Chapter 8 Quiz Flashcards
Which term describes the useful area of a digital image receptor?
a.) FOV
b.) VOI
c.) ROI
d.) VOF
a.) FOV
_____________ imaging uses barium fluorobromide or cesium bromide for photon absorption.
a.) direct DR
b.) indirect DR
c.) CR
c.) CR
_______________ compression is recoverable and does not compromise image quality.
a.) lossless
b.) lossy
a.) lossless
WHich of the following are components of a CR system? (choose all that apply)
a.) workstation
b.) reader
c.) dry laser printer
d.) image receptor
a.) workstation
b.) reader
d.) image receptor
Digital fluoro equipment should be tested every __________
a.) week
b.) year
c.) 6 months
d.) month
c.) 6 months
A SMPTE pattern is best used to evaluate:
1.) dry laser printers
2.) electronic display devices
3.) image intensifiers
4.) DICOM systems
a.) 2 only
b.) 1 and 2
c.) 1, 2, 4
d.) 3 only
b.) 1 and 2
A ___________ uses a computer chip instead of a photoconductor target.
a.) plumbicon
b.) orthicon
c.) vidocon
d.) CCD
d.) CCD
Error correction tests should be performed by the:
a.) service engineer
b.) QC technologist
c.) physicist
d.) technologist
a.) service engineer
What are the disadvantages of DR? (choose all that apply)
a.) backscatter
b.) dropped pixels
c.) electronic noise
d.) lower SNR
a.) backscatter
b.) dropped pixels
c.) electronic noise
WHen is a coupling element needed in DR?
a.) when using a direct capture IR
b.) when using a indirect capture IR
c.) when used with an amorphous silicon photodetector
d.) when used with an amotphous selenium photoconductor
b.) when using an indirect capture IR
A DEL is also known as a :
a.) CCD
b.) AMA
c.) TFT
d.) pixel
d.) pixel
Which of the following describes a health record that covers the full range of a patients health history?
a.) RIS
b.) EHR
c.) EMR
d.) HIS
b.) EHR
The ability to resolve relatively large objects with similar density is called:
a.) high contrast resolution
b.) low contrast resolution
c.) flux gain
d.) magnification
b.) low contrast resolution
The ability to resolve relatively large objects with similar density is called:
a.) high contrast resolution
b.) low contrast resolution
c.) flux gain
d.) Minification
b.) low contrast resolution
Which fluoroscopy mode results in higher patient dose because it films in multiple frames per second?
a.) continuous
b.) pulsed interlaced
c.) slow scan
d.) pulsed progressive
a.) continuous
WHat is the primary factor that influences contrast in a digital image?
a.) kvp
b.) mas
c.) rescaling
d.) look up table (LUT)
d.) Look up table (LUT)
WHen exposing the second image in a series of xrays any residual TFT charge could result in :
a.) histogram error
b.) fading
c.) erasure
d.) ghosting
d.) ghosting
Amorphous silicon and cesium iodide is used in:
a.) CR imaging
b.) direct DR Imaging
c.) indirect DR Imaging
c.) Indirect DR Imaging
The most common types of electronic display devices used today are:
1.) CRT
2.) HD
3.) LCD
4.) Plasma
a.) 1 only
b.) 1, 3, 4
c.) 3 and 4
d.) 2, 3, 4
b.) 1, 3, 4
A semiannual or annual QC test would be:
1.) generator testing
2.) film processor maintenance if hard copies are printed
3.) clean CRT screen monitors
4.) evaluate exposure indicator accuracy
a.) 1 and 4
b.) 2, 3 and 4
c.) 1 only
d.) 2 and 3
a.) 1 and 4
Which of the following is NOT true of lossy compression
a.) compromises image quality
b.) cannot be reversed
c.) data is recoverable
d.) data can be compressed to 5 to 50 times
c.) data is recoverable
