Computed Radiography Digital Radiography

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Computed Radiography Digital Radiography Powered By Docstoc
					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
• Images can be sent to a PACS
CT System
             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
• 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
DR Portable System - EKLIN
DR – Portable with Carrier
DR Portable System - IDEXX
• Is sold with an X-ray machine
• Camera is placed in machine before
  install – fits underneath the table
• Less expensive than the Flat Plate
• Cause increase in exposure by 2 times
  – Double the mAs
     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
• 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
  – Multiple sites throughout the hospital
• Digital Imaging and Communications in
• Imaging standard that allows multiple
  pieces of medical equipment to
• Essentially all PACS and almost all
  equipment speak DICOM now
• DICOM does not effect image quality
        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)
Dell 2407 HC
          Image Back Up
• Must have a way to back up copies of
  images in case your computer crashes
• Time to “keep” images varies by
• 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
  – Be careful
        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
• Images used in this presentation from