Name: Score:
91 Multiple choice questions
Term 1 of 91
Low contrast has _____ shades of gray and is a _____ scale
voltage
Many
long
6 feet
90-135
Term 2 of 91
Which factor(s) contribute(s) to radiation injury?
total dose
dose rate
cell sensitivity
age
all of the above
Term 3 of 91
_____ kV results in long scale (low contrast)
True
350 mSv
high
6 feet
,Term 4 of 91
Long term effect have ____ amounts of radiation absorbed in a _____ period of time.
b. collimator
large
short
small
long
e. roentgen
Term 5 of 91
A single intraoral image using a digital sensor results in an effective exposure dose of:
0.002 mSv
0.020 mSv
0.200 mSv
2.000 mSv
20.00 mSv
Term 6 of 91
Every patient should be evaluated individually prior to prescribing dental images.
True or False
True
False
,Term 7 of 91
Which conversion is correct?
1 R = 2.58 × 10−4 C/kg
1 rad = 0.1 Gy
1 rem = 0.1 Sv
1 Gy = 10 rad
1 Sv = 10 rem
Term 8 of 91
The 8 inch PID is more effective than the 16 inch PID in reducing radiation exposure of the patient.
True or False
True
False
Term 9 of 91
The half-value layer is the amount of:
lead that restricts the diameter of the beam by half
copper needed to cool the anode
aluminum needed to reduce scatter radiation by half
aluminum needed to reduce x-ray beam intensity by half
, Term 10 of 91
If the target-receptor distance is doubled, the resultant beam will be:
four times as intense
twice as intense
half as intense
one-fourth as intense
Term 11 of 91
Which position-indicating device is most effective in reducing patient exposure?
Conical
rectangular
circular
all are equally effective in reducing patient exposure
Term 12 of 91
Identify the milliamperage range used for current dental x-ray machines:
1 to 5 mA
6 to 8 mA
9 to 15 mA
greater than 15 mA
91 Multiple choice questions
Term 1 of 91
Low contrast has _____ shades of gray and is a _____ scale
voltage
Many
long
6 feet
90-135
Term 2 of 91
Which factor(s) contribute(s) to radiation injury?
total dose
dose rate
cell sensitivity
age
all of the above
Term 3 of 91
_____ kV results in long scale (low contrast)
True
350 mSv
high
6 feet
,Term 4 of 91
Long term effect have ____ amounts of radiation absorbed in a _____ period of time.
b. collimator
large
short
small
long
e. roentgen
Term 5 of 91
A single intraoral image using a digital sensor results in an effective exposure dose of:
0.002 mSv
0.020 mSv
0.200 mSv
2.000 mSv
20.00 mSv
Term 6 of 91
Every patient should be evaluated individually prior to prescribing dental images.
True or False
True
False
,Term 7 of 91
Which conversion is correct?
1 R = 2.58 × 10−4 C/kg
1 rad = 0.1 Gy
1 rem = 0.1 Sv
1 Gy = 10 rad
1 Sv = 10 rem
Term 8 of 91
The 8 inch PID is more effective than the 16 inch PID in reducing radiation exposure of the patient.
True or False
True
False
Term 9 of 91
The half-value layer is the amount of:
lead that restricts the diameter of the beam by half
copper needed to cool the anode
aluminum needed to reduce scatter radiation by half
aluminum needed to reduce x-ray beam intensity by half
, Term 10 of 91
If the target-receptor distance is doubled, the resultant beam will be:
four times as intense
twice as intense
half as intense
one-fourth as intense
Term 11 of 91
Which position-indicating device is most effective in reducing patient exposure?
Conical
rectangular
circular
all are equally effective in reducing patient exposure
Term 12 of 91
Identify the milliamperage range used for current dental x-ray machines:
1 to 5 mA
6 to 8 mA
9 to 15 mA
greater than 15 mA
