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M. A. Macrì C. Del Gratta L. Di Donato S. Di Luzio G. L. Romani S. Della Penna A. Pasquarelli 《Il Nuovo Cimento D》1994,16(5):425-432
Summary A preliminary study is here reported on a new potential marker for biomagnetic measurements. The marker consists of superparamagnetic
polymer microspheres which were detected in the presence of external steady magnetic fields by means of an r.f.-SQUID magnetometer.
The particles were prepared in samples differing in the concentration value and immersed in a homogeneous magnetic field of
variable intensity. A simple model was taken into account for the distribution of the microspheres in the samples, so that
the theoretical values were compared to the marker field values measured by the biomagnetic sensor. The overall sensitivity
of the experimental apparatus and the minimum concentration value of the marker were then estimated. 相似文献
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S. Di Luzio S. Comani G. L. Romani M. Basile C. Del Gratta V. Pizzella 《Il Nuovo Cimento D》1989,11(12):1853-1859
Summary A novel method to investigate the gastro-intestinal activity by means of a superconducting instrumentation based on SQUID
sensors developed for biomagnetic measurements is presented. The magnetic field generated by a small marker ingested by the
subject is measured over the abdomen. The localization of the marker,i.e. a magnetic dipole, is carried out by means of a standard algorithm used in biomagnetic studies. In this way it is possible
to noninvasively study the activity of the gastro-intestinal system. This new approach may lead to important clinical applications. 相似文献
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