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NDAEB Radiology Test Questions with Answers
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NDAEB Radiology Test Questions with Answers Structures that radiation can easily pass through are: - Answer-Radiolucent 3 structures that are radiolucent on an image - Answer-Metal restorations enamel dense areas of bone The range of shades of grey to black to white is called: - Answer-Con...

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  • August 27, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • ndaeb radiology test
  • ndaeb radiology test questions with answers

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NDAEB Radiology Test Questions
with Answers
Structures that radiation can easily pass through are: - Answer-Radiolucent

3 structures that are radiolucent on an image - Answer-Metal restorations
enamel
dense areas of bone

The range of shades of grey to black to white is called: - Answer-Contrast

a 90 kVp setting requires less exposure time and produces an image that has: -
Answer-Low contrast

A 70 kVp setting requires longer exposure time and produces an image with: - Answer-
High contrast

What is density: - Answer-The overall blackness or darkness of a film.

An image with correct density allows the dentist to view: - Answer-Air spaces
Abscesses
White areas(tooth structure)
Gray areas (soft tissues)

The density is controlled by: - Answer-mAs

The mAs controls: - Answer-the amount of time given to exposure of the image

If exposure time is too short or a low milliampere (mA) setting is used, the resulting
image will: - Answer-will not have the correct overall density and appear light.

Factors that effect density of an image: - Answer-1. Distance from the xray tube to the
patient
2. Developing time and temp
3. Body size of the pt

Three geometric characteristics that affect the quality of an image: - Answer-Sharpness-
refers to detail, resolution, definition
Distortion- refers to the disproportionate change due to -/+ vertical angulation called,
Elongation and Foreshortening
Magnification-refers to the proportionate enlargement of a dental image

, Factors that affect contrast - Answer-kVp, Beam restriction, Grid, Processing, Filtration,
OID, Patient, Film

The sharpness of an image depends on: - Answer-Focal spot size
Film composition
Movement

Ionizing radiation - Answer-harmful and produces biologic changes in living tissues

Ionization causes: - Answer--disruption in cellular metabolism
- permanent damage to living cells and tissues

cells - tissues- organs- organ systems

What is the latent period? - Answer-The amount of time that elapses between exposure
to ionizing radiation and the appearance of observable clinical signs of tissue damage

When a large dose of radiation is absorbed in a short period, such as a nuclear accident
this is referred to as? - Answer-Acute radiation exposure

When small amounts of radiation is absorbed repeatedly over a long period of time and
the effects may not be abserved until years after the original exposure, this is referred to
as: - Answer-Chronic Radiation exposure

Who discovered xrays: - Answer-Wilhelm Conrad Roentgen

All xray machines have three primary components: - Answer-Tubehead
Extension arm
Control panel

The housing - Answer-metal body that contains the xray tube

Insulating oil - Answer-Fills the housing and surrounds the xray tube. Prevents
overheating by absorbing the heat

The tubehead seal - Answer-made of leaded glass or aluminum and it keeps the oil in
the tubehead and acts as a filter to the x-ray beam.

Xray beam - Answer-where xrays are produced

Transformer - Answer-device that alters the voltage of incoming electricity

PID - Answer-lead lined, used to aim xray beam at the film in patients mouth

Xray Tube - Answer-heart of the xray generating system

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