Journal articles: 'MRI NMR'

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Lee, Rowland, and Gerald Brimmer. "5374895 NMR/MRI pulse amplifier." Magnetic Resonance Imaging 13, no. 6 (January 1995): V. http://dx.doi.org/10.1016/0730-725x(95)96638-r.

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Saritas, Emine U., Patrick W. Goodwill, Laura R. Croft, Justin J. Konkle, Kuan Lu, Bo Zheng, and Steven M. Conolly. "Magnetic Particle Imaging (MPI) for NMR and MRI researchers." Journal of Magnetic Resonance 229 (April 2013): 116–26. http://dx.doi.org/10.1016/j.jmr.2012.11.029.

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Goldman, M. "Basic Principles of NMR and MRI." EPJ Web of Conferences 30 (2012): 01001. http://dx.doi.org/10.1051/epjconf/20123001001.

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Oros, Ana-Maria, and N. Jon Shah. "Hyperpolarized xenon in NMR and MRI." Physics in Medicine and Biology 49, no. 20 (September 25, 2004): R105—R153. http://dx.doi.org/10.1088/0031-9155/49/20/r01.

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ROVNER, SOPHIE. "NMR AND MRI SHARE LANDMARK STATUS." Chemical & Engineering News Archive 89, no. 17 (April 25, 2011): 43. http://dx.doi.org/10.1021/cen-v089n017.p043.

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Eliav, U., and G. Navon. "Sodium NMR/MRI for anisotropic systems." NMR in Biomedicine 29, no. 2 (June 24, 2015): 144–52. http://dx.doi.org/10.1002/nbm.3331.

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Serkova, Natalie J., Zachary Van Rheen, Meghan Tobias, Joshua E. Pitzer, J. Erby Wilkinson, and Kathleen A. Stringer. "Utility of magnetic resonance imaging and nuclear magnetic resonance-based metabolomics for quantification of inflammatory lung injury." American Journal of Physiology-Lung Cellular and Molecular Physiology 295, no. 1 (July 2008): L152—L161. http://dx.doi.org/10.1152/ajplung.00515.2007.

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Magnetic resonance imaging (MRI) and metabolic nuclear magnetic resonance (NMR) spectroscopy are clinically available but have had little application in the quantification of experimental lung injury. There is a growing and unfulfilled need for predictive animal models that can improve our understanding of disease pathogenesis and therapeutic intervention. Integration of MRI and NMR could extend the application of experimental data into the clinical setting. This study investigated the ability of MRI and metabolic NMR to detect and quantify inflammation-mediated lung injury. Pulmonary inflammation was induced in male B6C3F1 mice by intratracheal administration of IL-1β and TNF-α under isoflurane anesthesia. Mice underwent MRI at 2, 4, 6, and 24 h after dosing. At 6 and 24 h lungs were harvested for metabolic NMR analysis. Data acquired from IL-1β+TNF-α-treated animals were compared with saline-treated control mice. The hyperintense-to-total lung volume (HTLV) ratio derived from MRI was higher in IL-1β+TNF-α-treated mice compared with control at 2, 4, and 6 h but returned to control levels by 24 h. The ability of MRI to detect pulmonary inflammation was confirmed by the association between HTLV ratio and histological and pathological end points. Principal component analysis of NMR-detectable metabolites also showed a temporal pattern for which energy metabolism-based biomarkers were identified. These data demonstrate that both MRI and metabolic NMR have utility in the detection and quantification of inflammation-mediated lung injury. Integration of these clinically available techniques into experimental models of lung injury could improve the translation of basic science knowledge and information to the clinic.

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Colucci, Lina A., Kristin M. Corapi, Matthew Li, Xavier Vela Parada, Andrew S. Allegretti, Herbert Y. Lin, Dennis A. Ausiello, Matthew S. Rosen, and Michael J. Cima. "Fluid assessment in dialysis patients by point-of-care magnetic relaxometry." Science Translational Medicine 11, no. 502 (July 24, 2019): eaau1749. http://dx.doi.org/10.1126/scitranslmed.aau1749.

