Dental radiology Study Guide Questions with Correct Answers
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Course
Dental radiology
Institution
Dental Radiology
Dental radiology Study Guide Questions with Correct Answers
A unit measuring ionization in the air is known as - Answer-Coulomb per kilogram
A unit measuring the effect of X rays on the tissues is defined as - Answer-Rem
X rays originate when components in the X-ray tube are heated and free ...
Dental radiology Study Guide
Questions with Correct Answers
A unit measuring ionization in the air is known as - Answer-Coulomb per kilogram
A unit measuring the effect of X rays on the tissues is defined as - Answer-Rem
X rays originate when components in the X-ray tube are heated and free electrons are
propelled at high speed toward the - Answer-Tungsten target
Dense structures such as bone and enamel - Answer-Absorb more X- rays
Appears radiopaque
Within the X-Ray tube , converted energy produces - Answer-99 % heat and 1 % X-rays
The electrical circuits of the X-Ray machine includes the - Answer-Filament Circuit Low
voltage
Cathode-anode Circuit High voltage
The electric current flows through the filament circuit and heat the - Answer-Cathode
filament
The positive terminal or electrode in an electric circuit is the - Answer-Anode
Thermionic emission is created by a - Answer-Filament wire heated to incandescence
A tungsten target insect into copper is located in the _ of the Coolidge tube - Answer-
Anode
The sharpness or definition of the radiograph is determined by the - Answer-Focal spot
Within the X ray machine the direction of electric current flows from the - Answer-
Filament of the cathode to the target of the anode
The amperage control determines the - Answer-Number of free electrons at the cathode
filament
When the amperage is increased on the master control unit , the amount of radiation
produced will - Answer-Increase
, The highest voltage to which the current in the tube rises during an exposure is called -
Answer-Kilo-voltage peak
Transformer - Answer-An electromagnetic device that initiates the electrical current for
the production of X rays
Position indicating device - Answer-An open ended extension that is attached to the X-
ray tube head
Filter - Answer-Utilized to screen out long wavelengths. It is constructed of aluminum
Collimator - Answer-A lead disk that limits the size of the X-rat beam to 2.75 inches
Anode - Answer-The positive pole in the Coolidge tube
Primary beam - Answer-The X-rays that are emitted from the position indicating device
Aperture - Answer-A round opening in the collimator
Cathode - Answer-A negative pole in the Coolidge tube
Central beam - Answer-The middle portion of the useful beam
Tungsten target - Answer-Located on the anode. It is approximately 1 millimeter in size
and it contains the focal spot
Professor Wilhelm Roentgen - Answer-Discovered the x rays
Digital radiography utilizes the following approach - Answer-Filmless radiographic
computer imaging system
A form of energy is - Answer-Heat , Light , Electricity , X radiation
Photons are described as - Answer-Bundles of energy
Limited penetration long-wavelength radiation is known as - Answer-Soft radiation
Background radiation originates from - Answer-Environment , Outer space ,
Radionuclides , Terrestrial Radiation
Ionizing radiation produces ions when - Answer-Radiation passes through body tissues
Common characteristics of radiation are - Answer-Wavelengths that determine the
penetrating power
Forms of electromagnetic radiation
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