Question 1

Which of the following statements about scintillators is true?

Accepted Answer

A)  All scintillators absorb the same amount of x-ray photons. 
B)  The amount of x-rays absorbed depends on the type of scintillator. 
C)  Structured phosphors produce more light spread. 
D)  Unstructured phosphors are more efficient. 
A)  All scintillators absorb the same amount of x-ray photons. 
B)  The amount of x-rays absorbed depends on the type of scintillator. 
C)  Structured phosphors produce more light spread. 
D)  Unstructured phosphors are more efficient. B

Question 2

Demagnification is

Accepted Answer

A)  reducing the phosphor output image to the size of the active area of the CCD. 
B)  reducing the field size of the CCD detector. 
C)  reducing the amount of light spread from the scintillator. 
D)  None of the above 
A)  reducing the phosphor output image to the size of the active area of the CCD. 
B)  reducing the field size of the CCD detector. 
C)  reducing the amount of light spread from the scintillator. 
D)  None of the above A

Question 3

All of the following are considered impurities except

Accepted Answer

A)  gallium arsenide. 
B)  indium antimonide. 
C)  tellurium. 
D)  most metal oxides. 
A)  gallium arsenide. 
B)  indium antimonide. 
C)  tellurium. 
D)  most metal oxides. C

Question 4

When specialized pixels in a complementary metal oxide silicon system are struck with x-ray photons

Accepted Answer

A)  the x-ray photons are converted into light. 
B)  light photons are stored in capacitors. 
C)  light photons are converted into electrical charges. 
D)  All of the above 
A)  the x-ray photons are converted into light. 
B)  light photons are stored in capacitors. 
C)  light photons are converted into electrical charges. 
D)  All of the above

Question 5

CCDs use more power than CMOS.

Accepted Answer

A) True 
 B)False

Question 6

A detector in which each pixel has its own amplifier is known as a

Accepted Answer

A)  CCD. 
B)  field-effect transistor. 
C)  CMOS. 
D)  thin-field transistor. 
A)  CCD. 
B)  field-effect transistor. 
C)  CMOS. 
D)  thin-field transistor.

Question 7

A highly efficient indirect conversion system that takes up less fill space than CCDs is known as a(n)

Accepted Answer

A)  analog to digital converter. 
B)  field-effect transistor. 
C)  CMOS. 
D)  thin-field transistor. 
A)  analog to digital converter. 
B)  field-effect transistor. 
C)  CMOS. 
D)  thin-field transistor.

Question 8

The components that focus the signal from the scintillators to the CCD are called

Accepted Answer

A)  detector elements. 
B)  capacitors. 
C)  fiber optics. 
D)  analog-digital converters. 
A)  detector elements. 
B)  capacitors. 
C)  fiber optics. 
D)  analog-digital converters.

Question 9

The indirect conversion detector system that requires optical coupling and image size reduction is known as a

Accepted Answer

A)  CCD. 
B)  field-effect transistor. 
C)  CMOS. 
D)  thin-field transistor. 
A)  CCD. 
B)  field-effect transistor. 
C)  CMOS. 
D)  thin-field transistor.

Question 10

The number of electron-hole pairs produced is related to the amount of light absorbed.

Accepted Answer

A) True 
 B)False

Question 11

Some advantages to CCDs include

Accepted Answer

A)  less expensive to manufacture. 
B)  module design makes repairs and upgrades easy. 
C)  demagnification capabilities. 
D)  a and c only. 
E)  All of the above 
A)  less expensive to manufacture. 
B)  module design makes repairs and upgrades easy. 
C)  demagnification capabilities. 
D)  a and c only. 
E)  All of the above

Question 12

The readout process requires that _______ and _______.

Accepted Answer

A)  electrons flow freely when the gates are open;voltage stays consistent 
B)  the flow of electrons is timed;voltage stays consistent 
C)  electrons flow freely when the gates are open;multiple voltage changes occur 
D)  the flow of electrons is timed;multiple voltage changes occur 
A)  electrons flow freely when the gates are open;voltage stays consistent 
B)  the flow of electrons is timed;voltage stays consistent 
C)  electrons flow freely when the gates are open;multiple voltage changes occur 
D)  the flow of electrons is timed;multiple voltage changes occur

Question 13

Quantum efficiency is a measurement of the

Accepted Answer

A)  amount of electron-hole pairs held by the electrostatic force. 
B)  percentage of light that is absorbed. 
C)  amount of electrons produced relative to the incident light from the scintillator. 
D)  total amount of light that is absorbed. 
A)  amount of electron-hole pairs held by the electrostatic force. 
B)  percentage of light that is absorbed. 
C)  amount of electrons produced relative to the incident light from the scintillator. 
D)  total amount of light that is absorbed.

Question 14

When compared with a CMOS,CCDs

Accepted Answer

A)  are less light sensitive. 
B)  are more susceptible to noise. 
C)  use more than 100 times the power. 
D)  are inexpensive to manufacture. 
A)  are less light sensitive. 
B)  are more susceptible to noise. 
C)  use more than 100 times the power. 
D)  are inexpensive to manufacture.

Question 15

The most common types of noise that affects image quality include all of the following except

Accepted Answer

A)  quantum noise. 
B)  statistical noise. 
C)  "dark" current noise. 
D)  amplification noise. 
A)  quantum noise. 
B)  statistical noise. 
C)  "dark" current noise. 
D)  amplification noise.

