RAD190-ch7.txt

Inversely related to image density and beam intensity.
A. mA
B. kVp
C. Time
D. SID

Together determine the total quantity of radiation produced.
A. mA
B. Time
C. kVp
D. SID

Has a directly proportional relationship to image density.
A. mA
B. Time
C. kVp
D. SID

Increase by 15% will approximately double image density.
A. SID
B. Time
C. kVp
D. mA

Decreasing this factor decreases the penetrating ability of the x-ray beam.
A. Time
B. SID
C. kVp
D. mA

Primary factor used to control image contrast
A. mA
B. kVp
C. SID
D. Time

Increasing this factor results in lower patient dose.
A. Time
B. kVp
C. mA
D. SID

Usually, this factor is standardized and does not vary from patient to patient.
A. mA
B. kVp
C. SID
D. Time

Reducing this factor minimizes the effect of patient motion causing blur on the image.
A. SID
B. kVp
C. mA
D. Time

Doubling this factor results in doubling radiographic density.
A. mA
B. Time
C. kVp
D. SID

Doubling this factor results in ¼ radiographic density.
A. kVp
B. mA
C. Time
D. SID

difference in density between adjacent areas of the image
A. shape distortion
B. detail
C. density
D. contrast
E. size distortion (magnification)

overall blackness of the radiograph
A. detail
B. contrast
C. size distortion (magnification)
D. density
E. shape distortion

misrepresentation of the true shape of the object
A. detail
B. contrast
C. shape distortion
D. density
E. size distortion (magnification)

image clarity or the ability to visualize small structures
A. contrast
B. size distortion (magnification)
C. detail
D. shape distortion
E. density

Primarily controlled by kVp.
A. density
B. size distortion (magnification)
C. detail
D. contrast
E. shape distortion

Primarily controlled by mAs.
A. contrast
B. detail
C. density
D. size distortion (magnification)
E. shape distortion

Decreased by increasing SID.
A. density
B. contrast
C. detail
D. size distortion (magnification)
E. shape distortion

Increased by increasing SID.
A. shape distortion
B. density
C. size distortion (magnification)
D. detail
E. contrast

Increased by angulation of the body part
A. contrast
B. shape distortion
C. density
D. size distortion (magnification)
E. detail

Increased by angulation of the Central Ray
A. shape distortion
B. size distortion (magnification)
C. contrast
D. density
E. detail

Decreased by using larger focal spot size
A. contrast
B. density
C. detail
D. size distortion (magnification)
E. shape distortion

Decreased by increased patient motion
A. contrast
B. size distortion (magnification)
C. density
D. shape distortion
E. detail

Increased by increased OID.
A. shape distortion
B. contrast
C. size distortion (magnification)
D. detail
E. density

Decreased by increased screen crystal size.
A. contrast
B. density
C. detail
D. shape distortion
E. size distortion (magnification)

T or F?
Increased OID results in increased penumbra and decreased image clarity.
True False

T or F?
The geometric factors that affect image detail are OID, SID, and focal spot size.
True False

T or F?
In general, faster speed screens have larger phosphor crystals resulting in increased radiographic detail or image sharpness.
True False

T or F?
The Half Value Layer is an indication of beam quantity.
True False

T or F?
The effect of added filtration is to decrease the amount of low energy radiation reaching the patient.
True False

T or F?
The inherent blurriness at the edges of objects represented in the image is termed penumbra.
True False

T or F?
Low mAs settings used with high speed intensifying screens can result in radiographic image mottle.
True False

Which mA and time combination produces the greatest number of x-rays?
A) 200 mA and 0.2 seconds
B) 200 mA and 0.1 seconds
C) 100 mA and 0.5 seconds
D) 100 mA and 0.3 seconds

If the radiation intensity at 30² is 10 mR, what will the intensity be at 60²?
A) 2.5 mR
B) 40 mR
C) 5 mR
D) 20 mR