Development of a mobile magnetic resonance imaging system for outdoor tree measurements
Development of a mobile magnetic resonance imaging system for outdoor tree measurements
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DOI：
10.1063/1.3589854
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发表时间：
2011-05-01
影响因子：
1.6
通讯作者：
Sekozawa, Yoshihiko
中科院分区：
文献类型：
--
作者：
Kimura, Takeshi;Geya, Yuto;Sekozawa, Yoshihiko
通过结合一个0.3 T的带有灵活旋转和动机构的永磁体、一个带有局部电磁屏蔽的探头、几个电气单元、一个移动升降机和一个电动马车，开发了一个用于室外树木测量的移动磁共振成像（MRI）系统。获取梨树正常和病枝的二维横切面图像，测量T(1)、T(2)、质子密度和表观扩散常数（ADC）。ADC图明显区分病变和正常分支。全天对ADC图的测量表明，正常支路的微观水流随太阳辐射成比例地变化。因此，我们得出结论，我们的移动MRI系统是研究室外环境下植物的有力工具。(C) 2011年美国物理研究所。(doi: 10.1063/1.3589854)
By combining a 0.3 T permanent magnet with flexible rotation and translation mechanism, a probe with a local electromagnetic shielding, several electrical units, a mobile lift, and an electric wagon, a mobile magnetic resonance imaging (MRI) system was developed for outdoor tree measurements. 2D cross-sectional images of normal and diseased branches of a pear tree were acquired for measurements of T(1), T(2), proton density, and apparent diffusion constant (ADC). The ADC map clearly differentiated diseased from normal branches. A whole-day measurement of the ADC map demonstrated that microscopic water flow in the normal branch changed proportionally with solar radiation. Therefore, we have concluded that our mobile MRI system is a powerful tool for studies of plants in outdoor environments. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3589854]