Question 1

What is the basic photometric unit?

Accepted Answer

A)  lumen 
B)  candela 
C)  lux 
D)  nit 
A)  lumen 
B)  candela 
C)  lux 
D)  nit A

Question 2

The national standard for image transmission in teleradiology is the _____ format.

Accepted Answer

A)  RIS 
B)  DICOM 
C)  MB 
D)  PACS 
A)  RIS 
B)  DICOM 
C)  MB 
D)  PACS B

Question 3

_____ is corrected by the application of an offset voltage.

Accepted Answer

A)  Spatial resolution 
B)  Line noise 
C)  Image lag 
D)  Misregistration 
A)  Spatial resolution 
B)  Line noise 
C)  Image lag 
D)  Misregistration C

Question 4

A digital display monitor is best viewed _____.

Accepted Answer

A)  straight on 
B)  from above 
C)  from below 
D)  at a 30° angle 
A)  straight on 
B)  from above 
C)  from below 
D)  at a 30° angle

Question 5

A liquid crystal is a material in a _____ state.

Accepted Answer

A)  solid 
B)  state between a liquid and a solid 
C)  liquid 
D)  state between a liquid and a gaseous 
A)  solid 
B)  state between a liquid and a solid 
C)  liquid 
D)  state between a liquid and a gaseous

Question 6

PACS stands for _____.

Accepted Answer

A)  Processing, Applications, and Computer Storage 
B)  Processing, Archiving, and Computer Storage 
C)  Physician Applications and Communication Systems 
D)  Picture Archiving and Communication Systems 
A)  Processing, Applications, and Computer Storage 
B)  Processing, Archiving, and Computer Storage 
C)  Physician Applications and Communication Systems 
D)  Picture Archiving and Communication Systems

Question 7

Reregistering an image to correct for patient motion is done with _____.

Accepted Answer

A)  edge enhancement 
B)  offset images 
C)  pixel shift 
D)  image inversion 
A)  edge enhancement 
B)  offset images 
C)  pixel shift 
D)  image inversion

Question 8

A computation of the mean pixel value within a region-of-interest is performed for _____.

Accepted Answer

A)  quantitative radiology 
B)  edge enhancement 
C)  image inversion 
D)  window and level adjustment 
A)  quantitative radiology 
B)  edge enhancement 
C)  image inversion 
D)  window and level adjustment

Question 9

Flatfielding is accomplished through automatic calibration images called _____ and _____.

Accepted Answer

A)  magnification, edge enhancement 
B)  offset images, gain images 
C)  image flip, image lag 
D)  image inversion, pixel shift 
A)  magnification, edge enhancement 
B)  offset images, gain images 
C)  image flip, image lag 
D)  image inversion, pixel shift

Question 10

Compared to CRTs,AMLCDs have _____.

Accepted Answer

A)  better contrast 
B)  better gray scale definition 
C)  less intrinsic noise 
D)  all of the above 
A)  better contrast 
B)  better gray scale definition 
C)  less intrinsic noise 
D)  all of the above

Question 11

Almost all digital images in medical imaging are viewed and interpreted on a _____.

Accepted Answer

A)  view box 
B)  CRT device 
C)  digital display device 
D)  television monitor 
A)  view box 
B)  CRT device 
C)  digital display device 
D)  television monitor

Question 12

The decreasing luminous intensity with increasing distance from the source of light follows _____.

Accepted Answer

A)  the law of gravity 
B)  Murphy's law 
C)  cosine law 
D)  the inverse square law 
A)  the law of gravity 
B)  Murphy's law 
C)  cosine law 
D)  the inverse square law

Question 13

Medical flat panel display devices are identified by the _____.

Accepted Answer

A)  aperture ratio 
B)  depth of the monitor 
C)  size of the pixels 
D)  number of pixels 
A)  aperture ratio 
B)  depth of the monitor 
C)  size of the pixels 
D)  number of pixels

Question 14

What is the file size of an image with a 1026 * 1026 matrix and a 2.5 byte gray scale depth?

