Chapter 7 & 8 Test Flashcards
The largest and most sensitive type of television camera that functions as both an image intensifier and tube is the:
a.) orthicon
b.) plumbicon
c.) CCD
d.) vidocon
a.) orthicon
The appearance of quantam mottle on a radiographic image is caused by:
a.) incorrect post processing
b.) excessive receptor exposure
c.) inadequate receptor exposure
d.) small matrix size
c.) inadequate receptor exposure
Amorphus silicon and cesium iodide is used in:
a.) indirect DR imaging
b.) direct DR imaging
c.) CR imaging
a.) indirect DR imaging
Who performs acceptance tests on digital equipment?
a.) medical physicist
b.) QC technologists
c.) system engineer
d.) radiologist
a.) medical physicist
Which of the following describes the range of exposure intensities an image receptor can respond to?
a.) dynamic range
b.) DICOM
c.) exposure latitude
d.) histogram analysis
a.) dynamic range
Which of the following is NOT true of lossy compression:
a.) data is recoverable
b.) data can be compressed to 5 to 50 times
c.) cannot be reversed
d.) compromises image quality
a.) data is recoverable
Which of the following is not a “tube” type of television camera?
a.) vidocon
b.) CCD
c.) orthicon
d.) plumbicon
b.) CCD
When exposing the second image in a series of x rays, any residual TFT charge could result in:
a.) fading
b.) erasure
c.) histogram error
d.) ghosting
d.) ghosting
Selections of a region of the digital image data set that is used for statistical analysis describes:
a.) values of interest (VOI)
b.) region of interest (ROI)
c.) region of value (ROV)
d.) histogram analysis
b.) region of interest (ROI)
Brightness gained by high voltage across the xray tube is defined as:
a.) minification gain
b.) brightness gain
c.) resolution gain
d.) flux gain
d.) flux gain
A ___________ uses a computer chip instead of a photoconductive target
a.) plumbicon
b.) CCD
c.) orthicon
d.) vidocon
b.) CCD
All of the following are components of a fluoro system except:
a.) xray tube
b.) image plate reader
c.) generator
d.) video monitoring system
e.) image intensifier
b.) image plate reader
Which of the following is NOT part of the image intensifier tube?
a.) anode
b.) filament
c.) photocathode
d.) output phosphor
b.) filament
What are the two ways that the output phosphor and the television camera can be linked?
1.) CCD
2.) orthicon
3.) lens coupling
4.) fiber optics
5.) closed circuit tv
a.) 3 and 4
b.) 1 and 2
c.) 2 and 5
d.) 1 and 5
a.) 3 and 4
A motion picture camera is called:
a.) DVR
b.) spot film camera
c.) cinefluorography
d.) spot film device
c.) cinefluorography
In digital fluoroscopy, which part of the flat panel detector absorbs xrays and emits light?
a.) none of these
b.) input phosphor
c.) output phosphor
d.) rotating anode
a.) none of these
In a dual focus multifield image intensifier, the most common FOV choices are:
a.) 5”
b.) 6”
c.) 7”
d.) 9”
e.) 10”
a.) a, b, d
b.) a, c, e
c.) a, c
d.) b and d
d.) b and d
Which of the following describes a health record that covers the full range of a patients health history?
a.) RIS
b.) HIS
c.) EHR
d.) EMR
c.) EHR
What determines the range of data in a histogram model that is to be displayed?
a.) histogram
b.) region of interest (ROI)
c.) value of interest (VOI)
d.) histogram analysis
c.) value of interest (VOI)
The maximum ESE for fluoro units equipped without ABS is:
a.) 10 R/min
b.) 100 R/min
c.) 50 R/min
d.) 5 R/min
d.) 5 R/min
Dropped pixels are caused by:
a.) nonfunctioning detector elements
b.) electronic interference
c.) double exposure
d.) histogram errors
a.) nonfunctioning detector elements
___________ compression is recoverable and does not compromise image quality.
a.) lossless
b.) lossy
a.) lossless
Which of the following is a network used for transmission and exchange of patient images, data, storage,, viewing and workstations?
a.) HIS
b.) DICOM
c.) PACS
d.) RIS
c.) PACS
Reproducibility for fluoro equipment should be within:
a.) 5%
b.) 10%
c.) 2%
d.) 3%
a.) 5%