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Magnetic resonance imaging (MRI) is a powerful diagnostic tool, but its use is restricted to the scanner suite. Here, we demonstrate that a bedside nuclear magnetic resonance (NMR) sensor can assess fluid status changes in individuals at a fraction of the time and cost compared to MRI. Our study recruited patients with end-stage renal disease (ESRD) who were regularly receiving hemodialysis treatments with intradialytic fluid removal as a model of volume overload and healthy controls as a model of euvolemia. Quantitative T2 measurements of the lower leg of patients with ESRD immediately before and after dialysis were compared to those of euvolemic healthy controls using both a 0.28-T bedside single-voxel NMR sensor and a 1.5-T clinical MRI scanner. In the MRI data, we found that the first sign of fluid overload was an expanded muscle extracellular fluid (ECF) space, a finding undetectable at this stage using physical exam. A decrease in muscle ECF upon fluid removal was similarly detectable with both the bedside sensor and MRI. Bioimpedance measurements performed comparably to the bedside NMR sensor but were generally worse than MRI. These findings suggest that bedside NMR may be a useful method to identify fluid overload early in patients with ESRD and potentially other hypervolemic patient populations.

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Takeda, Y., H. Maeda, K. Ohki, and Y. Yanagisawa. "Review of the temporal stability of the magnetic field for ultra-high field superconducting magnets with a particular focus on superconducting joints between HTS conductors." Superconductor Science and Technology 35, no. 4 (February 25, 2022): 043002. http://dx.doi.org/10.1088/1361-6668/ac5645.

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Abstract Superconducting magnets used in applications such as magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR) require significant temporal magnetic field stability, which can be achieved when the MRI and NMR magnets are operated in the persistent current mode (persistent-mode) using superconducting joints. However, the ultra-high field MRI and NMR magnets are sometimes operated in the driven mode. Herein, we present an analysis of the temporal magnetic field drift and fluctuations observed for MRI and NMR magnets operating in the driven mode and an exploration of effective methods for stabilizing the temporal magnetic field fluctuations. In the last decade, substantial improvements have been achieved in superconducting joints between high-temperature superconductors (HTSs). These superconducting joints enable the development of persistent-mode ultra-high field magnets using HTS coils. Therefore, we herein review the superconducting joint technology for HTS conductors and describe the results of the persistent-mode operation achieved by a medium-field NMR magnet using an HTS coil. Particularly, the cutting-edge progress achieved concerning HTS superconducting joints, including joining methods, superconducting properties, and future prospects, is highlighted along with the issues that need to be addressed.

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WATANABE, Tokuko. "Recent Topics in NMR Imaging and MRI." Magnetic Resonance in Medical Sciences 1, no. 1 (2002): 38–49. http://dx.doi.org/10.2463/mrms.1.38.

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Hirsch, Matthew L., Neal Kalechofsky, Avrum Belzer, Melanie Rosay, and James G. Kempf. "Brute-Force Hyperpolarization for NMR and MRI." Journal of the American Chemical Society 137, no. 26 (June 29, 2015): 8428–34. http://dx.doi.org/10.1021/jacs.5b01252.

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Gao, Shuqiang, Waylon House, and Walter G. Chapman. "NMR/MRI Study of Clathrate Hydrate Mechanisms." Journal of Physical Chemistry B 109, no. 41 (October 2005): 19090–93. http://dx.doi.org/10.1021/jp052071w.

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Johansen, D. H., M. M. Albannay, J. R. Petersen, V. Zhurbenko, and J. H. Ardenkjær-Larsen. "PIN diode driver for NMR and MRI." Journal of Magnetic Resonance 300 (March 2019): 114–19. http://dx.doi.org/10.1016/j.jmr.2019.01.017.

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Nieman, Brian J., Jonathan Bishop, and R. Mark Henkelman. "Gradient hysteresis in MRI and NMR experiments." Journal of Magnetic Resonance 177, no. 2 (December 2005): 336–40. http://dx.doi.org/10.1016/j.jmr.2005.08.012.

