CRDR | 暗記メーカー

暗記メーカー

CRDR

50問 • 5ヶ月前

問題一覧

1

The following statements are true about computed radiography (CR), EXCEPT: I. The response to x-ray interaction is seen as trapped electrons in a higher energy metastable state II. The CR cassette is backed by a thin sheet of carbon fiber that absorbs x-rays III. CR has lower spatial resolution than SFR

III only

2

STATEMENT 1: In CR, if the residual latent image remained, ghosting could appear in subsequent use of the IP STATEMENT 2: The CR reader scans the plate with white light in a zigzag or raster pattern

Statement 1 is true and Statement 2 is false

3

Which of the following statements describes the reflective layer of an IP? I. This is a layer that sends light in a forward direction when released in the CR reader II. It is usually black to reduce the spread of stimulating light and the escape of emitted light III. Some detail is lost in this layer

All of the above

4

The term latitude describes: 1. an emulsion's ability to record a range of densities 2. the degree of error tolerated with given exposure factors 3. the conversion efficiency of a given intensifying screen

1 and 2 only

5

It is added in the PSP to act as an activator and responsible for the storage property of the PSL.

Eu

6

In CR, the radiographic image is recorded on a thin sheet of plastic known as the ___.

Imaging plate

7

Contrast resolution in digital imaging can be influenced by 1. Window level (WL) 2. Window width (WW) 3. Look-up table (LUT)

2 and 3 only

8

In what year was digital radiography first introduced by Fuji?

1981

9

The following are advantages of digital radiography (DR), EXCEPT:

DR is dependent on exposure settings and maintenance

10

Results from averaging of the frequency of each pixel with surrounding pixel values to remove high-frequency noise.

Smoothing

11

The use of thicker PSP results to: I. More spread of laser beam II. Lower image resolution III. Sharper resolution

I and II only

12

It is the detector of choice for CR.

Photodiodes

13

It is a software correction that is performed to equalize the response of each pixel to a uniform x-ray beam.

Flatfielding

14

What technique is used to correct algorithms specific to each type of digital image receptor by assigning digital values to each dead pixel, row, or column?

Interpolation

15

It is responsible for amplifying light and sending it to a digitizer.

d. Both A and B

16

There are used to ensure that the beam is positioned consistently.

Mirror

17

The imaging plate is either scanned using a: I. H laser beam II. Solid state laser diodes III. He laser beam

II and III only

18

Which of the following does NOT belong to the four principal characteristics of a medical image? a. Artifacts b. Contrast Resolution c. Detail d. Image Noise

none of the above

19

It is the latent image center in computed radiography (CR)

activator

20

This is a semirigid material that gives the imaging sheet some strength

support layer

21

The following statements are true about the active layer of the imaging plate, EXCEPT:

this layer may also contain a dye that differentially absorbs the stimulating light and to allow that light to spread

22

The CR reader scans the plate with red light in a ____ pattern.

d. both a and c

23

Which of the following are radiographic faults that can occur in digital radiography? a. Ghosting b. Incorrect adjusted processing algorith c. Overprocessing d. Underdevelopment

a, b, and c

24

SPS means _____

Storage Phosphor Screen

25

The types of shape distortion include: 1. magnification 2. elongation 3. foreshortening

2 and 3

26

For the same FOV, as the matrix size increases 1. spatial resolution increases 2. image quality increases 3. pixel size decreases

1, 2, and 3

27

Factors that determine recorded detail in digital imaging include 1. part motion 2. geometric factors 3. spatial resolution

1, 2, and 3

28

Electronic imaging terms used to indicate the intensity of radiation reaching the IR include: 1. exposure index 2. sensitivity (S) number 3. field of view (FOV)

1 and 2

29

A term that is often used to describe computer programs, or software functioning, in medical imaging is

algorithm

30

Types of postprocessing of electronic/digital images include: 1. image stitching 2. contrast enhancement 3. windowing

1, 2, and 3

31

What is the best way to reduce magnification distortion?

decrease the OID

32

Which of the following devices functions to produce hard copies of digital images?

laser printer

33

Which of the following would most likely be used to acquire digital x-ray images?

CsI

34

Processing digital x-ray image by unsharp mask enhancement likely increases the:

visibility of edges

35

Which of the following is least likely to be used for the detection of diagnostic x-rays?

charged coupled device

36

Measured limiting spatial resolution (lp/mm) of screen-film mammography is likely:

16

37

Which of the following possesses the widest dynamic range?

