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Computed Radiography Digital Radiography. LeeAnn Pack DVM Diplomate ACVR. Computed Radiography (CR). Been around since 1980-81 Uses same radiographic equipment No change in X-ray machine Uses an imaging plate Contains a photostimulator phosphor Need a cassette reader

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computed radiography digital radiography

Computed RadiographyDigital Radiography

LeeAnn Pack DVM

Diplomate ACVR

computed radiography cr
Computed Radiography (CR)
  • Been around since 1980-81
  • Uses same radiographic equipment
    • No change in X-ray machine
  • Uses an imaging plate
    • Contains a photostimulator phosphor
  • Need a cassette reader
  • Images can be sent to a PACS
cr cons
CR cons
  • Still need imaging plates
  • Cost of plates is expensive
  • Same amount of time to produce the image as with film
  • Processing time
  • Increased exposure when compared to film and DR
  • Works like a digital camera
    • Images are seen immediately
  • Two options
    • CCD
    • Digital flat plate detector
  • Can be sent to PACS
  • Small decrease in tech time/time to development when compared to CR
  • No film costs
  • No darkroom space
  • No processor to maintain
  • No films to search for or file
  • No expense for film jackets
  • Increased productivity
  • Decreased retakes
  • Decreased exposure (Eklin)
digital flat plate detectors
Digital Flat Plate Detectors
  • Expensive ($80,000-120,000)
  • Can retrofit into existing X-ray machines
  • Eklin
    • Exposure is decreased thus improving radiation safety
      • Do not use grid but use image software
  • Sound Technologies
  • Is sold with an X-ray machine
  • Camera is placed in machine before install – fits underneath the table
  • Less expensive than the Flat Plate Detector
  • Cause increase in exposure by 2 times
    • Double the mAs
potential cost savings
Potential Cost Savings
  • Film
  • Space
    • Wont need the darkroom space
  • Processor
    • Maintenance
  • Less technician time
    • Decreased repeats and no developing
  • Time lost looking for films
  • Ability to window exposures
    • Works like CT
    • Wider latitude for exposures
      • Less retakes
    • Better soft tissue
    • Image consistency
  • Picture – viewing at workstations
  • Archiving – images short/long term
  • Communication –local or wide area networks
  • System – use with HIS, other equip. ect.
  • Method that allows storing, retrieving, distributing throughout your hospital or the internet
  • Once an image is made – it is sent to the local PACS – a copy is also sent somewhere else (in house server, off site server)
  • Then the image can be pulled up and viewed
    • Multiple sites throughout the hospital
  • Digital Imaging and Communications in Medicine
  • Imaging standard that allows multiple pieces of medical equipment to communicate
  • Essentially all PACS and almost all equipment speak DICOM now
  • DICOM does not effect image quality
computer monitors
Computer Monitors
  • Bigger really is better
    • Small monitor can not see entire image
  • Some choose grey scale monitors
    • More expensive (3MP)
  • Some choose the Dell monitor
    • Less costly (2MP)
image back up
Image Back Up
  • Must have a way to back up copies of images in case your computer crashes
  • Time to “keep” images varies by province/state
  • 3 options
    • On site server
    • Off site server
    • Fingers crossed storage
  • Can send your images to a radiologist for interpretation
    • Should be of diagnostic quality
  • Buy machine they add in contract with radiologists
    • Be careful
hospital integration
Hospital Integration
  • Can integrate the images you take into the patients hospital record
    • If hospital is automated
  • Referral veterinarians can view images you have made and also receive reports
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