Image acquisition and evaluation review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Density (brightness) | show 🗑
|
||||
| show | quantity of xrays produced
🗑
|
||||
| show | the energy or quality of xrays produced
🗑
|
||||
| Contrast | show 🗑
|
||||
| show | darkness on a radiograph
🗑
|
||||
| the radiographic image is formed by: | show 🗑
|
||||
| show | mAs and window level
🗑
|
||||
| show | density is directly proportional to mAs
🗑
|
||||
| the number of electrons boiled off the cathode and consequently the number of xrays produced are controlled by: | show 🗑
|
||||
| the law stating that any combinations of mA and time that produce the same mAs value will produce the same radiographic density is the: | show 🗑
|
||||
| the active portion of a CR IP is: | show 🗑
|
||||
| show | kVp and window width
🗑
|
||||
| show | direct, although not proportional
🗑
|
||||
| the 15% rule states that: | show 🗑
|
||||
| what governs the relationship between SID and density? | show 🗑
|
||||
| if SID is doubled, what may be said about radiographic density? | show 🗑
|
||||
| if SID is reduced by one-half, what must done to mAs to maintain a constant density? | show 🗑
|
||||
| What can cause poor recorded detail? | show 🗑
|
||||
| in digital fluoroscopy, what equipment should be used to view the image? | show 🗑
|
||||
| show | postprocessing manipulation of the image
🗑
|
||||
| which of the following describes the relationship between radiographic density and the use of grids? | show 🗑
|
||||
| the use of filtration: | show 🗑
|
||||
| show | density decrease
🗑
|
||||
| show | anode heel effect
🗑
|
||||
| show | cathode
🗑
|
||||
| the function of contrast is to: | show 🗑
|
||||
| a radiograph with few gray tones, primarily exhibiting black and white, would be described as having what type of contrast? | show 🗑
|
||||
| show | pixel pitch wide
🗑
|
||||
| show | low contrast, long scale, many gray tones
🗑
|
||||
| show | high contrast, short scale, few gray tones
🗑
|
||||
| more uniform penetration of anatomical structures occurs when what level of kVp is used? | show 🗑
|
||||
| differential absorption of the xray beam is a function of: | show 🗑
|
||||
| What effect does beam restriction have on contrast? | show 🗑
|
||||
| show | increase mAs to compensate for the number of rays removed from the primary beam
🗑
|
||||
| what effect does the use of radiographic grids have on contrast? | show 🗑
|
||||
| as the amount of beam filtration is increased: | show 🗑
|
||||
| the portion of contrast that is caused by variations in the anatomy or is secondary to pathological changes is called: | show 🗑
|
||||
| recorded detail is: | show 🗑
|
||||
| better recorded detail may be caused by what? | show 🗑
|
||||
| optimal recorded detail may be created using what? | show 🗑
|
||||
| elongation and foreshortening are examples of: | show 🗑
|
||||
| show | short SID, long OID
🗑
|
||||
| distortion that occurs when the xray beam is angled against the long axis of a part is: | show 🗑
|
||||
| distortion that occurs when the xray beam is angled along the long axis of a part is: | show 🗑
|
||||
| the actual patient dose as measured by a meter embedded in the collimator is: | show 🗑
|
||||
| show | every 3 months
🗑
|
||||
| show | daily
🗑
|
||||
| quality assurance of digital imaging requires the uniformity of processing codes to ensure: | show 🗑
|
||||
| a software function that evens the brightness displayed in the image called: | show 🗑
|
||||
| show | the latitude of collimation that still allows the software to detect collimated edges
🗑
|
||||
| exposure technique in digital imaging may be adjusted by: | show 🗑
|
||||
| show | scatter and background radiation
🗑
|
||||
| inappropriate collimation causes: | show 🗑
|
||||
| show | edge enhancement
🗑
|
||||
| show | the likelihood of noise increases
🗑
|
||||
| smoothing software may result in: | show 🗑
|
||||
| show | degrade visibility of anatomy
🗑
|
||||
| show | higher spatial resolution
🗑
|
||||
| show | detail
🗑
|
||||
| show | the ratio of the height of the lead strips over the distance between the lead strips
🗑
|
||||
| show | the amount of lead in the grid (expressed as the # of lead strips per inch)
🗑
|
||||
| show | focused grid
🗑
|
||||
| the range of SIDs that may be used with a focused grid is called: | show 🗑
|
||||
| show | crosshatch grids
🗑
|
||||
| show | decreased density on a radiograph as a result of absorption of image forming rays
🗑
|
||||
| show | works because scatter radiation travels in divergent paths and misses the IR as a result of increased OID
🗑
|
||||
| materials that make flat panel detectors possible are: | show 🗑
|
||||
| Which of the following maintains image brightness over a wide range of exposures? | show 🗑
|
||||
| show | bit depth
🗑
|
||||
| the smallest exposure change able to be captured by a detector is called: | show 🗑
|
||||
| an indicator of the dose level needed to acquire an optimal image is: | show 🗑
|
||||
| the useful image acquisition area of an image receptor is: | show 🗑
|
||||
| the smallest resolvable area in a digital imaging device is: | show 🗑
|
||||
| what allows more anatomical structures to be captured during an exposure? | show 🗑
|
||||
| show | exposure latitude
🗑
|
||||
| show | histogram
🗑
|
||||
| undesirable fluctuations in brightness are called: | show 🗑
|
||||
| show | matrix size
🗑
|
||||
| show | modulation transfer function (MTF)
🗑
|
||||
| show | nyquist frequency
🗑
|
||||
| show | photodiode
🗑
|
||||
| the smallest area represented in a digital image is the: | show 🗑
|
||||
| the number of pixels/mm in an image is called: | show 🗑
|
||||
| show | pixel pitch
🗑
|
||||
| show | quantization
🗑
|
||||
| show | scintillator
🗑
|
||||
| bit depth is equal to: | show 🗑
|
||||
| show | the amount of radiation striking the image receptor
🗑
|
||||
| show | to see a difference in density, the mAs must change at least 30%
🗑
|
||||
| filtration effect on contrast? | show 🗑
|
||||
| collimation effect on contrast? | show 🗑
|
||||
| units of spatial resolution? | show 🗑
|
||||
| show | increase 15 kVp
🗑
|
||||
| show | increase 10 kVp
🗑
|
||||
| show | increase 5 kVp
🗑
|
||||
| what technical factors should be used for iodinated contrast? | show 🗑
|
||||
| show | not over 100 kVp
🗑
|
||||
| whats the order of film development? | show 🗑
|
||||
| where do most processor problems with film occur? | show 🗑
|
||||
| what temperature should the developer be? | show 🗑
|
||||
| the faster the speed of the screen? | show 🗑
|
||||
| where is the micro switch located that controls replenishment | show 🗑
|
||||
| show | increase collimation=decrease in density
🗑
|
||||
| show | 36"
🗑
|
||||
| does mAs go up or down for a higher grid ratio? | show 🗑
|
||||
| show | increase mAs=increase density
🗑
|
||||
| show | increase kVp=increase density
🗑
|
||||
| SID effect on density? | show 🗑
|
||||
| grid ratio effect on density? | show 🗑
|
||||
| filitration effect on density? | show 🗑
|
||||
| show | increase anode heel effect=decrease density
🗑
|
||||
| show | increase factors=decrease density
🗑
|
||||
| kVp effect on contrast? | show 🗑
|
||||
| OID effect on contrast? | show 🗑
|
||||
| show | increase grid ratio=increase contrast
🗑
|
||||
| patient factors on contrast? | show 🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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
Created by:
Chrslarsen
Popular Radiology sets