DR

38

Which of the following focal spot sizes should be employed for magnification radiography?

0.2 mm

39

It is used to transform the raw information to a new correct gray value.

Look up table

40

Visible differences in adjacent structures on a radiographic image describe:

contrast resolution

41

A primary advantage to digital radiography is:

postprocessing manipulation of the image

42

The appearance of digital images on technologists' monitor is:

not as good as on radiologists' monitor

43

Excessive processing of the digital image may:

degrade visibility of anatomy

44

A high SNR provides an image with:

higher spatial resolution

45

The range of receptor exposures that provides a quality image is called:

exposure latitude

46

The number of pixels making up the digital image is the:

matrix size

47

What converts light into a charge?

photodiode

48

A material that absorbs x-ray energy and emits part of that energy as visible light is called:

scintillator

49

What term is commonly used to describe the range of grays a particular digital system is capable of resolving?

Dynamic Range

50

The act of reading the analog information at the preset sampling rate.

sensing

Imaging Equipment and Managment (1)

Imaging Equipment and Managment (1)

polyyamyap · 100問 · 5ヶ月前

Imaging Equipment and Managment (1)

Imaging Equipment and Managment (1)

100問 • 5ヶ月前

Imaging Equipment and Management (2)

Imaging Equipment and Management (2)

polyyamyap · 100問 · 5ヶ月前

Imaging Equipment and Management (2)

Imaging Equipment and Management (2)

100問 • 5ヶ月前

Imaging Equiment and Maintenance (3)

Imaging Equiment and Maintenance (3)

polyyamyap · 52問 · 5ヶ月前

Imaging Equiment and Maintenance (3)

Imaging Equiment and Maintenance (3)

52問 • 5ヶ月前

SET 1

SET 1

polyyamyap · 100問 · 5ヶ月前

SET 1

SET 1

100問 • 5ヶ月前

SET 2

SET 2

polyyamyap · 12問 · 5ヶ月前

SET 2

SET 2

12問 • 5ヶ月前

SET 3

SET 3

polyyamyap · 56問 · 5ヶ月前

SET 3

SET 3

56問 • 5ヶ月前

Radiation Biology (1)

Radiation Biology (1)

polyyamyap · 100問 · 5ヶ月前

Radiation Biology (1)

Radiation Biology (1)

100問 • 5ヶ月前

Radiation Biology (2)

Radiation Biology (2)

polyyamyap · 25問 · 5ヶ月前

Radiation Biology (2)

Radiation Biology (2)

25問 • 5ヶ月前

Film Screen Image Acquisition Processing & Image Analysis

Film Screen Image Acquisition Processing & Image Analysis

polyyamyap · 55問 · 5ヶ月前

Film Screen Image Acquisition Processing & Image Analysis

Film Screen Image Acquisition Processing & Image Analysis

55問 • 5ヶ月前

Radiologic Pathology

Radiologic Pathology

polyyamyap · 52問 · 5ヶ月前

Radiologic Pathology

Radiologic Pathology

52問 • 5ヶ月前

IR

IR

polyyamyap · 33問 · 4ヶ月前

IR

IR

33問 • 4ヶ月前

Ethics and Jurisprudence

Ethics and Jurisprudence

polyyamyap · 15問 · 4ヶ月前

Ethics and Jurisprudence

Ethics and Jurisprudence

15問 • 4ヶ月前

CT

CT

polyyamyap · 5問 · 4ヶ月前

CT

CT

5問 • 4ヶ月前

Practice Test 1

Practice Test 1

polyyamyap · 50問 · 3ヶ月前

Practice Test 1

Practice Test 1

50問 • 3ヶ月前

問題一覧

1

The following statements are true about computed radiography (CR), EXCEPT: I. The response to x-ray interaction is seen as trapped electrons in a higher energy metastable state II. The CR cassette is backed by a thin sheet of carbon fiber that absorbs x-rays III. CR has lower spatial resolution than SFR

III only

2

STATEMENT 1: In CR, if the residual latent image remained, ghosting could appear in subsequent use of the IP STATEMENT 2: The CR reader scans the plate with white light in a zigzag or raster pattern

Statement 1 is true and Statement 2 is false

3

Which of the following statements describes the reflective layer of an IP? I. This is a layer that sends light in a forward direction when released in the CR reader II. It is usually black to reduce the spread of stimulating light and the escape of emitted light III. Some detail is lost in this layer

All of the above

4

The term latitude describes: 1. an emulsion's ability to record a range of densities 2. the degree of error tolerated with given exposure factors 3. the conversion efficiency of a given intensifying screen

1 and 2 only

5

It is added in the PSP to act as an activator and responsible for the storage property of the PSL.

