Chapter 6 Panoramic Radiography: Clinical Technique
BASIC CONCEPTS
The panoramic machines illustrated in this and other chapters are the Morita Veraviewepocs in a film-based version and the Planmeca ProMax Pan-Ceph factory digital panoramic machine. Older film-based panoramic machine designs can be converted to digital in two ways: (1) by substituting the film and fluorescent screen and chemical film development for the PSP memory plates and laser scanner; or (2) by substituting the cassette assembly for a CCD sensor. In either case, software and a computer will be needed. The factory-assembled digital panoramic machines come with the CCD sensor and appropriate software; however, a computer may not always be included. Digital panoramic machines have menus of functions and settings that can be selected on the machine; however, the machine software must also be opened in the computer, patient data entered, and other menus selected before an exposure can be made. All machines (film-based machines, digitally converted machines, and factory digital machines) have the same type of exposure switch that must be continually depressed throughout the exposure; releasing the pressure on the exposure button will abort the exposure cycle.