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latitude |
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latitude Etymology: L, latitudio, breadth the ability of an x-ray imaging system to produce acceptable images over a range of exposures. If a system has wide latitude, it is possible to image parts of the body that vary in thickness or density with only one exposure. A system of lesser latitude would require a lower exposure over the thin section and a greater exposure where the absorption was greater. latitude (lat´itood), n the range between the minimum and maximum film exposures to radiation that yields images of structures of which photographic density differences are discernible under normal viewing conditions. Latitude mainly varies directly with kilovoltage and inversely with contrast. See also contrast. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The NSO studies also show that the next solar cycle, which should produce a peak number of sunspots just after the turnof the century, began in 1990 at a lattitude of 70 degrees, overlapping the current solar cycle. Dell, PowerEdge, Lattitude and OptiPlex are trademarks of Dell Computer Corporation. Credit Suisse First Boston Technology Group analyst Paul Weinstein initiated coverage today of Lattitude Communications (LATD), a pioneer in customer-premised, real-time conferencing systems, with a Strong Buy rating and $20 price target, or 60% above current levels. |
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