Accepted Answer

A)  2,565 bits 
B)  1,053 bits 
C)  26 MB 
D)  2.6 MB 
A)  2,565 bits 
B)  1,053 bits 
C)  26 MB 
D)  2.6 MB

Question 15

Text data and email are generated at a _____ workstation in PACS.

Accepted Answer

A)  Radiology Information System (RIS) 
B)  DICOM 
C)  image acquisition 
D)  archive retrieval 
A)  Radiology Information System (RIS) 
B)  DICOM 
C)  image acquisition 
D)  archive retrieval

Question 16

The ambient light at a digital image workstation should be _____.

Accepted Answer

A)  daylight bright 
B)  slightly dimmed 
C)  near darkness 
D)  complete darkness 
A)  daylight bright 
B)  slightly dimmed 
C)  near darkness 
D)  complete darkness

Question 17

Which is not a part of PACS?

Accepted Answer

A)  film storage 
B)  a display system 
C)  a network 
D)  image acquisition 
A)  film storage 
B)  a display system 
C)  a network 
D)  image acquisition

Question 18

The science of _____ is the study of the response of the human eye to light.

Accepted Answer

A)  physiology 
B)  optometry 
C)  photometry 
D)  ophthalmology 
A)  physiology 
B)  optometry 
C)  photometry 
D)  ophthalmology

Question 19

Within a PACS network the secretarial workstation and the viewing workstation would both be called _____.

Accepted Answer

A)  mainframes 
B)  remote devices 
C)  clients 
D)  DICOMs 
A)  mainframes 
B)  remote devices 
C)  clients 
D)  DICOMs

Question 20

Preprocessing the digital image is done _____,and post-processing is done _____.

Accepted Answer

A)  automatically, manually 
B)  manually, manually 
C)  manually, automatically 
D)  automatically, automatically 
A)  automatically, manually 
B)  manually, manually 
C)  manually, automatically 
D)  automatically, automatically

Exam 18: Viewing the Digital Radiographic Image

What is the basic photometric unit?

The national standard for image transmission in teleradiology is the _____ format.

_____ is corrected by the application of an offset voltage.

A digital display monitor is best viewed _____.

A liquid crystal is a material in a _____ state.

PACS stands for _____.

Reregistering an image to correct for patient motion is done with _____.

A computation of the mean pixel value within a region-of-interest is performed for _____.

Flatfielding is accomplished through automatic calibration images called _____ and _____.

Compared to CRTs,AMLCDs have _____.

Almost all digital images in medical imaging are viewed and interpreted on a _____.

The decreasing luminous intensity with increasing distance from the source of light follows _____.

Medical flat panel display devices are identified by the _____.

What is the file size of an image with a 1026 * 1026 matrix and a 2.5 byte gray scale depth?

Text data and email are generated at a _____ workstation in PACS.

The ambient light at a digital image workstation should be _____.

Which is not a part of PACS?

The science of _____ is the study of the response of the human eye to light.

Within a PACS network the secretarial workstation and the viewing workstation would both be called _____.

Preprocessing the digital image is done _____,and post-processing is done _____.

Essential Concepts of Radiologic Science

The Structure of Matter

Electromagnetic Energy

Electricity, Magnetism, and Electromagnetism

The X-ray Imaging System

The X-ray Tube

X-ray Production

X-ray Emission

X-ray Interaction with Matter

Concepts of Radiographic Image Quality

Control of Scatter Radiation

Screen-Film Radiography

Screen-Film Radiographic Technique

Computers in Medical Imaging

Computed Radiography

Digital Radiography

Digital Radiographic Technique

Screen-Film Radiographic Artifacts

Screen-Film Radiographic Quality Control

Digital Radiographic Artifacts

Digital Radiographic Quality Control

Mammography

Mammography Quality Control

Fluoroscopy

Digital Fluoroscopy

Interventional Radiography

Computed Tomography

Human Biology

Fundamental Principles of Radiobiology

Molecular Radiobiology

Cellular Radiobiology

Deterministic Effects of Radiation

Stochastic Effects of Radiation

Health Physics

Designing for Radiation Protection

Patient Radiation Dose Management

Occupational Radiation Dose Management

Filters

Flatfielding is accomplished through automatic calibration images called _ and _.

Preprocessing the digital image is done _,and post-processing is done _.