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

Takeshi Kimura, Yuto Geya, Yasuhiko Terada, Katsumi Kose, Tomoyuki Haishi, Hiroshi Gemma, Yoshihiko Sekozawa
2011 Review of Scientific Instruments  
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
more » ... ed 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.
doi:10.1063/1.3589854 pmid:21639504 fatcat:svvvod7oszgm7n65t4r5tln5yq