RADIOGRAPHIC IMAGING AND EXPOSURE 7TH
EDITION QUESTIONS WITH VERIFIED ANSWERS
WITH RATIONALES CHAPTER 1-10 2025
____________________________________________________________________________________
During selection of the focal spot size, the radiographer is really determining the:
a. angle of the anode used
b. actual size of the filament used
c. energy of electrons available for tube current
d. distance the electrons travel from cathode to anode
b. actual size of the filament used
The distance between the radiation source and the image receptor is the:
a. magnification factor
b. SID
c. OID
d. SOD
b. SID
The relationship between the distance and x-ray beam intensity, specifically that the intensity of the
x-ray beam in inversely proportional to the square of the distance from the source, is the:
a. direct square law
b. gurney-mott theory
c. inverse square law
d. magnification law
c. inverse square law
If a person stands 3 feet from the source of exposure, receives an exposure of 160 mR, and then
moves to 6 feet away from the source of exposure, what would be the new exposure according to the
inverse square law?:
a. 10 mR
b. 40 mR
c. 640 mR
d. 2560 mR
b. 40 mR
,If a person stands 12 feet from the source of exposure, receives an exposure of 60 mR, and then
moves to 3 feet from the source of exposure, what would be the new exposure according to the
inverse square law?:
a. 15 mR
b. 45 mR
c. 240 mR
d. 960 mR
d. 960 mR
The distance between the object being imaged and the IR is the:
a. magnification factor
b. SID
c. OID
d. SOD
c. OID
When the SID is divided by the SOF, what is the result called?:
a. magnification factor
b. degree of unsharpness
c. OID
d. image width
a. magnification factor
If the first image of a chest is done using 72 inch and 12 mAs, and a second image is done using 40 in,
how much mAs should be used to maintain exposure to the IR?:
a. 2 mAs
b. 4 mAs
c. 7 mAs
d. 9 mAs
b. 4 mAs
A quality radiographic image is done using 10 mAs, 70 kVP, and a 12:1 ratio grid. How much mAs is
needed to produce an image with the same exposure to the IR when the grid is removed?:
a. 2 mAs
b. 5 mAs
c. 15 mAs
d. 50 mAs
a. 2 mAs
,The original technique is 80 kVp at 20 mAs using an 8:1 grid ratio. What change in mAs is needed if
changing to a 16:1 grid ratio?:
a. 13 mAs
b. 30 mAs
c. 40 mAs
d. 50 mAs
b. 30 mAs
The misrepresentation of the size of an object is:
a. shape distortion
b. magnification
c. foreshortening
d. elongation
b. magnification
In order to image a structure that is located anteriorly in the body, it is best radiographed to minimize
magnification by doing a(n)______ projection:
a. posterior-anterior
b. anterior-posterior
c. lateral
d. oblique
a. posterior-anterior
Magnification is affected by:
a. focal spot size
b. collimation
c. SID
d. B and C
c. SID
If the image size measures 4.6 inches, and the magnification factor is 1.42, what is the size of the
object?:
a. 2.43 inches
b. 3.24 inches
c. 5.63 inches
d. 6.53 inches
b. 3.24 inches
, Shape distortion can be created by:
a. decreasing SOD
b. angling the central ray
c. increasing the SID
d. decreasing SOD angling the CR
d. decreasing SOD angling the CR
(angling CR is also correct, but option d is the most correct)
The SOD can be determined by:
a. adding SID and OID
b. adding the MF to the OID
c. subtracting OID from SID
d. subtracting SID from the MF
c. subtracting OID from SID
What effect will increasing SID have on spatial resolution?:
a. increased spatial resolution
b. decreased spatial resolution
c. no effect on spatial resolution
a. increased spatial resolution
For every ______ of part thickness, the radiographer should adjust the mAs by a factor of 2:
a. 2 to 3 cm
b. 4 to 5 cm
c. 6 to 7 cm
d. 8 to 9 cm
b. 4 to 5 cm
If the first radiograph of a foot is done using 4 mAs at 40 in, and a second radiograph is done using 50
in, how much mAs should be used to maintain exposure to the IR?:
a. 1 mAs
b. 2 mAs
c. 6 mAs
d. 12 mAs
c. 6 mAs
Assuming all produce appropriate diagnostic images, which of the following would be the best
exposure technique choice when performing a chest radiograph on an infant?:
