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

Kimura, Takeshi; Geya, Yuto; Terada, Yasuhiko; Kose, Katsumi; Haishi, Tomoyuki; Gemma, Hiroshi; Sekozawa, Yoshihiko
May 2011
Review of Scientific Instruments;May2011, Vol. 82 Issue 5, p053704
Academic Journal
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 T1, T2, 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.


Related Articles

  • Basic concepts of advanced MRI techniques. Pagani, Elisabetta; Bizzi, Alberto; Di Salle, Francesco; De Stefano, Nicola; Filippi, Massimo // Neurological Sciences;Oct2008 Supplement 3, Vol. 29, p290 

    An overview is given of magnetic resonance (MR) techniques sensitized to diffusion, flow, magnetization transfer effect, and local field inhomogeneities induced by physiological changes, that can be viewed, in the clinical practice, as advanced because of their challenging implementation and...

  • Imaging of HCC--Current State of the Art. Schraml, Christina; Kaufmann, Sascha; Rempp, Hansjoerg; Syha, Roland; Ketelsen, Dominik; Notohamiprodjo, Mike; Nikolaou, Konstantin // Diagnostics (2075-4418);2015, Vol. 5 Issue 4, p513 

    Early diagnosis of hepatocellular carcinoma (HCC) is crucial for optimizing treatment outcome. Ongoing advances are being made in imaging of HCC regarding detection, grading, staging, and also treatment monitoring. This review gives an overview of the current international guidelines for...

  • Analyzing functional, structural, and anatomical correlation of hemispheric language lateralization in healthy subjects using functional MRI, diffusion tensor imaging, and voxel-based morphometry. James, Jija S.; Kumari, Sheela R.; Sreedharan, Ruma Madhu; Thomas, Bejoy; Radhkrishnan, Ashalatha; Kesavadas, Chandrasekharan // Neurology India;Jan/Feb2015, Vol. 63 Issue 1, p49 

    Context: To evaluate the efficacy of diffusion fiber tractography (DFT) and voxel-based morphometry (VBM) for lateralizing language in comparison with functional magnetic resonance imaging (fMRI) to noninvasively assess hemispheric language lateralization in normal healthy volunteers. Aims: The...

  • Learning and memory: Image storage. Yates, Darran // Nature Reviews Neuroscience;Nov2012, Vol. 13 Issue 11, p739 

    The article offers information on the role of functional magnetic resonance imaging (fMRI) in memorizing two complex images and, after a delay, decide which one of two newly presented images most resembled the original stimuli.

  • Hepatic angiosarcoma: cross-sectional imaging findings in seven patients with emphasis on dynamic contrast-enhanced and diffusion-weighted MRI. Bruegel, Melanie; Muenzel, Daniela; Waldt, Simone; Specht, Katja; Rummeny, Ernst // Abdominal Imaging;Aug2013, Vol. 38 Issue 4, p745 

    Objective: Primary hepatic angiosarcoma is a very rare and aggressive malignancy of vascular origin. We describe cross-sectional imaging findings of this entity with emphasis on dynamic contrast-enhanced (DCE) and diffusion-weighted (DWI) MR imaging. Methods: Seven cases of pathologically...

  • On how high performers keep cool brains in situations of cognitive overload. Susanne M. Jaeggi; Martin Buschkuehl; Alex Etienne; Christoph Ozdoba; Walter J. Perrig; Arto C. Nirkko // Cognitive, Affective & Behavioral Neuroscience;Jun2007, Vol. 7 Issue 2, p75 

    What happens in the brain when we reach or exceed our capacity limits? Are there individual differences for performance at capacity limits? We used functional magnetic resonance imaging (fMRI) to investigate the impact of increases in processing demand on selected cortical areas when...

  • An fMRI study on smooth pursuit and fixation suppression of the optokinetic reflex using similar visual stimulation. Schraa-Tam, Caroline K. L.; Van Der Lugt, Aad; Frens, Maarten A.; Smits, Marion; Van Broekhoven, P. C. A.; Van Der Geest, Josef N. // Experimental Brain Research;Mar2008, Vol. 185 Issue 4, p535 

    This study compares brain activation patterns evoked by smooth pursuit and by fixation suppression of the optokinetic reflex (OKR) using similar retinal stimulation. Functional magnetic resonance imaging (fMRI) was performed during smooth pursuit stimulation in which a moving target was...

  • Two- and three-dimensional mapping of the iron distribution in the apoplastic fluid of plant leaf tissue by means of magnetic resonance imaging. Lambert, Jörg; Lampen, Peter; Von Bohlen, Alex; Hergenröder, Roland // Analytical & Bioanalytical Chemistry;Dec2005, Vol. 384 Issue 1, p231 

    A three-dimensional nuclear magnetic resonance imaging (MRI) technique for non-invasive mapping of iron in the apoplastic fluid of plant compartments was developed. The new technique was applied to a leaf of red stem dogwood ( Cornus stolonifera). The results are compared with MRI measurements...

  • Ganglion cyst of the Hoffa's fat pad of the knee joint. Bagul, Rahul R.; Savaskar, Vivek; Malhotra, Rohit; Patel, Sachin // International Medical Journal of Sifa University;Sep/Oct2015, Vol. 2 Issue 3, p69 

    We report a rare case of ganglion cyst of Hoffa's fat pad of knee joint. These lesions are asymptomatic in most cases and are often misdiagnosed as meniscal or ligamentous lesions of the knee joint. The fi nal diagnosis was done with magnetic resonance imaging (MRI) of the knee joint, and the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics