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RADT 465 Image Prod.
ARRT Registry Review Covering Image Production and Evaluation Content Area
| Question | Answer |
|---|---|
| Adding filtration will result in what effect on the x-ray beam? | A decrease in x-ray intensity & an increase in effective energy of the x-ray beam (Saia, p 195) |
| What is the relationship between SID and recorded detail? | Direct relationship ( Saia, p 196) |
| What component of a CR imaging plate actually records the radiographic image? | Photostimulable phosphor (Saia, p 197) |
| Foreshortening can be caused by improper what? | Alignment of the part and IR (placement of the part at an angle to the IR) (Saia, p 198) |
| Film fog can be attributable to what factors? | The age of the film, excessive exposure to safelight, & processor chemistry (Saia, p 199) |
| Name some characteristics of DR imaging. | Solid-state detector receptor plates, a direct-capture imaging system, & immediate image display (Saia, p 200) |
| What examples of pathological conditions would require an increase in exposure factors? | Atelectasis, Paget disease, & congestive heart failure (Saia, p 201) |
| A 5-in. object is imaged with a 44-in. SID and is 6-in. from the image receptor. What will be the image width? | 5.7 in. (Saia, p 203) |
| What circumstances allow for greater latitude for the radiographer? | Using high kV technical factors & using a low-ratio grid (Saia, p 204) |
| Spatial resolution can be increased using the same FOV and what? | A larger matrix (Saia, p 205) |
| In CR imaging, what is the component that changes the latent image present on the PSP to a computerized image? | ADC (Saia, p 206) |
| If the kV is lowered by 15% and the mAs is increased by 50%, what will the end result be? | Shorter scale of contrast (Saia, p 207) |
| What factors can affect the visibility of the anode heel effect? | SID & IR size (Saia, p 208) |
| List the correct order of radiographic film processing. | Developer, fixer, wash, dry (Saia, p 209) |
| Diagnostic x-rays are normally associated with ___ frequency and ___ wavelength. | High; short (Saia, p 210) |
| What factors are attributable to both the quantity and quality of the primary beam? | Half-value layer (HVL) and kilovoltage (kV) (Saia, p 211) |
| Underexposure of a radiographic image can be caused by what? | mA, exposure time, & kV (Saia, p 212) |
| Quantum mottle is associated with what type of combination of factors? | Decreased mAs, increased kV (Saia, p 213) |
| The anode heel effect can be applied to what types of imaging procedures? | Lateral thoracic spine & AP femur (Saia, p 214) |
| Define the reciprocity law. | A particular mAs value, regardless of the combination of mA and exposure time, will reproduce identical radiographic density (Saia, p 215) |
| How is magnification fluoroscopy accomplished? | Moving the image intensifier focal point further from the output phosphor & selecting a smaller portion of the input phosphor (Saia, p 216) |
| What factors contribute to histogram appearance? | Beam restriction, centering errors, & incorrect SID (Saia, p 217) |
| For what radiographic procedures is low kV required? | Water-soluble, iodinated media & negative contrast agents (Saia, p 218) |
| A decrease from 200 to 100 mA will also decrease what? | Exposure rate & beam intensity (Saia, p 219) |
| What factors can reduce the amount of scattered radiation reaching the IR? | An air gap & a stationary grid (Saia, p 220) |
| What is the purpose for the electroconductive layer of a PSP plate? | Facilitate transportation through the scanner/reader (Saia, p 221) |
| The exposure time can be decreased by 50% to reduce the chance of involuntary motion if the kV is what? | Increased by 15% (Saia, p 223) |
| What interaction produces the most x-ray photons at the x-ray tube target? | Bremsstrahlung (Brems) (Saia, p 224) |
| The relationship between the actual and the effective focal spot is described by the what? | The line-focus principle (Saia, p 225) |
| What factors contribute to distortion? | Tube angle, the position of the structure being imaged within the body, & the radiographic positioning of the part (Saia, p 229) |
Created by:
meschnell
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