Question 1

The capability of an image intensifier to increase the illumination level of the image is called its _____________________.

Accepted Answer

A)  flux gain 
B)  conversion factor 
C)  brightness gain 
D)  veiling glare 
A)  flux gain 
B)  conversion factor 
C)  brightness gain 
D)  veiling glare

Question 2

The number of light photons emitted within the image intensifier is ____________ to the amount of x-ray photons exiting the patient.

Accepted Answer

A)  equal 
B)  unrelated 
C)  inversely proportional 
D)  directly proportional 
A)  equal 
B)  unrelated 
C)  inversely proportional 
D)  directly proportional

Question 3

Light produced at the output phosphor of the image intensifier has been increased __________ times in intensity.

Accepted Answer

A)  5-10 
B)  20-35 
C)  50-75 
D)  100-300 
A)  5-10 
B)  20-35 
C)  50-75 
D)  100-300

Question 4

The _______ in the retina are stimulated by _______ light; the _______ are stimulated by _______ light.

Accepted Answer

A)  rods, bright; cones, low 
B)  rods, low; cones, low 
C)  rods, low; cones, bright 
D)  rods, bright; cones, bright 
A)  rods, bright; cones, low 
B)  rods, low; cones, low 
C)  rods, low; cones, bright 
D)  rods, bright; cones, bright

Question 5

Automatic brightness control (ABC) maintains the brightness of the image by varying ___________________.

Accepted Answer

A)  monitor settings 
B)  kVp and mA 
C)  monitor bandwidth 
D)  All of the above 
A)  monitor settings 
B)  kVp and mA 
C)  monitor bandwidth 
D)  All of the above

Exam 25: Fluoroscopy

The capability of an image intensifier to increase the illumination level of the image is called its _____________________.

The number of light photons emitted within the image intensifier is ____________ to the amount of x-ray photons exiting the patient.

Light produced at the output phosphor of the image intensifier has been increased __________ times in intensity.

The _______ in the retina are stimulated by _______ light; the _______ are stimulated by _______ light.

Automatic brightness control (ABC) maintains the brightness of the image by varying ___________________.

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

Radiographic Image Quality

Control of Scatter Radiation

Screen-Film Radiography

Screen-Film Radiographic Technique

Medical Imaging Computer Science

Computed Radiography

Digital Radiography

Digital Radiographic Technique

Viewing the Digital Image

Screen-Film Radiographic Artifacts

Screen-Film Radiographic Quality Control

Digital Radiographic Artifacts

Digital Radiographic Quality Control

Mammography

Mammography Quality Control

Digital Fluoroscopy

Interventional Radiology

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

Radiography/Fluoroscopy Patient Radiation Dose

Computed Tomography Patient Radiation Dose

Patient Radiation Dose Management

Occupational Radiation Dose Management

Filters

The ___ in the retina are stimulated by _ light; the _ are stimulated by ___ light.