| http://www.w3.org/ns/prov#value | - FIG. 23B is a top plan view of a sensing unit for use in the sensor assembly of FIG. 23A. FIG. 24 is a schematic diagram of a preamplifier for use with the sensor assembly of FIG. 23A. FIG. 25 is a graph of illustrative tumor motion ellipses from experimental phantom based studies of the system.
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