Question 16

Which statement best describes a capacitor?

Accepted Answer

A)  It converts x-ray photons to light. 
B)  It converts light to an electrical charge and stores it. 
C)  It converts x-ray photons to light and stores it. 
D)  It stores light and converts it from an analog to a digital signal. 
A)  It converts x-ray photons to light. 
B)  It converts light to an electrical charge and stores it. 
C)  It converts x-ray photons to light and stores it. 
D)  It stores light and converts it from an analog to a digital signal.

Question 17

Which statement best describes a charge-coupled device (CCD)?

Accepted Answer

A)  It is the oldest direct conversion technology that is still in use today. 
B)  It is the oldest direct conversion technology with limited use today. 
C)  It is the oldest indirect conversion technology that is no longer used in medical imaging. 
D)  It is the oldest indirect conversion technology used in a variety of image capture applications. 
A)  It is the oldest direct conversion technology that is still in use today. 
B)  It is the oldest direct conversion technology with limited use today. 
C)  It is the oldest indirect conversion technology that is no longer used in medical imaging. 
D)  It is the oldest indirect conversion technology used in a variety of image capture applications.

Question 18

The most popular base material used in integrated circuits is

Accepted Answer

A)  selenium. 
B)  sulfur. 
C)  silicon. 
D)  tellurium. 
A)  selenium. 
B)  sulfur. 
C)  silicon. 
D)  tellurium.

Question 19

A device that acts like a camera in an indirect conversion detector is known as a

Accepted Answer

A)  CCD. 
B)  field-effect transistor. 
C)  CMOS 
D)  thin-field transistor. 
A)  CCD. 
B)  field-effect transistor. 
C)  CMOS 
D)  thin-field transistor.

Question 20

_______ turn semi-conductors into full electrical conductors.

Accepted Answer

A)  Dopants 
B)  Amplifiers 
C)  Positive transistors 
D)  Negative transistors 
A)  Dopants 
B)  Amplifiers 
C)  Positive transistors 
D)  Negative transistors

Which of the following statements about scintillators is true?

Demagnification is

All of the following are considered impurities except

When specialized pixels in a complementary metal oxide silicon system are struck with x-ray photons

CCDs use more power than CMOS.

A detector in which each pixel has its own amplifier is known as a

A highly efficient indirect conversion system that takes up less fill space than CCDs is known as a(n)

The components that focus the signal from the scintillators to the CCD are called

The indirect conversion detector system that requires optical coupling and image size reduction is known as a

The number of electron-hole pairs produced is related to the amount of light absorbed.

Some advantages to CCDs include

The readout process requires that _ and _.

Quantum efficiency is a measurement of the

When compared with a CMOS,CCDs

The most common types of noise that affects image quality include all of the following except

Which statement best describes a capacitor?

Which statement best describes a charge-coupled device (CCD)?

The most popular base material used in integrated circuits is

A device that acts like a camera in an indirect conversion detector is known as a

_______ turn semi-conductors into full electrical conductors.

Introduction to Digital Radiography and Picture Archiving and Communication Systems

Digital Imaging Characteristics

Digital Radiographic Image Processing and Manipulation

Photostimulable Phosphor Image Capture

Thin-Film Transistor Flat-Panel Array Image Acquisition

Basic Computer Principles

Networking and Communication Basics

Picture Archiving and Communication System Fundamentals

Picture Archiving and Communication System Archiving and Peripherals

Medical Informatics

Ensuring Quality in Picture Archiving and Communication Systems

Quality Acceptance Testing Within Digital Projection Imaging

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Exam 6: Charge-Coupled Devicecomplementary Metal Oxide Semiconductor Image Capture

Which of the following statements about scintillators is true?

Demagnification is

All of the following are considered impurities except

When specialized pixels in a complementary metal oxide silicon system are struck with x-ray photons

CCDs use more power than CMOS.

A detector in which each pixel has its own amplifier is known as a

A highly efficient indirect conversion system that takes up less fill space than CCDs is known as a(n)

The components that focus the signal from the scintillators to the CCD are called

The indirect conversion detector system that requires optical coupling and image size reduction is known as a

The number of electron-hole pairs produced is related to the amount of light absorbed.

Some advantages to CCDs include

The readout process requires that _______ and _______.

Quantum efficiency is a measurement of the

When compared with a CMOS,CCDs

The most common types of noise that affects image quality include all of the following except

Which statement best describes a capacitor?

Which statement best describes a charge-coupled device (CCD)?

The most popular base material used in integrated circuits is

A device that acts like a camera in an indirect conversion detector is known as a

_______ turn semi-conductors into full electrical conductors.

Introduction to Digital Radiography and Picture Archiving and Communication Systems

Digital Imaging Characteristics

Digital Radiographic Image Processing and Manipulation

Photostimulable Phosphor Image Capture

Thin-Film Transistor Flat-Panel Array Image Acquisition

Basic Computer Principles

Networking and Communication Basics

Picture Archiving and Communication System Fundamentals

Picture Archiving and Communication System Archiving and Peripherals

Medical Informatics

Ensuring Quality in Picture Archiving and Communication Systems

Quality Acceptance Testing Within Digital Projection Imaging

Filters

The readout process requires that _ and _.