III-2.
Beam-on Controls and Indicators ------ 38
III-3.
Minimum Source-Skin Distance:
Intraoral Unit
----------------------- 38
III-4.
Source to Image Receptor Distance:
Cephalometric Unit
------------------- 39
III-5.
Radiation Beam Restrictors ----------- 39
III-5-A.
Intraoral System
------------------- 39
III-5-B.
Panoramic System
------------------- 40
III-5-C.
Cephalometric System --------------- 40
III-5-D.
Labeling of Cones or Apertures ----- 40
III-6.
HVL Measurement
---------------------- 41
III-7.
Patient Exposure
--------------------- 41
III-8.
Multiple Tube Configuration ---------- 43
III-9.
Mechanical Support
------------------- 43
III-10. Shielding Devices -------------------- 44
Dental Radiographic Installation Checklist --- 45
Part IV. Measurement of Area Radiation Levels
IV-l.
Introduction
------------------------- 48
IV-2.
Leakage Radiation
-------------------- 48
IV-3.
In-room Scattered Radiation
Measurement
-------------------------- 50
IV-4.
Protective Barrier/Shielding
Assessment
--------------------------- 50
IV-S.
Instrumentation ---------------------- 51
Area Radiation Level Checklist --------------- 53
References
------------------------------------------ 54
iii
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