Appeal No. 1997-2245 Page 9
Application No. 08/402,872
registered consecutively at different instants do not
necessarily represent the field. As a result, only during
epochs without significant reorientations of the marker can
consistent data sets be provided, i.e., location of the marker
could only be provided when the marker was at rest during the
five seconds of recording (page 193, col. 1and 2).
In Macri, a magnetic sphere was ingested and measurements
of transit time were performed with an RF SQUID. Progression
of the marker along the bowel was determined by measuring the
magnetic field normal to the horizontal plane over the
subject's abdomen. Contour maps were determined at points of a
rectangular grid normalized to the patient's dimensions.
Anatomical data was then obtained using magnetic resonance
images. From these teachings, we find that none of Mishin,
Weitschies, Macri teach or suggest using a compass for
determining directional movement of the marker in the patient.
Leibing is directed toward the use of a compass for
locating a magnet 19, that is concealed in a fixed position in
the wall or floor of a building. Leibing is not related to
using a compass for determining directional movement of
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