Abstract: In one embodiment, an apparatus for generating attitude data corresponding to B-scan imaging data generated by an ultrasound probe. The apparatus includes one or more magnetic field sensors generating, based on measurements of the earth's magnetic field, magnetic field data for the probe, which is used to determine the orientation of the probe in a plane. The apparatus preferably also includes one or more accelerometers for determining tilt orientation and position. The apparatus further includes an interface providing, based on the magnetic field data, output data corresponding to the imaging data. The apparatus can be integrated into a probe or can be an attachment to retrofit an existing probe.

Abstract: A word processor system comprising a typewriter, a data storage unit, a tab stop register for storing signals representative of tab stops set on the typewriter and means for controlling the tab stop register to keep it aligned with the typewriter carrier during the course of typing including backspacing, carrier return and tabbing actions. Additional means responsive to tab command and tab stop signals is provided for recording a tab action in the data storage unit as a succession of encoded space signals equal to the number of typing positions to the next tab stop from the carrier position at the instant of the tab command.