Dental Radiography Chapter 3
Questions and Answers Already Passed
What is the main purpose of the focusing cup in the X-ray tube?
a) To filter X-rays
b) To control scatter radiation
✔✔c) To direct electrons to the anode
d) To adjust the exposure time
What is the effect of increasing mA on the density of a radiograph?
a) It decreases density
b) It increases contrast
✔✔c) It increases density
d) It decreases resolution
Which X-ray interaction is most significant in dental radiography?
a) Photoelectric effect
b) Compton scatter
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,✔✔c) Both photoelectric effect and Compton scatter
d) Coherent scatter
What happens to the X-ray beam when a thicker body part is being imaged?
a) The beam intensity increases
✔✔b) The beam is attenuated more
c) The exposure time decreases
d) The image contrast improves
What is the advantage of using digital radiography over traditional film?
✔✔a) Reduced radiation dose
b) Higher exposure times
c) Increased scatter radiation
d) More film processing steps
What is the role of silver halide crystals in radiographic film?
✔✔a) To capture and store the latent image
b) To filter scatter radiation
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, c) To focus the X-ray beam
d) To enhance film sharpness
What is the standard unit for measuring radiation exposure?
✔✔a) Roentgen
b) Sievert
c) Gray
d) Becquerel
What type of radiograph is commonly used to assess tooth decay?
✔✔a) Bitewing
b) Periapical
c) Panoramic
d) Occlusal
What is the purpose of the emulsion layer on radiographic film?
✔✔a) To hold silver halide crystals for image formation
b) To protect the film from light exposure
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Questions and Answers Already Passed
What is the main purpose of the focusing cup in the X-ray tube?
a) To filter X-rays
b) To control scatter radiation
✔✔c) To direct electrons to the anode
d) To adjust the exposure time
What is the effect of increasing mA on the density of a radiograph?
a) It decreases density
b) It increases contrast
✔✔c) It increases density
d) It decreases resolution
Which X-ray interaction is most significant in dental radiography?
a) Photoelectric effect
b) Compton scatter
1
,✔✔c) Both photoelectric effect and Compton scatter
d) Coherent scatter
What happens to the X-ray beam when a thicker body part is being imaged?
a) The beam intensity increases
✔✔b) The beam is attenuated more
c) The exposure time decreases
d) The image contrast improves
What is the advantage of using digital radiography over traditional film?
✔✔a) Reduced radiation dose
b) Higher exposure times
c) Increased scatter radiation
d) More film processing steps
What is the role of silver halide crystals in radiographic film?
✔✔a) To capture and store the latent image
b) To filter scatter radiation
2
, c) To focus the X-ray beam
d) To enhance film sharpness
What is the standard unit for measuring radiation exposure?
✔✔a) Roentgen
b) Sievert
c) Gray
d) Becquerel
What type of radiograph is commonly used to assess tooth decay?
✔✔a) Bitewing
b) Periapical
c) Panoramic
d) Occlusal
What is the purpose of the emulsion layer on radiographic film?
✔✔a) To hold silver halide crystals for image formation
b) To protect the film from light exposure
3
