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chapter 3 quiz
| Question | Answer |
|---|---|
| In dental imaging, the quality of the x-ray beam is controlled by: | kilovoltage |
| Identify the kilovoltage range for current dental x-ray machines: | 60 to 70 kV |
| A higher kilovoltage produces x-rays with: | all of the above |
| Identify the unit of measurement used to describe the amount of electric current flowing through the x-ray tube: | ampere |
| Radiation produced with high kilovoltage results in: | short wavelengths |
| In dental imaging, the quantity of radiation produced is controlled by: | milliamperage and exposure time |
| Increasing milliamperage results in an increase in: | temperature of the filament and number of x-rays produced |
| Identify the milliamperage range used for current dental x-ray machines: | 9 to 15 mA |
| The overall blackness or darkness of an image is termed: | density |
| If kilovoltage is decreased with no other variations in exposure factors, the resultant image will: | Decreasing kilovoltage results in less penetrating radiation, leading to a lighter (underexposed) image |
| Identify the term that describes how dark and light areas are differentiated on an image: | contrast |
| An image that has many light and dark areas with few shades of gray is said to have: | high contrast |
| The image described in question 12 was produced with: | low kilovoltage |
| Increasing milliamperage alone results in an image with: | increased density |
| The total energy contained in the x-ray beam in a specific area at a given time is termed: | intensity |
| ncreasing which of these four exposure controls will increase the intensity of the x-ray beam: (1) kilovoltage, (2) milliamperage, (3) exposure time, (4) source-to-receptor distance? | 1, 2, and 3 |
| If the target-receptor distance is doubled, the resultant beam will be: | one fourth as intense |
| If the target-receptor distance is tripled, the resultant beam will be: | one ninth as intense |
| The half-value layer is the amount of: | aluminum needed to reduce x-ray beam intensity by half |
| If the half-value layer is 3 mm, what thickness of aluminum is necessary to decrease the intensity by half? | . 3 mm |
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