Shared Flashcard Set

Details

Final review
Exposure to Image - Series of Events
11
Health Care
Undergraduate 3
12/09/2014

Additional Health Care Flashcards

 


 

Cards

Term
1
Definition
patient receives exposure and exit radiation hits the IP
Term
2
Definition
radiation excites electrons in the photostimulable phospor plate (PSP)
Term
3
Definition
the conductive layer of the IP traps the electrons in "phosphor centers" in a pattern representing the anatomy and the intesity of the radiation striking the IP at each phosphor center or pixel
Term
the number of pixels determines
Definition
the resolution of the image (the higher the number, the better the detail or resolution of the image)
Term
4
Definition
this is the "latent image" and remains on the IP until it is read. this hsould be as soon as possible because this is a metastable state and will not last for a long period of time
Term
5
Definition
the IP is inserted in to the reader where a re laser scans it in a zig-zag "raster" pattern. The laser releases the trapped electrons. As they are released, the give off "blue light" in an inteity corresponding to the amount of radiation recieved
Term
6
Definition
the light intesity is detected by a photomultiplier tube which converts the light in to an electronic signal which is in analog form
Term
7
Definition
the analog signal is then converted to a digital signal by the analog-to-digital converter
Term
8
Definition
this digital information cannow be manipulated by the computer using correctly selected algorithms based on the part selected and using Look-up tables (LUT) to do histogram
Term
9
Definition
the image is now visible and can be further manipulated tochange brightness and contrast as needed
Term
10
Definition
finally the IP is erased using a bright white light so that any remaining trapped electrons will be released and the IP can be re-used
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