2011
DOI: 10.1016/j.jmr.2011.09.001
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High pressure magnetic resonance imaging with metallic vessels

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Cited by 20 publications
(9 citation statements)
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“…In dem schwachen Feld von 0.25 T des Prototyps eines kompakten Tomographen, mit dem die Bilder in Abbildung b gemessen wurden, sind diese Artefakte verschwindend klein, sodass der passende Stent anhand von Bildern aus der Niederfeld‐MRT gewählt werden kann. Aus dem gleichen Grund erwies sich die Niederfeld‐MRT als geeignet, die Flüssigkeitsverdrängung in Bohrkernen unter erhöhtem Druck in Metallgefäßen zu untersuchen . Solche Laboruntersuchungen sind zur Optimierung von Prozessen zur Gewinnung von Öl aus Gesteinsformationen gefragt.…”
Section: Fourier‐nmrunclassified
“…In dem schwachen Feld von 0.25 T des Prototyps eines kompakten Tomographen, mit dem die Bilder in Abbildung b gemessen wurden, sind diese Artefakte verschwindend klein, sodass der passende Stent anhand von Bildern aus der Niederfeld‐MRT gewählt werden kann. Aus dem gleichen Grund erwies sich die Niederfeld‐MRT als geeignet, die Flüssigkeitsverdrängung in Bohrkernen unter erhöhtem Druck in Metallgefäßen zu untersuchen . Solche Laboruntersuchungen sind zur Optimierung von Prozessen zur Gewinnung von Öl aus Gesteinsformationen gefragt.…”
Section: Fourier‐nmrunclassified
“…NMR imaging is particularly valuable in visualizing the flooding of cores by displacing one fluid with another [180][181][182][183][184][185][186] and to quantify local fluid concentrations and matrix properties [187]. Dedicated overburden equipment has been developed to study samples under the elevated pressure and temperature conditions prevalent at the recovery depths of oil wells [138,188]. Other geophysical MRI studies address the moisture balance in upper soil layers by depth profiling with a stray-field sensor [189] and studies of riverbed dynamics [190].…”
Section: Imagingmentioning
confidence: 99%
“…The fluid channel is located between the Teflon insert and the copper shield, with an inner and outer radius r 0 ¼ 0.25 cm and r 1 ¼ 0.5 cm, respectively. With a 4 cm chamber length, the total fluid volume is 2.36 cm 3 . The probe is connected to an electronic tuning circuit to ensure frequency tuning and 50-ohm impedance matching at 42.58 MHz, as shown in Figure 1 Author to whom correspondence should be addressed.…”
Section: Sensor Description and Theorymentioning
confidence: 99%
“…For PFG-NMR measurements, additional magnetic field coils and the associated electronics are needed to produce magnetic field gradients in order to encode spatial information and to measure diffusion. [1][2][3] This hardware adds complexity and thus constrains the range of possible applications. For example, it is difficult to perform NMR under extreme conditions, such as high temperatures (up to 200 C) and pressures (30,000 psi) and with limited space for instrumentation in geological exploration.…”
Section: Introductionmentioning
confidence: 99%