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RADT 465 IA&E
ARRT registry review
| Question | Answer |
|---|---|
| What are two image quality factors? | visibility and geometric factors pg 298 |
| What are visibility factors? | density/brightness and contrast/grey scale pg 298 |
| What are the geometrics factors? | recorded detail/spatial resolution and distortion pg298 |
| What are the exposure/technical factors used to create an image? | mA, time, kV, and distance pg298 |
| What does SID and OID regulate? | magnification pg 299 |
| T or F recorded detail and magnification are inversely related. | True pg 299 |
| What are the two types of shape distortion? | foreshortened and elongation pg 303 |
| Focal spot size affects detail by influencing the degree of blur or unsharpness; so focal sport is _1__related to OID and ___2_related to SID | 1. directly 2. inversely pg308 |
| How do you minimized voluntary and involuntary motion on a radiograph? | voluntary through effective communication of breath holds and involuntary by select the shortest exposure time possible pg310 |
| Intensifying screens were used to ________. | increase speed, decrease patient dose, and to help increase x-ray tube life. |
| mAs is inversely related or directly proportional to image density? | Directly proportional pg317 |
| Increased kV produces more or less high-energy x-ray photons? | more pg 321 |
| When should a grid be used? | if the body part being image is greater then 10cm thick |
| What is the anode heel effect? | As x-ray photons are produced within the anode, a portion of the divergent beam is absorbed by the anode's heel. this represents a decrease in x-ray beam intensity at the anode end of the x-ray beam pg 337 |
| what is the outstanding quality of digital imaging? | exceptional contrast resolution pg 354 |
| What is pixel depth directly related to? | shades of grey called dynamic range pg 355 |
| What is a matrix? | is the number of pixels (picture element) in the XY direction |
| What does HIS stand for and what is it? | hospital information system is a computer system that serves to track patient information; admission and discharge dianositc and treatment etc.. pg366 |
| What does RIS stand for and what is it? | radiology information system that includes procedure ordering and scheduling patient database maintenance, reporting transcription and billing pg 366 |
| What is PACS? | An organization of computers networked together and capable of archiving and transmitting medical images. features include acquisition, interpretation, communication network. pg366 |
| List types of screen/film artifacts? | handing (static) , processing (chemical fog), exposure (clothing)pg 383 |
| What information is required on an x-ray image? | patients name/id number, side marker left or right, examination date, institutions name pg 385 |
| List the order of step to process film. | Develop, fixer, wash, dryer pg 387 |
| what does developer do? | developer reduces exposed silver bromide to black metallic silver pg 386 |
| what does fixer do? | fixer cleans the film of the unexposed silver bromide and rehardens the emulsion |
| what is the wash for? | wash removes processing chemicals and permits archival quality pg 386 |
| what is a histogram? | is a graphic representation defining all the grayscale values of a articular image pg 398 |
| What are the three stages of PSP? | x-ray exposure, scanning/reading, erasure |
| what is windowing? | is when a radiographer can alter the digital imaging at the monitor through post processing. windowing is beable to change the brightness level of an image pg 406 |
| List reason why a image may have graininess? | underexpose, incorrect processing algorithm, excess scattered radiation, grid misalignment cutoff pg 405 |
Created by:
kdfields
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