THE Test
Bank for
Digital
Radiography
and PACS 3rd
Edition Carter
,Chapter 02: Digital Imaging Characteristics
| | | |
Carter: Digital Radiography and PACS, 3rd Edition
| | | | | |
MULTIPLE |CHOICE
1. Multiple |numeric |values |divided |into |an |array |of |small |elements |capable |of |being |processed |is
the |definition |of |
| images.
a. analog
b. digital
c. medical
d. radiographic
ANS: | B OBJ: | | Differentiate |between |analog |and |digital |images.
2. The |continuous |and |varying |levels |of |brightness |and |colors |describe | images.
a. analog
b. digital
c. medical
d. radiographic
ANS: | B OBJ: | | Differentiate |between |analog |and |digital |images.
3. Critical |characteristics |of |a |digital |image |include |all |of |the |following |except
a. contrast |resolution.
b. noise |efficiency.
c. sample |resolution.
d. dose |efficiency |of |the |receptor.
ANS: | C OBJ: | | Differentiate |between |analog |and |digital |images.
4. Which |of |the |following |statements |is |not |true?
a. Matrix |size |can |change |without |affecting |the |FOV.
b. FOV |can |change |without |affecting |the |matrix.
c. Changing |the |matrix |or |the |FOV |will |change |the |size |of |the |pixel.
d. Changing |the |matrix |and |the |FOV |will |not |change |the |size |of |the |pixel.
ANS: | D OBJ: | | Relate |pixel |size, |matrix |size, |and |FOV |to |each |other.
5. Each |square |in |a |matrix |is |called |a
a. matrix |element.
b. picture |element.
c. bit.
d. byte.
ANS: | B OBJ: | | Define |pixel |and |image |matrix |and |characteristics |of |each.
6. The |number |of |bits |per |pixel |is |known |as |bit
a. pitch.
b. depth.
c. height.
d. width.
, ANS: | B OBJ: | | Define |pixel |and |image |matrix |and |characteristics |of |each.
7. If |a |pixel |has |a |bit |depth |of |29, |the |number |of |gray |tones |that |pixel |can |produce |is
a. 256.
b. 512.
c. 1024.
d. 2500.
ANS: | B OBJ: | | Define |pixel |and |image |matrix |and |characteristics |of |each.
8. The |size |of |the |pixel |is |determined |by |the
a. bit.
b. bit |depth.
c. matrix.
d. byte.
ANS: | C OBJ: | | Define |pixel |and |image |matrix |and |characteristics |of |each.
9. Which |of |the |following |statements |is |not |true?
a. Exposure |index |refers |to |the |amount |of |exposure |to |the |patient.
b. Exposure |index |refers |to |the |amount |of |exposure |to |the |image |receptor.
c. Exposure |is |not |uniformly |represented |across |manufacturers.
d. Exposure |index |standardization |is |beneficial |to |the |technologist.
ANS: | A OBJ: | | Discriminate |between |standard |units |of |measure |for |exposure |indicators.
10. The |measurement |for |radiation |that |was |incident |on |the |image |receptor |for |a |particular
exposure |is |known |as
|
a. Gy.
b. KSTD.
c. KIND.
d. KTGT.
ANS: | C OBJ: | | Discriminate |between |standard |units |of |measure |for |exposure |indicators.
11. Deviation |index |is |the |difference |between | and | expressed |in |logarithmic |fashion.
a. actual |exposure |(KIND); |target |exposure |(KTGT)
b. standard |exposure |(KSTD); |actual |exposure |(KIND)
c. standard |exposure |(KSTD); |target |exposure |(KTGT)
ANS: | A OBJ: | | Discriminate |between |standard |units |of |measure |for |exposure |indicators.
12. Factors |that |can |adversely |affect |the |pixel |values |expressed |in |the |deviation |index |include |all |of
the |following |except
|
a. gonadal |shielding |within |the |image.
b. a |prosthesis |within |the |image.
c. failure |of |the |system |to |recognize |the |exposure |indicator.
d. failure |of |the |system |to |recognize |the |collimated |border.