EDITION QUESTIONS WITH VERIFIED ANSWERS
WITH RATIONALES CHAPTER 1-10 2025
____________________________________________________________________________________
During selection of the focal spot size, the radiographer is really determining the:
a. angle of the anode used
b. actual size of the filament used
c. energy of electrons available for tube current
d. distance the electrons travel from cathode to anode
b. actual size of the filament used
The distance between the radiation source and the image receptor is the:
a. magnification factor
b. SID
c. OID
d. SOD
b. SID
The relationship between the distance and x-ray beam intensity, specifically that the intensity of the
x-ray beam in inversely proportional to the square of the distance from the source, is the:
a. direct square law
b. gurney-mott theory
c. inverse square law
d. magnification law
c. inverse square law
If a person stands 3 feet from the source of exposure, receives an exposure of 160 mR, and then
moves to 6 feet away from the source of exposure, what would be the new exposure according to the
inverse square law?:
a. 10 mR
b. 40 mR
c. 640 mR
d. 2560 mR
b. 40 mR
,If a person stands 12 feet from the source of exposure, receives an exposure of 60 mR, and then
moves to 3 feet from the source of exposure, what would be the new exposure according to the
inverse square law?:
a. 15 mR
b. 45 mR
c. 240 mR
d. 960 mR
d. 960 mR
The distance between the object being imaged and the IR is the:
a. magnification factor
b. SID
c. OID
d. SOD
c. OID
When the SID is divided by the SOF, what is the result called?:
a. magnification factor
b. degree of unsharpness
c. OID
d. image width
a. magnification factor
If the first image of a chest is done using 72 inch and 12 mAs, and a second image is done using 40 in,
how much mAs should be used to maintain exposure to the IR?:
a. 2 mAs
b. 4 mAs
c. 7 mAs
d. 9 mAs
b. 4 mAs
A quality radiographic image is done using 10 mAs, 70 kVP, and a 12:1 ratio grid. How much mAs is
needed to produce an image with the same exposure to the IR when the grid is removed?:
a. 2 mAs
b. 5 mAs
c. 15 mAs
d. 50 mAs
a. 2 mAs
,The original technique is 80 kVp at 20 mAs using an 8:1 grid ratio. What change in mAs is needed if
changing to a 16:1 grid ratio?:
a. 13 mAs
b. 30 mAs
c. 40 mAs
d. 50 mAs
b. 30 mAs
The misrepresentation of the size of an object is:
a. shape distortion
b. magnification
c. foreshortening
d. elongation
b. magnification
In order to image a structure that is located anteriorly in the body, it is best radiographed to minimize
magnification by doing a(n)______ projection:
a. posterior-anterior
b. anterior-posterior
c. lateral
d. oblique
a. posterior-anterior
Magnification is affected by:
a. focal spot size
b. collimation
c. SID
d. B and C
c. SID
If the image size measures 4.6 inches, and the magnification factor is 1.42, what is the size of the
object?:
a. 2.43 inches
b. 3.24 inches
c. 5.63 inches
d. 6.53 inches
b. 3.24 inches
, Shape distortion can be created by:
a. decreasing SOD
b. angling the central ray
c. increasing the SID
d. decreasing SOD angling the CR
d. decreasing SOD angling the CR
(angling CR is also correct, but option d is the most correct)
The SOD can be determined by:
a. adding SID and OID
b. adding the MF to the OID
c. subtracting OID from SID
d. subtracting SID from the MF
c. subtracting OID from SID
What effect will increasing SID have on spatial resolution?:
a. increased spatial resolution
b. decreased spatial resolution
c. no effect on spatial resolution
a. increased spatial resolution
For every ______ of part thickness, the radiographer should adjust the mAs by a factor of 2:
a. 2 to 3 cm
b. 4 to 5 cm
c. 6 to 7 cm
d. 8 to 9 cm
b. 4 to 5 cm
If the first radiograph of a foot is done using 4 mAs at 40 in, and a second radiograph is done using 50
in, how much mAs should be used to maintain exposure to the IR?:
a. 1 mAs
b. 2 mAs
c. 6 mAs
d. 12 mAs
c. 6 mAs
Assuming all produce appropriate diagnostic images, which of the following would be the best
exposure technique choice when performing a chest radiograph on an infant?:
