CONTROL OF SCATTER RADIATION:
UNIT 5 (PHYSICS 2) LATEST 2024 EXAM
QUESTIONS AND CORRECT
ANSWERS|GRADED A+
In the diagnostic energy range, which interaction reduces image contrast the most -
Answer-Compton scatter
When radiographic grids are used which of the following increases - Answer-
radiographic contrats and patient dose
The focal range of a focused grid is most closely related to the - Answer-
convergence line
Which grid requires the greatest patient dose - Answer-16:1
Which grid does not allow angling of the x-ray beam in any direction - Answer-
crossed grid
Which material would be unacceptable for use as interstate material - Answer-
tungsten
An increase in scatter radiation will___ receptor exposure and ____ contrast -
Answer-increases, decreases
Which grid would provide contrast improvement - Answer-12:1
The mirror in the collimator must be at a __ angle if the light is to be projected in
the same position as the x-ray field - Answer-45 degrees
Suppose that a technique of 72 kvp 45mAs with a 8:1 grid produces an excellent
quality radiograph with an optimum receptor exposure. What would happen if the
same technique was used with a 12:1 grid - Answer-the receptor would decrease
and the patient dose would stay the same
, CONTROL OF SCATTER RADIATION:
UNIT 5 (PHYSICS 2) LATEST 2024 EXAM
QUESTIONS AND CORRECT
ANSWERS|GRADED A+
Which grid is the least likely to have grid cutoff when performing mobile
radiography - Answer-8:1
One advantage of a focused grid is that it can be used at any SID without causing
grid cut off - Answer-false
Grid cut off will cause the receptor exposure to decrease even if the proper
exposure technique was used - Answer-true
What happens to the amount of scatter radiation produced as the x-ray field size is
recut with tighter collimation - Answer-scatter is reduced
Describe two differences between x-ray tube filtration and the radiographic grid -
Answer-
Grid: between patient and IR, changes the exit beam coming out the patient and
discriminates based on angle
Filtration: between the tube and patient, affects the primary beam before it interact
with the patient, based on energy.
A 10:1 grid could absorb more scatter than a 10:1 linear grid - Answer-true
Increasing which of the following will increase the amount of scatter reaching the
IR - Answer-
-kvp
-thickness of part
-density of part
-x-ray field size
Air gap technique requires use of - Answer-an increase in OID
UNIT 5 (PHYSICS 2) LATEST 2024 EXAM
QUESTIONS AND CORRECT
ANSWERS|GRADED A+
In the diagnostic energy range, which interaction reduces image contrast the most -
Answer-Compton scatter
When radiographic grids are used which of the following increases - Answer-
radiographic contrats and patient dose
The focal range of a focused grid is most closely related to the - Answer-
convergence line
Which grid requires the greatest patient dose - Answer-16:1
Which grid does not allow angling of the x-ray beam in any direction - Answer-
crossed grid
Which material would be unacceptable for use as interstate material - Answer-
tungsten
An increase in scatter radiation will___ receptor exposure and ____ contrast -
Answer-increases, decreases
Which grid would provide contrast improvement - Answer-12:1
The mirror in the collimator must be at a __ angle if the light is to be projected in
the same position as the x-ray field - Answer-45 degrees
Suppose that a technique of 72 kvp 45mAs with a 8:1 grid produces an excellent
quality radiograph with an optimum receptor exposure. What would happen if the
same technique was used with a 12:1 grid - Answer-the receptor would decrease
and the patient dose would stay the same
, CONTROL OF SCATTER RADIATION:
UNIT 5 (PHYSICS 2) LATEST 2024 EXAM
QUESTIONS AND CORRECT
ANSWERS|GRADED A+
Which grid is the least likely to have grid cutoff when performing mobile
radiography - Answer-8:1
One advantage of a focused grid is that it can be used at any SID without causing
grid cut off - Answer-false
Grid cut off will cause the receptor exposure to decrease even if the proper
exposure technique was used - Answer-true
What happens to the amount of scatter radiation produced as the x-ray field size is
recut with tighter collimation - Answer-scatter is reduced
Describe two differences between x-ray tube filtration and the radiographic grid -
Answer-
Grid: between patient and IR, changes the exit beam coming out the patient and
discriminates based on angle
Filtration: between the tube and patient, affects the primary beam before it interact
with the patient, based on energy.
A 10:1 grid could absorb more scatter than a 10:1 linear grid - Answer-true
Increasing which of the following will increase the amount of scatter reaching the
IR - Answer-
-kvp
-thickness of part
-density of part
-x-ray field size
Air gap technique requires use of - Answer-an increase in OID
