The operator should stand at a distance of _______ while taking X-ray.
Correct Answer: 6 feet
Description: Means for Reducing X-Ray Exposure:
Use selection criteria to assist in determining type and frequency of radiographic examinations.
Use E/F-speed film or digital sensors.
Use holders to support film or digital sensors intraorally.
Make exposures with 60 to 70 kVp.
Replace short pointed aiming tubes with open-ended aiming cylinders.
Use rectangular collimation for periapical and bitewing images.
Use thyroid collars.
Stand at least 6 feet (2 m) away from patient and away from the X-ray machine (preferably out of X-ray room) when making exposure.
With film, use time-temperature film processing rather than "sight" processing, or use an automatic processor.
Use rare-earth screens for panoramic and cephalometric film imaging or use digital systems.
Reduce cone-beam CT beam field of view to region of interest.
Reference: White and Pharoah's Oral Radiology Principles and Interpretation 7th edition page no 33
Category:
Radiology
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