Image Acquisition & Evaluation
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| show | Use of compression devices & close collimation. They both reduce scatter. A low ratio grid cleans up less scatter than a high ratio grid.
🗑
|
||||
| Which of the following methods that help to reduce the PRODUCTION of scattered radiation.....Compression, Beam restriction, Grid use? | show 🗑
|
||||
| show | Increase SID 42"
🗑
|
||||
| Which of the following determines the amount of fluorescent light emitted from a fluorescent screen.....Thickness of the active layer, Type of phosphor used, kV range used for exposure? | show 🗑
|
||||
| show | Retrograde studies do not demonstrate function.
🗑
|
||||
| show | CR cephalad 30–35 degrees
🗑
|
||||
| show | Differential tissue absorption & Emulsion characteristics
🗑
|
||||
| show | The quantity of filtration. Filtration is unrelated to recorded detail.
🗑
|
||||
| show | Beam restriction & grids affect radiographic contrast. Focal spot size affects recorded detail.
🗑
|
||||
| show | Less density.
🗑
|
||||
| All factors remaining the same (SID/OID/kVp/mAs), if a 14 x 17-inch field is collimated to a 4-inch square field, the radiographic image will demonstrate which...higher or lower contrast? Higher or lower density? | show 🗑
|
||||
| show | Less scatter = Higher contrast.
🗑
|
||||
| Are field size & scatter related to recorded detail? | show 🗑
|
||||
| show | Carpal tunnel syndrome
🗑
|
||||
| show | Off focus
🗑
|
||||
| show | All of them. All those pathologic conditions attenuate more of the beam requiring an increase in technical factors to compensate for this.
🗑
|
||||
| show | Lag. Lag occurs when an intensifying screen continues to fluoresce after the x-ray stimulation has terminated. This characteristic is undesirable and causes excessive density.
🗑
|
||||
| show | 0.01
🗑
|
||||
| If a film is placed on an illuminator and 100% of the illuminator's light is transmitted through the film, that film must have a density of what? | show 🗑
|
||||
| show | The gastric fundus
🗑
|
||||
| Recorded detail is directly related to which....SID, tube current, focal-spot size? Which is recorded detail indirectly related? | show 🗑
|
||||
| In the 45-degree medial oblique projection of the ankle, which of the following is correct.....the talotibial joint is visualized tibiofibular joint is visualized plantar surface should be vertical? | show 🗑
|
||||
| Which of the following affects both radiographic density and intensifying screen speed.......Thickness of phosphor layer, Type of phosphors used, Thickness of spongy screen support? | show 🗑
|
||||
| show | At the cathode end
🗑
|
||||
| show | Pixel size & FOV are directly related, as FOV increases, pixel size increases. Resolution & pixel size are inversely related, as pixel size increases, resolution decreases.
🗑
|
||||
| Which of the following may be used to reduce the effect of scattered radiation on the finished radiograph.......Grids, Collimators, Compression bands? | show 🗑
|
||||
| Component part(s) of x-ray film include which of the following......Phosphor layer, Gelatin emulsion, Adhesive layer? | show 🗑
|
||||
| show | To reduce the latent image to the manifest image.
🗑
|
||||
| show | MSP is parallel to tabletop, Pedicles are well visualized, Intervertebral foramina are well visualized, Disk spaces (Intervertebral joints) are well visualized.
🗑
|
||||
| show | Geometric unsharpness will be least obvious at long SID's. Penumbra blur is greatest at the cathode end.
🗑
|
||||
| Cassette front material can be made of which of the following.....Carbon fiber, Magnesium, Lead? | show 🗑
|
||||
| show | Any of them.
🗑
|
||||
| To be suitable for use in intensifying screens, a phosphor should have which of the following characteristics.......High conversion efficiency, High x-ray absorption, High atomic number? | show 🗑
|
||||
| Geometric unsharpness is directly influenced by which of the following.......OID, SOD, SID? Which is it indirectly related to? | show 🗑
|
||||
| show | Differential absorption
🗑
|
||||
| Which of the following will result if developer replenishment is inadequate......Images with excessively high contrast, Images with excessively low contrast, Images with excessively high density, Dry, brittle films? | show 🗑
|
||||
| The amount of replenisher solution added as a film enters the automatic processor is related to which......Size of the film, Temperature of the solution, # of films processed? | show 🗑
|
||||
| If single-emulsion film was loaded into its cassette with the emulsion facing away from the intensifying screen, the resulting image would demonstrate which.....decreased density, increased density, crossover, fog? | show 🗑
|
||||
| show | Decreased mAs, increased kV, fast-speed screens.
