1 It is often necessary to do both CT and PET scans to evaluate cancer. 2  Help a doctor choose the best treatment for cancer or to see how well treatment is working. 3  PET scans may also be done to see whether surgery can be done to remove a tumor.
The 2016 Road Atlas. Weâve had plenty of time to hone our craft of compiling accurate, detailed maps and travel information into the ultimate road trip accessoryâ-something thatâs useful (and easy to use), current, beautiful, and compact.No wonder generations of savvy travelers have put our Road Atlas atop their packing lists! Learn Moreâº.eâve had plenty of time to hone our craft of compiling accurate, detailed maps and travel information into the ultimate road trip accessoryâ-something thatâs useful (and easy to use), current, beautiful, and compact. No wonder generations of savvy travelers have put our Road Atlas atop their packing lists! Learn Moreâº.
Maps in this sort of atlas usually show the lines of latitude and longitude to help readers pinpoint locations. Further aides to help the reader orient him-or herself are a compass rose to show north, and an indication of the scale used, for example 1â = 1 mile (2.54 cm = 1.61 km).