Visualization of anisotropic pulsations in extraembryonic compartments of incubated quail eggs by NMR microimaging.
1996 (English)In: Magnetic Resonance Imaging, ISSN 0730-725X, Vol. 14, no 9, 1079-84 p.Article in journal (Refereed) Published
Multi-plane tagging time-of-flight and bipolar gradient phase-encoding and amplitude-weighting NMR microimaging techniques have been employed to study transport in extraembryonic compartments of fertilized quail eggs during the first seven days of incubation. After the fourth day coherent and incoherent motions became visible in certain regions, in particular in the upper part of the albumen. Coherent motions as visualized by deformations of multiplane tagging grids were specified by local velocities less than 1 mm/s at most. On the other hand, incoherent motions led to much more pronounced phenomena. The multiplane tagging grid completely faded in a region comprising the upper third of the albumen after 4.5 incubation days. Images weighted by signal attenuation owing to incoherent displacements indicate motions in the same region. The fact that a reproducible localization of the motions is only possible when signals from different transients are averaged indicates that the incoherence at least partly is temporal in nature. The signal intensity of a volume selected in the incoherent-motion region consequently fluctuates with time. The Fourier analysis of these fluctuations revealed a distinct pulsation with a frequency of 0.4 Hz.
Place, publisher, year, edition, pages
1996. Vol. 14, no 9, 1079-84 p.
Medical and Health Sciences
Research subject Physics
IdentifiersURN: urn:nbn:se:uu:diva-109815PubMedID: 9070999OAI: oai:DiVA.org:uu-109815DiVA: diva2:300457