Eu

6

In CR, the radiographic image is recorded on a thin sheet of plastic known as the ___.

Imaging plate

7

Contrast resolution in digital imaging can be influenced by 1. Window level (WL) 2. Window width (WW) 3. Look-up table (LUT)

2 and 3 only

8

In what year was digital radiography first introduced by Fuji?

1981

9

The following are advantages of digital radiography (DR), EXCEPT:

DR is dependent on exposure settings and maintenance

10

Results from averaging of the frequency of each pixel with surrounding pixel values to remove high-frequency noise.

Smoothing

11

The use of thicker PSP results to: I. More spread of laser beam II. Lower image resolution III. Sharper resolution

I and II only

12

It is the detector of choice for CR.

Photodiodes

13

It is a software correction that is performed to equalize the response of each pixel to a uniform x-ray beam.

Flatfielding

14

What technique is used to correct algorithms specific to each type of digital image receptor by assigning digital values to each dead pixel, row, or column?

Interpolation

15

It is responsible for amplifying light and sending it to a digitizer.

d. Both A and B

16

There are used to ensure that the beam is positioned consistently.

Mirror

17

The imaging plate is either scanned using a: I. H laser beam II. Solid state laser diodes III. He laser beam

II and III only

18

Which of the following does NOT belong to the four principal characteristics of a medical image? a. Artifacts b. Contrast Resolution c. Detail d. Image Noise

none of the above

19

It is the latent image center in computed radiography (CR)

activator

20

This is a semirigid material that gives the imaging sheet some strength

support layer

21

The following statements are true about the active layer of the imaging plate, EXCEPT:

this layer may also contain a dye that differentially absorbs the stimulating light and to allow that light to spread

22

The CR reader scans the plate with red light in a ____ pattern.

d. both a and c

23

Which of the following are radiographic faults that can occur in digital radiography? a. Ghosting b. Incorrect adjusted processing algorith c. Overprocessing d. Underdevelopment

a, b, and c

24

SPS means _____

Storage Phosphor Screen

25

The types of shape distortion include: 1. magnification 2. elongation 3. foreshortening

2 and 3

26

For the same FOV, as the matrix size increases 1. spatial resolution increases 2. image quality increases 3. pixel size decreases

1, 2, and 3

27

Factors that determine recorded detail in digital imaging include 1. part motion 2. geometric factors 3. spatial resolution

1, 2, and 3

28

Electronic imaging terms used to indicate the intensity of radiation reaching the IR include: 1. exposure index 2. sensitivity (S) number 3. field of view (FOV)

1 and 2

29

A term that is often used to describe computer programs, or software functioning, in medical imaging is

algorithm

30

Types of postprocessing of electronic/digital images include: 1. image stitching 2. contrast enhancement 3. windowing

1, 2, and 3

31

What is the best way to reduce magnification distortion?

decrease the OID

32

Which of the following devices functions to produce hard copies of digital images?

laser printer

33

Which of the following would most likely be used to acquire digital x-ray images?

CsI

34

Processing digital x-ray image by unsharp mask enhancement likely increases the:

visibility of edges

35

Which of the following is least likely to be used for the detection of diagnostic x-rays?

charged coupled device

36

Measured limiting spatial resolution (lp/mm) of screen-film mammography is likely:

16

37

Which of the following possesses the widest dynamic range?

DR

38

Which of the following focal spot sizes should be employed for magnification radiography?

0.2 mm

39

It is used to transform the raw information to a new correct gray value.

Look up table

40

Visible differences in adjacent structures on a radiographic image describe:

contrast resolution

41

A primary advantage to digital radiography is:

postprocessing manipulation of the image

42

The appearance of digital images on technologists' monitor is:

not as good as on radiologists' monitor

43

Excessive processing of the digital image may:

degrade visibility of anatomy

44

A high SNR provides an image with:

higher spatial resolution

45

The range of receptor exposures that provides a quality image is called:

exposure latitude

46

The number of pixels making up the digital image is the:

matrix size

47

What converts light into a charge?

photodiode

48

A material that absorbs x-ray energy and emits part of that energy as visible light is called:

scintillator

49

What term is commonly used to describe the range of grays a particular digital system is capable of resolving?

Dynamic Range

50

The act of reading the analog information at the preset sampling rate.

sensing