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Advantages/Disadvantages of CR

Advantages/Disadvantages of CR. Rad T 265. Advantages. Potential lower patient dose when utilized properly Higher DQE. Lower repeat rate Better contrast resolution No darkroom costs Edge enhancement Easy storage and retrieval. Disadvantages of CR. Initial costs Lower spatial resolution

cyrus-tyson
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Advantages/Disadvantages of CR

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  1. Advantages/Disadvantages of CR Rad T 265

  2. Advantages • Potential lower patient dose when utilized properly • Higher DQE

  3. Lower repeat rate • Better contrast resolution • No darkroom costs • Edge enhancement • Easy storage and retrieval

  4. Disadvantages of CR • Initial costs • Lower spatial resolution • Collimation and centering are critical • Potential for overexposure • Exposure creep

  5. Fuji ‘S’ Value • Inversely proportional of plate exposure • 1 mR at 80 kVp reads as an ‘S’ number of 200. • 0.1 mR equals ‘S’ # of 2000 • 10 mR = ‘S’ # of 20 • Ideal value is between 150 - 250

  6. Kodak exposure index • Directly proportional • 1 mR at 80 kVp = 2000 • 0.1 mR = 1000 • 10 mR = 3000 • Properly exposed • 1800 - 2200

  7. Underexposure with CR • Will produce quantum mottle • This is why overexposure is ‘better’ • Overexposure produces decreased contrast. • Think processor that is too hot.

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