X-ray Source and Other Factors

Figure 1. Digital Panoramic Unit Control Panel.
Digital Panoramic Unit Control Panel
Source: 2009 Proline Panoramic XC, Planmeca

Intraoral x-ray units have a round or rectangular x-ray collimator with the projected beam being slightly larger than the intraoral receptor. In comparison, panoramic x-ray units have a narrow vertical slit aperture. With intraoral x-ray units, the vertical and horizontal angle of the PID (position indicating device) is adjusted for each projection and centered over the image receptor. The panoramic x-ray tubehead is fixed at a negative angle (approximately -10°) and rotates behind the patient’s head during the exposure cycle.

Figure 2. Digital Panoramic X-ray Unit.
Digital Panoramic X-ray Unit
Source: 2009 Proline Panoramic XC, Planmeca
Figure 3. Intraoral X-ray Unit.
Intraoral X-ray Unit
Source: 2002 Heliodent DS, Sirona
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