Radiology The dental x-ray machine Graded A+
2025/2025
you have taken a radiograph of a patient with a large skeletal build and the images does
not show the bone traberculation well and appears to be underpenetrated, what can you
do? - increase the kVp
in taking the radiograph you did not center the beam on the film in the patient's mouth,
the resulting fill will show what? - collimator cutoff
the dental x-ray machine in your office operates at 90kVp and thus is required to have
the total filtration of what? - 2.5mm of aluminum
the radiation inspector comes to your office and tells you that your x-ray beam has a
HVL of 1.00mm of aluminum, how will you react? - be concerned because of the
unnecessary secondary radiation to your patients
the x-ray beam from a conventional dental machine is? - a pulsating divergent beam
using a 16 inch focal-film distance, the diameter of the beam measured at the patient's
face should be no larger than what? - 2.75 inches
for x-ray timers calibrated in impulses, how many impulses are there in a second? - 60
impulses
the intensity of the beam is affected by what? - kV peak
milliampere
exposure time
focal-film distance
all of the above
how many times per second is the polarity reversed in a dental x-ray machine operating
on an alternating current? - 60 times per second
the high-voltage circuit in the dental x-ray machine requires voltage in the range of 65k
to 100k which is achieved by the use of what in the machine - step up transformer
which of the following materials is most resistant to x-radiation? - lead
true or false?
milliampererage determines the speed of the electrons? - true
true or false?
the dental x-ray tube is self-rectified? - true
true or false?
2025/2025
you have taken a radiograph of a patient with a large skeletal build and the images does
not show the bone traberculation well and appears to be underpenetrated, what can you
do? - increase the kVp
in taking the radiograph you did not center the beam on the film in the patient's mouth,
the resulting fill will show what? - collimator cutoff
the dental x-ray machine in your office operates at 90kVp and thus is required to have
the total filtration of what? - 2.5mm of aluminum
the radiation inspector comes to your office and tells you that your x-ray beam has a
HVL of 1.00mm of aluminum, how will you react? - be concerned because of the
unnecessary secondary radiation to your patients
the x-ray beam from a conventional dental machine is? - a pulsating divergent beam
using a 16 inch focal-film distance, the diameter of the beam measured at the patient's
face should be no larger than what? - 2.75 inches
for x-ray timers calibrated in impulses, how many impulses are there in a second? - 60
impulses
the intensity of the beam is affected by what? - kV peak
milliampere
exposure time
focal-film distance
all of the above
how many times per second is the polarity reversed in a dental x-ray machine operating
on an alternating current? - 60 times per second
the high-voltage circuit in the dental x-ray machine requires voltage in the range of 65k
to 100k which is achieved by the use of what in the machine - step up transformer
which of the following materials is most resistant to x-radiation? - lead
true or false?
milliampererage determines the speed of the electrons? - true
true or false?
the dental x-ray tube is self-rectified? - true
true or false?