ANS: | C OBJ: | | Discriminate |between |standard |units |of |measure |for |exposure |indicators.
13. How |dark |or |light |a |digital |image |appears |on |a |display |monitor |is |known |as
, a. density.
b. contrast |resolution.
c. brightness.
d. spatial |resolution.
ANS: | C OBJ: | | Define |image |brightness.
14. The |ability |of |a |digital |system |to |display |subtle |changes |in |shades |of |gray |is |called
a. image |quality.
b. contrast |resolution.
c. spatial |resolution.
d. dynamic |range.
ANS: | B OBJ: | | Discuss |the |differences |between |spatial |and |contrast |resolution.
15. The |ability |of |an |imaging |system |to |demonstrate |small |details |of |an |object |is |known |as
a. image |quality.
b. contrast |resolution.
c. spatial |resolution.
d. dynamic |range.
ANS: | C OBJ: | | Discuss |the |differences |between |spatial |and |contrast |resolution.
16. A |system’s |ability |to |respond |to |varying |levels |of |exposure, |resulting |in |more |detail, |is
|referred |to |as
a. spatial |resolution.
b. dynamic |range.
c. contrast |resolution.
d. dynamic |resolution.
ANS: | B OBJ: | | Discuss |the |differences |between |spatial |and |contrast |resolution.
17. “The |sum |of |the |components |in |a |recording |system |cannot |be |greater |than |the |system |as |a
|whole” |is |a |definition |of
a. modulation |transfer |function |(MTF).
b. enhanced |visualization |image |processing.
c. digital |image |contrast |and |density |latitude.
d. principles |of |contrast |enhancement.
ANS: | A
OBJ: | | Discuss |the |implications |of |image |noise, |MTF, |and |detective |quantum |efficiency.
18. A |perfect |image |processing |system |would |have |an |MTF |of
a. 1%.
b. 10%.
c. 100%.
d. 1000%.
ANS: | C
OBJ: | | Discuss |the |implications |of |image |noise, |MTF, |and |detective |quantum |efficiency.
19. The |more |light |spread, |the | the |MTF.
a. higher
Bank for
Digital
Radiography
and PACS 3rd
Edition Carter
,Chapter 02: Digital Imaging Characteristics
| | | |
Carter: Digital Radiography and PACS, 3rd Edition
| | | | | |
MULTIPLE |CHOICE
1. Multiple |numeric |values |divided |into |an |array |of |small |elements |capable |of |being |processed |is
the |definition |of |
| images.
a. analog
b. digital
c. medical
d. radiographic
ANS: | B OBJ: | | Differentiate |between |analog |and |digital |images.
2. The |continuous |and |varying |levels |of |brightness |and |colors |describe | images.
a. analog
b. digital
c. medical
d. radiographic
ANS: | B OBJ: | | Differentiate |between |analog |and |digital |images.
3. Critical |characteristics |of |a |digital |image |include |all |of |the |following |except
a. contrast |resolution.
b. noise |efficiency.
c. sample |resolution.
d. dose |efficiency |of |the |receptor.
ANS: | C OBJ: | | Differentiate |between |analog |and |digital |images.
4. Which |of |the |following |statements |is |not |true?
a. Matrix |size |can |change |without |affecting |the |FOV.
b. FOV |can |change |without |affecting |the |matrix.
c. Changing |the |matrix |or |the |FOV |will |change |the |size |of |the |pixel.
d. Changing |the |matrix |and |the |FOV |will |not |change |the |size |of |the |pixel.
ANS: | D OBJ: | | Relate |pixel |size, |matrix |size, |and |FOV |to |each |other.
5. Each |square |in |a |matrix |is |called |a
a. matrix |element.
b. picture |element.
c. bit.
d. byte.
ANS: | B OBJ: | | Define |pixel |and |image |matrix |and |characteristics |of |each.
6. The |number |of |bits |per |pixel |is |known |as |bit
a. pitch.
b. depth.
c. height.
d. width.
, ANS: | B OBJ: | | Define |pixel |and |image |matrix |and |characteristics |of |each.