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Berthault, Patrick, Gaspard Huber, and Hervé Desvaux. "Biosensing using laser-polarized xenon NMR/MRI." Progress in Nuclear Magnetic Resonance Spectroscopy 55, no. 1 (July 2009): 35–60. http://dx.doi.org/10.1016/j.pnmrs.2008.11.003.

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Chen, Yannan, Hongjing Dong, Jingkun Li, Lanping Guo, and Xiao Wang. "Evaluation of a Nondestructive NMR and MRI Method for Monitoring the Drying Process of Gastrodia elata Blume." Molecules 24, no. 2 (January 10, 2019): 236. http://dx.doi.org/10.3390/molecules24020236.

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Gastrodia elata Blume (G. elata) is a prominent traditional herb and its dry tuber is officially listed in the Chinese Pharmacopoeia. To ensure the quality of dried G. elata, the establishment of a nondestructive and convenient method to monitor the drying process is necessary. In this study, a nondestructive low-field nuclear magnetic resonance (LF-NMR) and magnetic resonance imaging (MRI) method was introduced to monitor the drying process of G. elata. Three water states (bound, immobilized, and free) in G. elata samples were investigated through multiexponential fitting and inversion of the NMR data. The variation and distribution of the three water states during drying were monitored by LF-NMR, and the spatial distribution of water and internal structural changes were analyzed by MRI. Linear analysis of the moisture content, L* (lightness), b* (yellowness), and NMR parameters showed good correlations among them. Furthermore, partial least squares regression (PLSR) model analysis, which takes into account all NMR parameters, also showed good correlations among these parameters. All results showed that LF-NMR was feasible and convenient for monitoring moisture content. Therefore, LF-NMR and MRI could be used to monitor the moisture content nondestructively in the drying process of Chinese traditional herbs.

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Ullah, Ubaid, Safia Bano, and Shoaib Saleem. "Evaluation of Central Nervous System Tuberculomas by Using Modern Diagnostic Techniques." Pakistan Journal of Medical and Health Sciences 16, no. 6 (June 22, 2022): 16–18. http://dx.doi.org/10.53350/pjmhs2216616.

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Aim: To assess central nervous system tuberculomas by using modern MRI techniques such as Diffusion MRI (dMRI), Nuclear magnetic resonance spectroscopy (NMR spectroscopy) and BOLD venographic imaging. Study design: A retrospective study design Study setting: From 5th Feb 2021 to 5th Feb 2022 at the department of Neurology of Ibe-e-Siena Hospital, Multan. Methods: A retrospective study was conducted in the neurology department of Ibe-e-Siena Hospital & Research Institute Multan from 5th February 2021 to 5th February 2022. A total of 100 patients with suspected intracranial tuberculomas were included in the study. Advanced MRI techniques, including Diffusion MRI (dMRI), Nuclear magnetic resonance spectroscopy (NMR spectroscopy) and BOLD venographic imaging and conventional MRI, was performed on the patients. The study was approved by the ethical committee of the hospital, and all the patients provided their written consent for inclusion in the study Results: NMR spectroscopy evaluation showed that N-acetylaspartate /Creatine and N-acetylaspartate /Choline ratios of tuberculomas did not differ significantly from malignant brain lesions (p>0.04). But the malignant brain lesion (2.59) were significantly higher than the Choline/Creatine ratio of tuberculomas(1.29). BOLD venographic imaging evaluation showed no hypointense peripheral ring in malignant brain lesions but showed complete and regular rings in 36 (58.1%) of tuberculomas. Conclusion: Diffusion MRI did not help distinguish tuberculomas from metastasis and gliomas. However, NMR spectroscopy did offer this advantage by evaluating their unique metabolite pattern. BOLD venographic imaging showed the presence of a complete peripheral hypointense ring helping in diagnosing tuberculomas Keywords: Intracranial tuberculomas, Nuclear magnetic resonance spectroscopy, diffusion MRI,

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Banko, B. A., J. P. Milovanovic, and R. M. Maksimovic. "NMR diagnostic vallue inassessing laryngeal tumor." Acta chirurgica Iugoslavica 56, no. 3 (2009): 55–59. http://dx.doi.org/10.2298/aci0903055b.

