ACOSTA RODOLFO HECTOR
Congresos y reuniones científicas
Título:
Experimental setups in gas NMR
Autor/es:
L. AGULLES-PEDRÓS; P.P. ZÄNKER; R. H. ACOSTA; J. SCHMIEDESKAMP; H.W. SPIESS
Lugar:
Aachen, Alemania
Reunión:
Congreso; 9th International Conference of Magnetic Resonance Microscopy; 2007
Resumen:
The use of MRI as diagnostic tool is increasingly employing functional
contrast agents to study or contrast entire mechanisms. Contrast agents in MRI can
be classified in two categories. One type of contrast agents alters the NMR signal of
the protons in its surrounding, e.g. lowers the T1 relaxation time. The other type
enhances the NMR signal of specific nuclei. For hyperpolarized gases the NMR
signal is improved several orders of magnitude. The most interesting question in
spatially resolved experiments is of course the achievable resolution and contrast by
controlling the diffusivity of the gas. However, gases have a high diffusivity which
strongly influences the NMR signal strength, hence the resolution and appearance of
the images.
contrast agents to study or contrast entire mechanisms. Contrast agents in MRI can
be classified in two categories. One type of contrast agents alters the NMR signal of
the protons in its surrounding, e.g. lowers the T1 relaxation time. The other type
enhances the NMR signal of specific nuclei. For hyperpolarized gases the NMR
signal is improved several orders of magnitude. The most interesting question in
spatially resolved experiments is of course the achievable resolution and contrast by
controlling the diffusivity of the gas. However, gases have a high diffusivity which
strongly influences the NMR signal strength, hence the resolution and appearance of
the images.
