1. Advantages/Disadvantages of CR
Rad T 265

2. Advantages Potential lower patient dose when utilized properly
Higher DQE
Exam
Decrease in dose
UGI 5%
Pelvis
12%
Chest
14-20%
IVP
50%

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

6. Kodak exposure index Directly proportional 1 mR at 80 kVp = 2000
Properly exposed

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