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Aims: To evaluate diagnostic accuracy of pretreatment surgical magnetic resonance images (MRI) in assessment of patients with tumors of the larynx. Materials and methods: The study included 12 patients, 11 men and 1 women, age 614 years. All patients underwent laryngeal endoscopy and biopsy followed by MRI. The biopsy confirmed that all patient had squamous-cell carcinoma. The MRI images were evaluated for presence in supraglottic, glottic or subglottic region, invasion of submucosal space, cartilage, extension to extralaryngeal tissue, presence of regional lymph nodes in regions I to VII. Imaging data were compared to surgical findings. Results: In 11 patients (92%) the tumor was supraglottic and glotic region and in 1 (8%) subglottic. None of them had tumor only in one region. Paraglottic ivasion was seen in 9 (75%) and preepiglottic in 2 (50%) patients. Paraglottic and preepiglotic invasion in the same time was seen in 3(25%) patients. 7 (58%) patients had normal vocal cord mobility, 3 (25%) mobility was unilateral and 2 (17%) had no vocal cord mobility. Cartilage invasion has not been seen in present study. All patients had billateral limphadenopathy region II-IV. Extension to extralaryngeal tissue was absent. These findings were confirmed on surgery with high diagnostic accuracy. Conclusion: MRI has been shown to be a reliable method for presurgical assessment of patients with tumor of the larynx.

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Zhang, Jin Sheng, Yun Li, Na Wang, and Roger Ruan. "Application of MRI to Monitor the Process of Navel Orange Ripening." Applied Mechanics and Materials 220-223 (November 2012): 1329–34. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.1329.

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Low field nuclear magnetic resonance (NMR) technique was used to evaluate the capacity of NMR spectrometry in characterizing the different behaviors of water protons in navel orange during growth. Carr-Purcell-Meiboom-Gill (CPMG) sequence and mult-exponential regress model were used to calculate the spin-spin relaxation time (T2) of orange samples. Meanwhile, chemical properties (etc. total sugar, acid and solid content) were tested. Statistics analysis shows a correlation between chemical properties of orange and NMR relaxation time during growth, which indicate that interactions between molecules and water protons in orange are involved. Evaluating the behavior of liquid water by NMR shows a new view for better understanding the mechanisms of the macromolecular formation. Changes in NMR relaxation time parameters would be helpful for understanding the mechanism of decay and damage. Therefore, it would be helpful for finding a better food preserving method for the long term storage in the future.

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Kupče, Ēriks, Kaustubh R. Mote, Andrew Webb, Perunthiruthy K. Madhu, and Tim D. W. Claridge. "Multiplexing experiments in NMR and multi-nuclear MRI." Progress in Nuclear Magnetic Resonance Spectroscopy 124-125 (June 2021): 1–56. http://dx.doi.org/10.1016/j.pnmrs.2021.03.001.

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Timms, W. E. "Interference problems and screening in NMR and MRI." Journal of Medical Engineering & Technology 16, no. 2 (January 1992): 69–78. http://dx.doi.org/10.3109/03091909209021963.

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Konzbul, P., and K. Sveda. "Shim coils for NMR and MRI solenoid magnets." Measurement Science and Technology 6, no. 8 (August 1, 1995): 1116–23. http://dx.doi.org/10.1088/0957-0233/6/8/005.

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Granwehr, J., and J. A. Seeley. "Sensitivity quantification of remote detection NMR and MRI." Journal of Magnetic Resonance 179, no. 2 (April 2006): 280–89. http://dx.doi.org/10.1016/j.jmr.2005.12.006.

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Johns, M. L., and K. G. Hollingsworth. "Characterisation of emulsion systems using NMR and MRI." Progress in Nuclear Magnetic Resonance Spectroscopy 50, no. 2-3 (March 2007): 51–70. http://dx.doi.org/10.1016/j.pnmrs.2006.11.001.

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Doty, F. David, George Entzminger, and Cory D. Hauck. "Error-Tolerant RF Litz Coils for NMR/MRI." Journal of Magnetic Resonance 140, no. 1 (September 1999): 17–31. http://dx.doi.org/10.1006/jmre.1999.1828.