7. If |a |pixel |has |a |bit |depth |of |29, |the |number |of |gray |tones |that |pixel |can |produce |is
a. 256.
b. 512.
c. 1024.
d. 2500.
ANS: | B OBJ: | | Define |pixel |and |image |matrix |and |characteristics |of |each.
8. The |size |of |the |pixel |is |determined |by |the
a. bit.
b. bit |depth.
c. matrix.
d. byte.
ANS: | C OBJ: | | Define |pixel |and |image |matrix |and |characteristics |of |each.
9. Which |of |the |following |statements |is |not |true?
a. Exposure |index |refers |to |the |amount |of |exposure |to |the |patient.
b. Exposure |index |refers |to |the |amount |of |exposure |to |the |image |receptor.
c. Exposure |is |not |uniformly |represented |across |manufacturers.
d. Exposure |index |standardization |is |beneficial |to |the |technologist.
ANS: | A OBJ: | | Discriminate |between |standard |units |of |measure |for |exposure |indicators.
10. The |measurement |for |radiation |that |was |incident |on |the |image |receptor |for |a |particular
exposure |is |known |as
|
a. Gy.
b. KSTD.
c. KIND.
d. KTGT.
ANS: | C OBJ: | | Discriminate |between |standard |units |of |measure |for |exposure |indicators.
11. Deviation |index |is |the |difference |between | and | expressed |in |logarithmic |fashion.
a. actual |exposure |(KIND); |target |exposure |(KTGT)
b. standard |exposure |(KSTD); |actual |exposure |(KIND)
c. standard |exposure |(KSTD); |target |exposure |(KTGT)
ANS: | A OBJ: | | Discriminate |between |standard |units |of |measure |for |exposure |indicators.
12. Factors |that |can |adversely |affect |the |pixel |values |expressed |in |the |deviation |index |include |all |of
the |following |except
|
a. gonadal |shielding |within |the |image.
b. a |prosthesis |within |the |image.
c. failure |of |the |system |to |recognize |the |exposure |indicator.
d. failure |of |the |system |to |recognize |the |collimated |border.
ANS: | C OBJ: | | Discriminate |between |standard |units |of |measure |for |exposure |indicators.
13. How |dark |or |light |a |digital |image |appears |on |a |display |monitor |is |known |as
, a. density.
b. contrast |resolution.
c. brightness.
d. spatial |resolution.
ANS: | C OBJ: | | Define |image |brightness.
14. The |ability |of |a |digital |system |to |display |subtle |changes |in |shades |of |gray |is |called
a. image |quality.
b. contrast |resolution.
c. spatial |resolution.
d. dynamic |range.
ANS: | B OBJ: | | Discuss |the |differences |between |spatial |and |contrast |resolution.
15. The |ability |of |an |imaging |system |to |demonstrate |small |details |of |an |object |is |known |as
a. image |quality.
b. contrast |resolution.
c. spatial |resolution.
d. dynamic |range.
ANS: | C OBJ: | | Discuss |the |differences |between |spatial |and |contrast |resolution.
16. A |system’s |ability |to |respond |to |varying |levels |of |exposure, |resulting |in |more |detail, |is
|referred |to |as
a. spatial |resolution.
b. dynamic |range.
c. contrast |resolution.
d. dynamic |resolution.
ANS: | B OBJ: | | Discuss |the |differences |between |spatial |and |contrast |resolution.
17. “The |sum |of |the |components |in |a |recording |system |cannot |be |greater |than |the |system |as |a
|whole” |is |a |definition |of
a. modulation |transfer |function |(MTF).
b. enhanced |visualization |image |processing.
c. digital |image |contrast |and |density |latitude.
d. principles |of |contrast |enhancement.
ANS: | A
OBJ: | | Discuss |the |implications |of |image |noise, |MTF, |and |detective |quantum |efficiency.
18. A |perfect |image |processing |system |would |have |an |MTF |of
a. 1%.
b. 10%.
c. 100%.
d. 1000%.
ANS: | C
OBJ: | | Discuss |the |implications |of |image |noise, |MTF, |and |detective |quantum |efficiency.
19. The |more |light |spread, |the | the |MTF.
a. higher
