Help
Options
Question
List two types of distortion
click to flip
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't know
Question
What measurement is used to express recorded detail?
Remaining cards (29)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Radt 456
ARRT registry review covering image acquisition and evaluation
| Question | Answer |
|---|---|
| List two types of distortion | Size (magnification) Shape (elongation/foreshortening) |
| What measurement is used to express recorded detail? | lp/mm |
| What will an increase in OID do to magnification? | Increase it |
| What type of relationship does focal spot size have with recorded detail? | Inverse |
| List two ways to minimize voluntary motion | Good communication Suspend respiration |
| List three ways to minimize involuntary motion | Short exposure time Support and stabilization Immobilization devices |
| What happens to recorded detail as phospher size increases? | Decreases |
| What is the term form luminescence that lingers after x-ray is terminated? | Afterglow |
| What type of relationship does mAs have with density? | Direct |
| What type of relationship does kVp have with contrast | Inverse |
| What is the conversion factor for an 8:1 grid? | 4 |
| How much of a change in mAs is necessary to create a noticeable change in density? | 30% |
| What is the primary goal of filtration? | reduce patient dose |
| What is grid frequency? | Number of lead strips per inch |
| Anode heel effect creates greater intensity at which end of the beam? | Cathode |
| What happens to optical density as developer temperature increases? | Increases |
| High contrast is what type of scale? | Short |
| What does short scale contrast do to film latitude? | Decreases it |
| What type of relationship does kVp have with scatter radiation? | Direct |
| What is the primary function of a grid? | Absorbs scatter radiation before it reaches IR |
| Base plus fog should account for no more than this much density | 0.2 |
| Name the two types of AEC's | Phototimer and Ionization Chamber |
| What type of relationship does SID have with magnification? | Inverse |
| What effect does an increase in focal spot size have on recorded detail? | Decreases it |
| List three rare earth phosphers | Gadolinium, Lanthanum and Yttrium |
| A phosphor's ability to absorb x-ray energy and convert it to fluorescent light energy is known as what? | Conversion efficiency |
| What effect does the use of an intensifying screen have on patient dose? | Decreases it |
| What term describes the amount of blackness on an image? | Density |
| As thickness and density of a tissue increases, what happens to the production of scattered radiation? | Increases |
| Additive type disease processes will cause what effect on density? | Decrease it |
Created by:
jaminton
Popular Radiology sets