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Mariette, F. "Investigations of food colloids by NMR and MRI." Current Opinion in Colloid & Interface Science 14, no. 3 (June 2009): 203–11. http://dx.doi.org/10.1016/j.cocis.2008.10.006.

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Mantle, Michael D. "NMR and MRI studies of drug delivery systems." Current Opinion in Colloid & Interface Science 18, no. 3 (June 2013): 214–27. http://dx.doi.org/10.1016/j.cocis.2013.03.006.

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Geng, Shaote, Huihui Wang, Xiaoling Wang, Xiaojun Ma, Shan Xiao, Jihui Wang, and Mingqian Tan. "A non-invasive NMR and MRI method to analyze the rehydration of dried sea cucumber." Analytical Methods 7, no. 6 (2015): 2413–19. http://dx.doi.org/10.1039/c4ay03007a.

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NMR and MRI were employed to analyze the water uptake and distribution during rehydration processing of lightly dried sea cucumbers. Good linear correlations were observed between the NMR parameters and texture profile analysis.

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Morikawa, S., T. Inubushi, and K. Kito. "Heterogeneous Metabolic Changes in the Calf Muscle of the Rat during Ischaemia-reperfusion: in Vivo Analysis by ³¹P Nuclear Magnetic Resonance Chemical Shift Imaging and ¹H Magnetic Resonance Imaging." Cardiovascular Surgery 1, no. 4 (August 1993): 337–42. http://dx.doi.org/10.1177/096721099300100405.

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Non-localized and localized 31P nuclear magnetic resonance (NMR) spectra of rat calf muscle during arterial occlusion and after reperfusion were concurrently observed using chemical shift imaging and ‘H magnetic resonance imaging (MRI). During ischaemia. the levels of high-energy phosphates (phosphocreatine and adenosine 5′-triphosphate) were depleted and that of inorganic phosphate was increased. In addition, the signal intensity on 1H MRI was increased. These changes were observed to be relatively homogeneous throughout the calf. In contrast, the changes during reperfusion were heterogeneous. In the central part of the calf, inorganic phosphate disappeared, phosphocreatine was restored immediately on reperfusion and the ‘H signal was decreased. However, in the regions of the tibialis anterior muscle and the superficial part of the gastrocnemius muscle, inorganic phosphate persisted for several hours, phosphocreatine was not restored and the signal intensity on T2-weighted 1H MRI was increased further. The heterogeneous changes detected by 31P NMR spectroscopy and 1H MRI showed close agreement. The susceptibility of different calf muscles to ischaemia and reperfusion seems to depend on their predominant muscle fibre type (i.e. fast-twitch or slow-twitch fibres). Reversible and irreversible ischaemic changes could be non-invasively distinguished by in vivo31P NMR spectroscopy and 1H MRI.

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Ahmad, Sheikh Faisal, Young Cheol Kim, Ick Chang Choi, and Hyun Deok Kim. "Recent Progress in Birdcage RF Coil Technology for MRI System." Diagnostics 10, no. 12 (November 27, 2020): 1017. http://dx.doi.org/10.3390/diagnostics10121017.

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The radio frequency (RF) coil is one of the key components of the magnetic resonance imaging (MRI) system. It has a significant impact on the performance of the nuclear magnetic resonance (NMR) detection. Among numerous practical designs of RF coils for NMR imaging, the birdcage RF coil is the most popular choice from low field to ultra-high field MRI systems. In the transmission mode, it can establish a strong and homogeneous transverse magnetic field B1 for any element at its Larmor frequency. Similarly, in the reception mode, it exhibits extremely high sensitivity for the detection of even faint NMR signals from the volume of interest. Despite the sophisticated 3D structure of the birdcage coil, the developments in the design, analysis, and implementation technologies during the past decade have rendered the development of the birdcage coils quite reasonable. This article provides a detailed review of the recent progress in the birdcage RF coil technology for the MRI system.

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Wang, Yaohui, Qiuliang Wang, Hui Wang, Shunzhong Chen, Xinning Hu, Yang Liu, and Feng Liu. "Actively-shielded ultrahigh field MRI/NMR superconducting magnet design." Superconductor Science and Technology 35, no. 1 (December 8, 2021): 014001. http://dx.doi.org/10.1088/1361-6668/ac370e.

