in the pear tree branch which shown in the real sap flow pattern in a whole day. The sap flow shows remarkably lower value in the diseased branch from sprouting until leafing stage than sound branch, but comparable value over leafing stage. From these results, a mobile MRI system will be an available tool of the presumptive diagnosis for dwarf Japanese pear using non destructive measurement.

这项研究的重点是通过使用新型的移动MRI（磁共振成像）系统与SAP流量，水位潜能，根活动等结合的新型移动MRI（磁共振成像）系统，将其与矮症状的分支相关。作为MRI，T1，T2和质子密度在声音和患病分支的交叉部分中的标记，清楚地显示了位于分支外表面附近的木质部周围的高密度移动水质子。在ADC地图中，患病的分支没有明确的高ADC区域，而声音分支则清楚地显示。这种差异清楚地表明，在患病的分支中，水运输功能被降解或破坏。该分支中ADC的昼夜变化清楚地对应了梨树分支中的水传输，该分支在整天的真实SAP流动模式中显示。从发芽到叶片阶段，SAP流量在患病分支中的值明显低于声音分支，但在叶阶段的值可比值。从这些结果中，移动MRI系统将是使用非破坏性测量的矮人日本梨的推定诊断的可用工具。

项目成果

Development of a mobile magnetic resonance imaging system for outdoor tree measurements

• DOI: 10.1063/1.3589854
• 发表时间: 2011-05-01
• 期刊: REVIEW OF SCIENTIFIC INSTRUMENTS
• 影响因子: 1.6
• 作者: Kimura, Takeshi;Geya, Yuto;Sekozawa, Yoshihiko
• 通讯作者: Sekozawa, Yoshihiko

小型モバイルMRIによるニホンナシ萎縮症の早期診断

使用小型移动 MRI 早期诊断日本梨萎缩

• 发表时间: 2012
• 作者: Kimura,T.;Geya,Y.;Terada,Y.;Kose,K.;Haishi,T.,Gemma,H.and Sekozawa;Y.;後藤賢子・神田啓臣・栗原正人・坂本政臣・村山秀樹;弦間 洋・坂田麻衣・木村武史・瀬古澤由彦・菅谷純子・巨瀬勝美
• 通讯作者: 弦間 洋・坂田麻衣・木村武史・瀬古澤由彦・菅谷純子・巨瀬勝美