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RAD100 chapter 7
chapter 7
| Question | Answer |
|---|---|
| In a digital system, what would happen if the mAs is not high enough? | The image would have quantum mottle and appear grainy |
| Which of the following technique combinations will produce approximately the same receptor exposure as 70 kVp at 10 mAs? | 60 kVp @ 20 mAs |
| The ability of a digital system to display subtle changes in shades of gray is called | contrast resolution. |
| What qualities of a material affect its ability to absorb x-rays? | density, atomic number, thickness |
| What are the 4 requirements to produce x-rays? | A vacuum sealed environment, a sources of electrons, a method to accelerate the electrons, and a way to stop them quickly |
| __________________ is a term used to evaluate accuracy of the anatomic structural lines recorded. | Spatial resolution |
| In a digital system, what would happen if the mAs is WAY too high? | The image would be too dark to see detail, called saturation |
| The kVp selected on the x-ray console represents which of the following? | The maximum energy of photons produced in the x-ray beam |
| Which of the following BEST expresses the relationship between mAs and receptor exposure? | mAs and exposure are directly proportional. As mAs goes up, exposure goes up by the same factor. |
| Given a technique of 60 kVp at 16 mAs produces proper image receptor exposure, which technique would maintain the same IR exposure while decreasing the kVp? | 51 kVp @ 32 mAs |
| What allows us to visualize different body parts in an image? | Differential absorption |
| Visibility of the anatomic structures is accomplished by balancing | Brightness and Contrast |
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