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Abstract Active shielding technology has been widely applied to the superconducting magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR) magnets design, revealing excellent performance on the stray field control. For such a highly homogeneous field superconducting magnet design, an appropriate optimization strategy is essential to guarantee the magnetic field homogeneity in the central region and the expected 5 Gauss line range, especially for the ultrahigh field superconducting magnet. Based on the compensating field optimization method, an actively-shielded whole-body 14 T MRI magnet and an actively-shielded 1.3 GHz NMR magnet were presented, and detailed analyses were conducted to evaluate the feasibility of the designs. The developed magnet design method, coil pattern, wire arrangement, and stress/strain adjustment will be used to guide the corresponding project implementation.

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Morris, P. G. "Sir Peter Mansfield. 9 October 1933—8 February 2017." Biographical Memoirs of Fellows of the Royal Society 70 (February 3, 2021): 313–34. http://dx.doi.org/10.1098/rsbm.2020.0031.

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Peter Mansfield's rise from humble origins to founding father of magnetic resonance imaging (MRI) is an inspirational and remarkable story. His first scientific contributions were in the field of solid state nuclear magnetic resonance (NMR), and it was whilst trying to develop an NMR version of X-ray crystallography that he developed the underpinning methodology for MRI. At that time (the early 1970s) NMR was an analytical tool, ubiquitous in chemistry departments. For most of those working in the field, there was no hint that it could be developed into a diagnostic imaging technique that would reveal internal anatomy in unprecedented detail. Yet that was what happened in the space of just a few years. The first MRI scans were slow, and Peter was driven to speed them up, making physiological and later functional brain imaging studies possible. The technical challenges were many, and eschewed by healthcare equipment providers, but Peter persisted and his brainchild, echo-planar imaging, came to dominate the high speed MRI field. Peter was a gifted physicist and archetypal inventor who devoted his life to the development of a technique that has saved millions of lives. In 2003, he shared the Nobel Prize for Physiology or Medicine, in recognition of his achievement.

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Hiltunen, Sami, Arttu Mankinen, Muhammad Asadullah Javed, Susanna Ahola, Martti Venäläinen, and Ville-Veikko Telkki. "Characterization of the decay process of Scots pine caused by Coniophora puteana using NMR and MRI." Holzforschung 74, no. 11 (November 26, 2020): 1021–32. http://dx.doi.org/10.1515/hf-2019-0246.

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AbstractWood decay is an economically significant process, as it is one of the major causes of wood deterioration in buildings. In this study, the decay process of Scots pine (Pinus sylvestris) samples caused by cellar fungus (Coniophora puteana) was followed by nuclear magnetic resonance (NMR) spectroscopy and magnetic resonance imaging (MRI) methods. Altogether, 30 wood sample pieces were exposed to fungus for 10 weeks. Based on the decrease of the dry mass, the samples were categorized into three classes: decomposed (mass decrease 50–70%), slightly decomposed (10–50%), and nondecomposed (<10%). MRI made it possible to identify the active regions of fungus inside the wood samples based on the signal of free water brought by the fungus and arisen from the decomposition of wood carbohydrates. MRI implies that free water is not only created by the decay process, but fungal hyphae also transports a significant amount of water into the sample. Two-dimensional 1H T1-T2 relaxation correlation NMR measurements provided detailed information about the changes in the microstructure of wood due to fungal decomposition. Overall, this study paves the way for noninvasive NMR and MRI detection of fungal decay at early stages as well as the related structural changes.

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Hennessy, M. J., and E. Kwok. "An emerging technology: Nuclear magnetic resonance microscopy." Proceedings, annual meeting, Electron Microscopy Society of America 46 (1988): 1000–1001. http://dx.doi.org/10.1017/s042482010010706x.

