Bushong practice final (semester 2) well
answered to pass graded A+
Image-forming x-rays include those which have been ______
A) transmitted without interaction
B)scattered throughout compton interaction
C)absorbed through photoelectric interaction
D) both A and B - correct answer ✔✔A) transmitted without interaction
The x-ray interaction that contributes to the clear parts of the image is _____
A) coherent scatter
B) compton scatter
C)photoelectric interaction
D)pair production - correct answer ✔✔C) PE interaction
The three primary factors influencing the intensity of scatter in the image-forming
beam are ______
A) mAs, kVp, and collimation
B) mAs, filtration, and grids
C) kVp, field size, and patient thickness
,D) filtration, patient thickness, and mAs - correct answer ✔✔C) kVp, field size, and
patient thickness
photoelectric interactions increase when ______ is decreased.
A) mAs
B) patient thickness
C) filtration
D) kVp - correct answer ✔✔D) kVp
scatter radiation increases as _____ increases.
A) photoelectric absorption
B) field size
C)filtration
D) contrast - correct answer ✔✔B) field size
The most commonly used beam restricting device is the _______.
A) extension cone
B) variable collimator
C) aperture diaphragm
D) compression device - correct answer ✔✔B) Variable collimator
,lowering kVp _____ patient dose and _____ image contrast.
A) lowers, decreases
B) increases, decreases
C) lowers, increases
D) increases, increases - correct answer ✔✔D) increases, increases
The use of __________ improves contrast and reduces patient dose.
A) collimation
B) high kVp
C) low kVp
D) less filtration - correct answer ✔✔A) collimation
Beam restriction with a(n) ________ is only accurate at a fixed SID.
A) aperture diaphragm
B) cone
C) collimator
D) PBL device - correct answer ✔✔A) aperture diaphragm
How can you improve image contrast with a heavy patient without increasing
patient dose?
, A) lower kVp and raise mAs
B) use tight collimation
C) raise kVp and lower mAs
D) both A and B - correct answer ✔✔B) use tight collimation
The use of a compression device will increase ______.
A) film fog
B) patient dose
C) contrast
D) scatter - correct answer ✔✔C) contrast
Contrast resolution is improved by _______.
A) tight collimation
B)lowering kVp
C) patient compression
D) all of the above - correct answer ✔✔D) all of the above
The x-rays that are transmitted through the patient without interaction contribute
to _____________.
A) useful information
B) film fog
answered to pass graded A+
Image-forming x-rays include those which have been ______
A) transmitted without interaction
B)scattered throughout compton interaction
C)absorbed through photoelectric interaction
D) both A and B - correct answer ✔✔A) transmitted without interaction
The x-ray interaction that contributes to the clear parts of the image is _____
A) coherent scatter
B) compton scatter
C)photoelectric interaction
D)pair production - correct answer ✔✔C) PE interaction
The three primary factors influencing the intensity of scatter in the image-forming
beam are ______
A) mAs, kVp, and collimation
B) mAs, filtration, and grids
C) kVp, field size, and patient thickness
,D) filtration, patient thickness, and mAs - correct answer ✔✔C) kVp, field size, and
patient thickness
photoelectric interactions increase when ______ is decreased.
A) mAs
B) patient thickness
C) filtration
D) kVp - correct answer ✔✔D) kVp
scatter radiation increases as _____ increases.
A) photoelectric absorption
B) field size
C)filtration
D) contrast - correct answer ✔✔B) field size
The most commonly used beam restricting device is the _______.
A) extension cone
B) variable collimator
C) aperture diaphragm
D) compression device - correct answer ✔✔B) Variable collimator
,lowering kVp _____ patient dose and _____ image contrast.
A) lowers, decreases
B) increases, decreases
C) lowers, increases
D) increases, increases - correct answer ✔✔D) increases, increases
The use of __________ improves contrast and reduces patient dose.
A) collimation
B) high kVp
C) low kVp
D) less filtration - correct answer ✔✔A) collimation
Beam restriction with a(n) ________ is only accurate at a fixed SID.
A) aperture diaphragm
B) cone
C) collimator
D) PBL device - correct answer ✔✔A) aperture diaphragm
How can you improve image contrast with a heavy patient without increasing
patient dose?
, A) lower kVp and raise mAs
B) use tight collimation
C) raise kVp and lower mAs
D) both A and B - correct answer ✔✔B) use tight collimation
The use of a compression device will increase ______.
A) film fog
B) patient dose
C) contrast
D) scatter - correct answer ✔✔C) contrast
Contrast resolution is improved by _______.
A) tight collimation
B)lowering kVp
C) patient compression
D) all of the above - correct answer ✔✔D) all of the above
The x-rays that are transmitted through the patient without interaction contribute
to _____________.
A) useful information
B) film fog
