Chapter 17 Radiographic Artifacts Bushong: Radiologic Science for Technologists
MULTIPLE CHOICE
1. The three classifications of digital imaging artifacts are .
a. processing, exposure, and handling/storage
b. processing, image receptor, and exposure
c. image receptor, software, and object
d. software, object, and exposure
ANS: C
The three classifications of digital imaging artifacts are image receptor, software, and
object.
2. A ghost image can occur in digital imaging because of .
a. supernatural phenomena
b. image blur
c. incomplete erasure
d. backscatter
ANS: C
A ghost image can occur in digital imaging because of incomplete erasure.
3. During preprocessing, the digital output of the image receptor may need to be
manipulated to correct for .
a. dead pixels
, b. image blur
c. ghost images
d. radiation fatigue
ANS: A
During preprocessing the digital output of the image receptor may need to be
manipulated to correct for dead pixels.
4. is done during preprocessing to correct for an irregular pattern over the image.
a. Lossy compression
b. Signal erasure
c. Partitioning
d. Flatfielding
ANS: D
Flatfielding is done during preprocessing to correct for an irregular pattern over the
image.
5. The software correction that equalizes the response of each pixel to a uniform exposure
of x-rays is called .
a. lossless compression
b. flatfielding
c. lossy compression
d. histogram selection
ANS: B
, Flatfielding is the software correction that equalizes the response of each pixel to a
uniform exposure of x-rays.
6. Which is/are done to the image during preprocessing?
I. Lossless
compressi
on
II. Partiti
oning III.
Flatfieldin
g
a. Lossless compression
b. partitioning
c. flatfielding
d. Lossy compression
ANS: C
Partitioning is done during imaging, flatfielding is done during preprocessing, and
lossless compression is done during post-processing.
7. Which modality produces the largest image files?
a. Digital or computed radiography
b. Computed tomography
c. Nuclear medicine
d. Digital mammography
ANS: D
Digital mammography produces the largest file sizes of all digital imaging.
8. What size is the average CR or DR image file per image?
MULTIPLE CHOICE
1. The three classifications of digital imaging artifacts are .
a. processing, exposure, and handling/storage
b. processing, image receptor, and exposure
c. image receptor, software, and object
d. software, object, and exposure
ANS: C
The three classifications of digital imaging artifacts are image receptor, software, and
object.
2. A ghost image can occur in digital imaging because of .
a. supernatural phenomena
b. image blur
c. incomplete erasure
d. backscatter
ANS: C
A ghost image can occur in digital imaging because of incomplete erasure.
3. During preprocessing, the digital output of the image receptor may need to be
manipulated to correct for .
a. dead pixels
, b. image blur
c. ghost images
d. radiation fatigue
ANS: A
During preprocessing the digital output of the image receptor may need to be
manipulated to correct for dead pixels.
4. is done during preprocessing to correct for an irregular pattern over the image.
a. Lossy compression
b. Signal erasure
c. Partitioning
d. Flatfielding
ANS: D
Flatfielding is done during preprocessing to correct for an irregular pattern over the
image.
5. The software correction that equalizes the response of each pixel to a uniform exposure
of x-rays is called .
a. lossless compression
b. flatfielding
c. lossy compression
d. histogram selection
ANS: B
, Flatfielding is the software correction that equalizes the response of each pixel to a
uniform exposure of x-rays.
6. Which is/are done to the image during preprocessing?
I. Lossless
compressi
on
II. Partiti
oning III.
Flatfieldin
g
a. Lossless compression
b. partitioning
c. flatfielding
d. Lossy compression
ANS: C
Partitioning is done during imaging, flatfielding is done during preprocessing, and
lossless compression is done during post-processing.
7. Which modality produces the largest image files?
a. Digital or computed radiography
b. Computed tomography
c. Nuclear medicine
d. Digital mammography
ANS: D
Digital mammography produces the largest file sizes of all digital imaging.
8. What size is the average CR or DR image file per image?