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Much progress in nuclear magnetic resonance microscope has been made in the last few years as a result of improved instrumentation and techniques being made available through basic research in magnetic resonance imaging (MRI) technologies for medicine. Nuclear magnetic resonance (NMR) was first observed in the hydrogen nucleus in water by Bloch, Purcell and Pound over 40 years ago. Today, in medicine, virtually all commercial MRI scans are made of water bound in tissue. This is also true for NMR microscopy, which has focussed mainly on biological applications. The reason water is the favored molecule for NMR is because water is,the most abundant molecule in biology. It is also the most NMR sensitive having the largest nuclear magnetic moment and having reasonable room temperature relaxation times (from 10 ms to 3 sec). The contrast seen in magnetic resonance images is due mostly to distribution of water relaxation times in sample which are extremely sensitive to the local environment.

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Hornung, P. A., and N. Schuff. "Noninvasive Imaging and Spectroscopy--Broad Applications of Magnetic Resonance." Clinical Chemistry 38, no. 9 (September 1, 1992): 1608–12. http://dx.doi.org/10.1093/clinchem/38.9.1608.

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Abstract The present utility of nuclear magnetic resonance (NMR) spectroscopy in chemical analysis and magnetic resonance imaging (MRI) in the clinical environment has made this technology commonplace in the chemical industry, clinical medicine, and academic research. The attributes of nuclear magnetism that make the technique especially powerful in biology are discussed. This paper reviews the uses of NMR and MRI, with an emphasis on spatially resolved applications. These applications include imaging, localized spectroscopy, flow sensing, and diffusion mapping from using magnetic-field gradients. The limits of spatially resolved NMR and imaging will be examined in terms of both scientific principles and engineering practice. Block diagrams of both imaging and spectroscopy apparatus are presented and technical requirements of the critical components are discussed. Developing trends in sensing probes, magnets, and applications are highlighted.

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Wetterling, Friedrich, Kenneth Hun Mok, Ciaran McGoldrick, and Biswajit Basu. "Non-Destructive Investigation of Glass Fiber Reinforced Composites via Magnetic Resonance Imaging." Key Engineering Materials 569-570 (July 2013): 126–31. http://dx.doi.org/10.4028/www.scientific.net/kem.569-570.126.

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Glass fibre reinforced composites (GFRC), used in the manufacture of wind turbine blades, can suffer unpredictable, post-manufacturing, in-situ structural failure. The economic cost of remediation of such blade failures is extremely high, both on land and offshore. We suggest using zero-time-to-echo (ZTE) magnetic resonance imaging (MRI) as a method for characterising glass fibre reinforced composites. Initially, we demonstrate that carbon-13 Nuclear Magnetic Resonance (NMR) spectra acquired at 800MHz provide finger-print like information and that there is sufficient hydrogen-1 NMR signal available to conduct MRI. This work explores the efficacy of using zero timetoecho (ZTE) magnetic resonance imaging (MRI) to detect the rapidly decaying Hydrogen-1 (1H) NMR signal from a representative sample. A 400MHz surface resonator was developed made of a 20mm diameter loop formed with 1.5mm thick silver wire and designed with variable tuning and matching in order to investigate the 1H-MRI signal at 9.4T static magnetic field strength. The thickness of the GFRC was determined from the MRI data to be 3.51±0.28mm while the physical measurement using a caliper device resulted in a measurement of 3.45mm. Hence, a high spatial resolution accuracy is provided by ZTE MRI. Very short T2* (<20μs) of the material led to stronger blurring artefacts for the blade material compared to heat shrink used for insulating the silver wire of the detector. 1H images of the blade material were acquired demonstrating that ZTE is a suitable technique for acquiring image data from glass fibre materials. Work is on-going in studying the relaxation time parameters and chemical frequency shifts for materials with and without structural weaknesses in order to improve the predictive power of the technique. In conclusion, ZTE-MRI can provide useful information about the mechanical properties of glass fibre reinforced composites.

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Aime, Silvio, Dario Livio Longo, Francesca Reineri, and Simonetta Geninatti Crich. "New tools to investigate tumor metabolism by NMR/MRI." Journal of Magnetic Resonance 338 (May 2022): 107198. http://dx.doi.org/10.1016/j.jmr.2022.107198.

