RTE 1401 Essentials of Radiographic Physics & Imaging ch 11
Question 1.
Scatter Control
ANSWER
Primarily the result of the Compton interactions
Question 2.
What are two major factors that effect scatter radiation procuded and exiting the patient
ANSWER
-volume of tissue irradiated -kilovoltage peak (kVp)
Question 3.
The volume of tissue depends on:
ANSWER
-part thickness -x-ray beam filed size
Question 4.
A higher kVp increases the energy of _________ radition exiting the patient
ANSWER
scatter
Question 5.
Scatter is radiation is detrimental to radiographic ________ because it adds unwanted ________(____) on the image without adding
any patient information
ANSWER
-quality -exposure(fog)
Question 6.
Exposure (fog)
ANSWER
does not add any patient information to image
Question 7.
What decreases radiographic contrast in both film and digital?
ANSWER
scatter radiation
1/7
, Question 8.
Beam - Restricting Devices
ANSWER
reduces the amount of scatter radiation produced -increasing contrast
Question 9.
Radiographic Grids
ANSWER
used to improve radiographic image quality by absorbing scatter radiation that exits the patient, reducing the amount of scatter reaching the image receptor
Question 10.
What is the primary purose of beam restriction
ANSWER
-limits patient exposure
Question 11.
If you increase collimation/beam restriction what does that mean for the actual size
ANSWER
the size of the collimation/beam restriction is small
Question 12.
Beam Restriction is best for controlling ______
ANSWER
scatter
Question 13.
Advantages of Beam Restriction?
ANSWER
-decrease patient dose -reduces scatter produced within the patient -reduces scatter the IR is exposed to -increases radiographic contrast
Question 14.
What is the disadvantage of collimation?
ANSWER
potentially clip anatomy and cause repeat
Question 15.
If you increase kVp what happens to scatter
ANSWER
increases -direct relationship
2/7
Question 1.
Scatter Control
ANSWER
Primarily the result of the Compton interactions
Question 2.
What are two major factors that effect scatter radiation procuded and exiting the patient
ANSWER
-volume of tissue irradiated -kilovoltage peak (kVp)
Question 3.
The volume of tissue depends on:
ANSWER
-part thickness -x-ray beam filed size
Question 4.
A higher kVp increases the energy of _________ radition exiting the patient
ANSWER
scatter
Question 5.
Scatter is radiation is detrimental to radiographic ________ because it adds unwanted ________(____) on the image without adding
any patient information
ANSWER
-quality -exposure(fog)
Question 6.
Exposure (fog)
ANSWER
does not add any patient information to image
Question 7.
What decreases radiographic contrast in both film and digital?
ANSWER
scatter radiation
1/7
, Question 8.
Beam - Restricting Devices
ANSWER
reduces the amount of scatter radiation produced -increasing contrast
Question 9.
Radiographic Grids
ANSWER
used to improve radiographic image quality by absorbing scatter radiation that exits the patient, reducing the amount of scatter reaching the image receptor
Question 10.
What is the primary purose of beam restriction
ANSWER
-limits patient exposure
Question 11.
If you increase collimation/beam restriction what does that mean for the actual size
ANSWER
the size of the collimation/beam restriction is small
Question 12.
Beam Restriction is best for controlling ______
ANSWER
scatter
Question 13.
Advantages of Beam Restriction?
ANSWER
-decrease patient dose -reduces scatter produced within the patient -reduces scatter the IR is exposed to -increases radiographic contrast
Question 14.
What is the disadvantage of collimation?
ANSWER
potentially clip anatomy and cause repeat
Question 15.
If you increase kVp what happens to scatter
ANSWER
increases -direct relationship
2/7