🗑
|
||||
| How is SID related to exposure rate and radiographic density? | show 🗑
|
||||
| show | Using high-kV technical factors & Using a low-ratio grid
🗑
|
||||
| Improper spectral matching between rare earth intensifying screens and film emulsion results in which.....Longer-scale contrast, Insufficient density, Decreased recorded detail, Excessive density? | show 🗑
|
||||
| An illness of unknown or obscure cause is said to be what? | show 🗑
|
||||
| What is anything that is or can be disease producing termed? | show 🗑
|
||||
| show | Epidemic
🗑
|
||||
| show | Systemic
🗑
|
||||
| show | Absorb more primary radiation & Absorb more scattered radiation
🗑
|
||||
| When a slow screen film system is used with a fast screen film automatic exposure control system, the resulting image are what....Too light, Too dark, Have improved detail, Have poor detail? | show 🗑
|
||||
| How can the size of a particular structure or image can be calculated? | show 🗑
|
||||
| Exposed silver halide crystals are changed to black metallic silver by which.....Preservative, Reducers, Activators, Hardener? | show 🗑
|
||||
| show | IVP, BE, UGI
🗑
|
||||
| show | The female pelvic outlet is wider & The pubic angle is 90 degrees or less in the male.
🗑
|
||||
| The brightness level of the fluoroscopic image can vary with changes in which.....milliamperage, kilovoltage, patient thickness? | show 🗑
|
||||
| With a given exposure, as intensifying screen speed increases, how is radiographic density affected? | show 🗑
|
||||
| Which of the following can impact the visibility of the anode heel effect......SID, IR size, Screen speed? | show 🗑
|
||||
| Causes of grid cutoff, when using focused reciprocating grids, include which of the following.......Inadequate SID, X-ray tube off-center with the long axis of the lead strips, Angling the beam in the direction of the lead strips? | show 🗑
|
||||
| Most laser film must be handled how.......Under a Wratten 6B safelight, Under a GBX safelight, In total darkness, With high temperature processors. | show 🗑
|
||||
| Shape distortion is influenced by the relationship between which.......X-ray tube and the part to be imaged, Part to be imaged and the image recorder, Image recorder and the x-ray tube? | show 🗑
|
||||
| show | Its compact size & Durability
🗑
|
||||
| show | All of them. Recorded detail is improved using a small focal-spot size, largest practical SID, shortest possible OID, and slowest practical screen/film combination and avoiding motion of the part being imaged.
🗑
|
||||
| show | Sensitometer
🗑
|
||||
| High-kilovoltage exposure factors are usually required for radiographic examinations using which.......water-soluble iodinated media, a negative contrast agent, barium sulfate? | show 🗑
|
||||
| The functions of the automatic processor's recirculation system include which......Keeping the solution in contact with the film emulsion, Maintaining uniform temperatures, Mixing and agitating solutions, Add quantities of solution as required? | show 🗑
|
||||
| Which of the following is (are) associated with subject contrast.......Patient thickness, Tissue density, Kilovoltage? | show 🗑
|
||||
| When is the latent (invisible) image produced? | show 🗑
|
||||
| show | The manifest image is formed in the developer solution.
🗑
|
||||
| show | An increase in kV will increase the scatter production & the exposure rate will increase. Radiographic contrast will decrease with increase kV. Since kV increases scatter & as there's increased scatter, increased fog which decreases radiographic contrast.
🗑
|
||||
| Which of the following must the x-ray tube in CT be capable of.......High speed rotation, Short pulsed exposures, Withstanding millions of heat units? | show 🗑
|
||||
| Resolution in CR increases during which of the following........As laser beam size decreases, As monitor matrix size decreases, As PSP crystal size decreases? | show 🗑
|
||||
| Is digital resolution directly, or indirectly related to the matrix size? Why? | show 🗑
|
||||
| When screen speed increases, does radiographic detail increase, or decrease? What about when screen speed decreases? | show 🗑
|
||||
| show | Generally as the intensification factor increases, radiographic density increases?
🗑
|
||||
| show | All of them
🗑
|
||||
| How does screen speed affect radiographic density? | show 🗑
|
||||
| show | Use of high kV can even out the high contrast.