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Price, Ronald R., Jerry Allison, Richard J. Massoth, Geoffrey D. Clarke, and Dick J. Drost. "Practical aspects of functional MRI (NMR Task Group #8)." Medical Physics 29, no. 8 (July 29, 2002): 1892–912. http://dx.doi.org/10.1118/1.1494990.

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Kuzmin, Vyacheslav V., and Pierre-Jean Nacher. "Signal feedback applications in low-field NMR and MRI." Journal of Magnetic Resonance 310 (January 2020): 106622. http://dx.doi.org/10.1016/j.jmr.2019.106622.

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Frey, Merideth A., Zachary M. Sethna, Gregory A. Manley, Suvrajit Sengupta, Kurt W. Zilm, J. Patrick Loria, and Sean E. Barrett. "Accelerating multidimensional NMR and MRI experiments using iterated maps." Journal of Magnetic Resonance 237 (December 2013): 100–109. http://dx.doi.org/10.1016/j.jmr.2013.09.005.

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Grebenkov, Denis S. "Diffusion MRI/NMR at high gradients: Challenges and perspectives." Microporous and Mesoporous Materials 269 (October 2018): 79–82. http://dx.doi.org/10.1016/j.micromeso.2017.02.002.

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Erhart, Sarah E., Robert M. McCarrick, Gary A. Lorigan, and Ellen J. Yezierski. "Citrus Quality Control: An NMR/MRI Problem-Based Experiment." Journal of Chemical Education 93, no. 2 (November 16, 2015): 335–39. http://dx.doi.org/10.1021/acs.jchemed.5b00251.

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Pines, Alexander. "“Shining light” on NMR and MRI in porous materials." Magnetic Resonance Imaging 19, no. 3-4 (April 2001): 307–9. http://dx.doi.org/10.1016/s0730-725x(01)00241-7.

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Moule, A. J., M. M. Spence, S. I. Han, J. A. Seeley, K. L. Pierce, S. Saxena, and A. Pines. "Amplification of xenon NMR and MRI by remote detection." Proceedings of the National Academy of Sciences 100, no. 16 (July 22, 2003): 9122–27. http://dx.doi.org/10.1073/pnas.1133497100.

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Ryner, L. N., J. A. Sorenson, and M. A. Thomas. "3D Localized 2D NMR Spectroscopy on an MRI Scanner." Journal of Magnetic Resonance, Series B 107, no. 2 (May 1995): 126–37. http://dx.doi.org/10.1006/jmrb.1995.1068.

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Nöth, U., L. J. E. Jäger, J. Lutz, and A. Haase. "Fast 19F-NMR imaging in vivo using FLASH-MRI." Magnetic Resonance Imaging 12, no. 1 (January 1994): 149–53. http://dx.doi.org/10.1016/0730-725x(94)92362-0.

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Bradac, G. B., W. Sch�rner, A. Bender, and R. Felix. "MRI (NMR) in the diagnosis of brain-stem tumors." Neuroradiology 27, no. 3 (May 1985): 208–13. http://dx.doi.org/10.1007/bf00344489.

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Turyanska, Lyudmila, Fabrizio Moro, Amalia Patanè, James Barr, Walter Köckenberger, Alexander Taylor, Henryk M. Faas, et al. "Developing Mn-doped lead sulfide quantum dots for MRI labels." Journal of Materials Chemistry B 4, no. 42 (2016): 6797–802. http://dx.doi.org/10.1039/c6tb02574a.

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Peng, Qiaoli, Yu Li, Shaowei Bo, Yaping Yuan, Zhigang Yang, Shizhen Chen, Xin Zhou, and Zhong-Xing Jiang. "Paramagnetic nanoemulsions with unified signals for sensitive 19F MRI cell tracking." Chemical Communications 54, no. 47 (2018): 6000–6003. http://dx.doi.org/10.1039/c8cc02938e.

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Totland, C., J. G. Seland, S. Steinkopf, and W. Nerdal. "Analysis of wild and farmed salmon using13C solid-state NMR and MRI directly on fillet tissue." Analytical Methods 9, no. 8 (2017): 1290–96. http://dx.doi.org/10.1039/c6ay03000a.

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Journal articles on the topic 'MRI NMR'

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