TCDHA Rad Theory FINAL UPDATED
Exam Questions and CORRECT Answers
First invented Xrays - Correct Answer- Wilhelm Conrad Roetgen 1895
Classifications of ionizing radiation - Correct Answer- electromagnetic, particulate
electromagnetic radiation - Correct Answer- man made or occurs naturally, possesses no mass
Particulate radiation - Correct Answer- tiny particles of matter that possess mass and travel in
straight lines and at high speeds
Tube head is immersed in - Correct Answer- oil, to provide electrical insulation and dispense
of heat
Cathode - Correct Answer- negative charge terminal made of tungsten
anode - Correct Answer- postive charge terminal made of copper
Cones - Correct Answer- 8 or 16 inches
Collimator - Correct Answer- Lead disk to restrict the size of the beam
High mA produces - Correct Answer- lighter image
Low kVp produces - Correct Answer- High contrast
transformers - Correct Answer- A device that increases or decreases the voltage of an
electrical current
Compton scattering - Correct Answer- 62 percent
, Roentgen does not have a _____________ - Correct Answer- SI equivalent
Paralelling technique advantages - Correct Answer- accurate, simple, standardized
paralelling technique disadvantages - Correct Answer- film placement, discomfort
increased target receptor distance - Correct Answer- avoids magnification
central ray is _____degrees to receptor - Correct Answer- 90
if the lack of parallelism is _______ the image is acceptable - Correct Answer- less than 20
central ray is _______degrees to tooth surface - Correct Answer- +10
Radiolucent - Correct Answer- appears dark
radiopaque - Correct Answer- appears light
airspace - Correct Answer- black space between teeth
Xray film layers - Correct Answer- film base, adhesive layer, film emulsion, protective layer
what is the thickest layer of xray film? - Correct Answer- base
components of film emulsion - Correct Answer- gelatin and silver halide crystals
latent image - Correct Answer- remains invisible until the film is processed
extraoral films - Correct Answer- panoramic and cephalometric
Exam Questions and CORRECT Answers
First invented Xrays - Correct Answer- Wilhelm Conrad Roetgen 1895
Classifications of ionizing radiation - Correct Answer- electromagnetic, particulate
electromagnetic radiation - Correct Answer- man made or occurs naturally, possesses no mass
Particulate radiation - Correct Answer- tiny particles of matter that possess mass and travel in
straight lines and at high speeds
Tube head is immersed in - Correct Answer- oil, to provide electrical insulation and dispense
of heat
Cathode - Correct Answer- negative charge terminal made of tungsten
anode - Correct Answer- postive charge terminal made of copper
Cones - Correct Answer- 8 or 16 inches
Collimator - Correct Answer- Lead disk to restrict the size of the beam
High mA produces - Correct Answer- lighter image
Low kVp produces - Correct Answer- High contrast
transformers - Correct Answer- A device that increases or decreases the voltage of an
electrical current
Compton scattering - Correct Answer- 62 percent
, Roentgen does not have a _____________ - Correct Answer- SI equivalent
Paralelling technique advantages - Correct Answer- accurate, simple, standardized
paralelling technique disadvantages - Correct Answer- film placement, discomfort
increased target receptor distance - Correct Answer- avoids magnification
central ray is _____degrees to receptor - Correct Answer- 90
if the lack of parallelism is _______ the image is acceptable - Correct Answer- less than 20
central ray is _______degrees to tooth surface - Correct Answer- +10
Radiolucent - Correct Answer- appears dark
radiopaque - Correct Answer- appears light
airspace - Correct Answer- black space between teeth
Xray film layers - Correct Answer- film base, adhesive layer, film emulsion, protective layer
what is the thickest layer of xray film? - Correct Answer- base
components of film emulsion - Correct Answer- gelatin and silver halide crystals
latent image - Correct Answer- remains invisible until the film is processed
extraoral films - Correct Answer- panoramic and cephalometric