🗑
|
||||
| show | Absorption of useful radiation by a grid is grid cutoff.
🗑
|
||||
| Film exhibiting excessive density emerges from the automatic processor. What might this be attributable to....Developer temp too high, Chemical fog, Under-replenishment? | show 🗑
|
||||
| What is likely to result in using single emulsion film film in an IR that has 2 intensifying screens? Why is this? | show 🗑
|
||||
| show | A shorter scale of contrast.
🗑
|
||||
| Which of the following factors impact recorded detail......Focal spot size, subject motion, SOD? | show 🗑
|
||||
| Which of the following can impact the visibility of the anode heel effect......SID, IR size, Screen speed? | show 🗑
|
||||
| At which portion of the x-ray beam is the effective focal spot the largest? Why is this? | show 🗑
|
||||
| Where is the microswitch for controlling the amount of replenishment used in an automatic processor located? | show 🗑
|
||||
| show | To prevent scattered radiation fog.
🗑
|
||||
| All of the following have an effect on radiographic contrast except.....Photon energy, Grid ratio, OID, Focal spot size? | show 🗑
|
||||
| show | The higher the kV, the longer the scale of radiographic contrast resulting in lower contrast.
🗑
|
||||
| show | A sensitometer gives a pre-determined exposure. The densities on the film are read using a densitometer.
🗑
|
||||
| show | Low kV factors are indicated for water soluble iodinated contrast media & negative contrast.
🗑
|
||||
| show | All of them
🗑
|
||||
| A decrease in kV will result in which of the following.....Decrease in optical density, decrease in contrast, decrease in recorded detail, decrease in image resolution? | show 🗑
|
||||
| How does a decrease in kVp affect the scale of contrast? Does this result in higher, or lower contrast? | show 🗑
|
||||
| The effect described as differential absorption is which of the following....Responsible for radiographic contrast, Result of attenuating characteristics of tissue, Minimized by high kVp? | show 🗑
|
||||
| Which of the following is associated with subject contrast......Patient thickness, Tissue density, kVp? | show 🗑
|
||||
| Film base is currently made of which of the following materials....Cellulose Nitrate, Cellulose Acetate, Polyester, Glass? | show 🗑
|
||||
| show | Orthochromatic film is sensitive to all colors but red. Blue sensitive film is sensitive to blue, violet & UV light. Green sensitive film is sensitive to blue, violet, UV & green.
🗑
|
||||
| show | All of them
🗑
|
||||
| show | After exposure
🗑
|
||||
| Which of the following has the greatest effect on radiographic density......Aluminum filtration, kV, SID, Scattered radiation? | show 🗑
|
||||
| show | Phosphorescence
🗑
|
||||
| show | No. Yes, as FOV increases, pixel size increases.
🗑
|
||||
| show | The reducers. the exposed silver halide crystals are reduced to black metallic silver.
🗑
|
||||
| Geometric unsharpness (Magnification) is directly influenced by which....OID, SOD, SID? | show 🗑
|
||||
| Which of the following may be used to reduce the effect of scattered radiation on a finished radiograph......Grids, Collimators, Compression bands? | show 🗑
|
||||
| How does screen speed relate to radiographic contrast? | show 🗑
|
||||
| show | Developer temp too high & chemical fog.
🗑
|
||||
| Which of the following is most likely to occur from using a 14x17 field size @ 30" SID....Production of Quantum Mottle, Density variation @ opposite ends of IR, Production of scatter radiation fog, Excessively short scale contrast? Why is this? | show 🗑
|
||||
| Which portion of the straight line portion would most likely represent a density of 1.0.......Toe, Shoulder, Dmax, Straight Line portion? Where is this portion located between? What is the correct value range for exposure? | show 🗑
|
||||
| show | 1.0
🗑
|
||||
| show | The crossover rollers
🗑
|
||||
| show | Contrast would be increased based on the 6" air gap. An air gap will function by not allowing some of the scatter radiation to reach the IR which will increase contrast.
🗑
|
||||
| show | Noise & speed will increase with increases intensifying screen speed. With the increase speed, less dose technique is required which will decrease patient dose, but with the increased speed noise in the form of quantum mottle increases.
🗑
|
||||
| According to the line focus principle, a small anode angle will do which of the following.......Improve recorded detail, Improve heat capacity, Lessen Heel effect? | show 🗑
|
||||
| show | Add quantities of solution as required
🗑
|
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:
jamestkelley
Popular Radiology sets