module 6

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Author:
johndc3476
ID:
183368
Filename:
module 6
Updated:
2012-11-13 03:18:53
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johndc3476
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  1. LCD monitors excel over cathode ray tube displays because they consume less energy and have better spatial resolution.
    TrueLower power consumption and increased spatial resolution are reasons why LCDs are rapidly replacing CRT display monitors. 
  2. Technologist workstation LCD monitors have luminance levels similar to analog viewboxes which makes ambient lighting conditions less of a concern
    • False:
    • Workstation LCD displays have much lower luminance than traditional viewbox illuminators used to view analog images. 
  3. The contrast capability of a monitor controls the ability of users to see lines and fine structures in a displayed image.
    • True:
    • When viewing images on displays with poor contrast capabilities, it's very difficult to see structural lines and fine image details as separate and distinct from background textures. 
  4. The modality work-list information provided by a modality workstation should at a minimum include the modality, examination requested and patient location.
    • True:
    • Although workstation displays may include many more items, the modality, exam requested and patient location are considered essential.
  5. Postage stamp images on workstation display monitors help technologists navigate through images of a given exam or series of exams.  
    • False:
    • These images are referred to as thumbnail images, not postage stamp images
  6. At times a technologist must modify the order that generates the work-list entry. The sender must notify the recipient of this change in the patient’s charted record and explain it, if possible.
    • True:
    • The electronic modifying data in a patient record requires the same documentation as traditional paper records. 
  7. Modality workstation software allows a black mask to be placed over bright areas of display images caused by beam collimation. This masking of bright areas is referred to as stitching.  
    • False:
    • Stitching combines two separate images into one image. Shuttering is the term used to describe adding black borders to an image display.
  8. "Edge Enhancement" describes the manipulation of pixel values in extracted image data to change the visual appearance of a structure.
    • True:
    • |Edge enhancement uses processing codes to sharpen the edges of bone and trabecular patterns.
  9. Image (B) exhibits a lower level of graininess than image (A). Noise suppression accounts for this difference in image appearance.
    TrueNoise suppression, or smoothing, is an image processing technique that reduces noise in an image.
  10. Electronic annotation, which places an anatomical side marker on an image at the technologist workstation, should not be a common practice even though it's possible.
    • True:
    • Electronic annotation occurs after the image is captured.
  11. When exporting an image to print, it's critical that the laser camera/printer recognize the image’s actual size format and scale.
    • True:
    • Laser cameras or printers can print to different sized films or a single sized film
  12. Of the two types of laser films used to print patient images, dry laser films require only heat for image transfer and are less likely to degrade than wet type laser film when subjected to temperature variations.
    • False:
    • Dry laser film is more likely to degrade in a storage environment where temperatures are controlled.

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