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Questions and Answers
What is a major drawback of CR systems?
What is a disadvantage of using single-plate readers in CR systems?
What is a source of noise in CR systems?
Why do PSP detectors in CR systems pick up background radiation and other scattered radiation?
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What is a consequence of not erasing signals from stored plates after a day or so in CR systems?
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What is a challenge of taking care of multiple PSPs in CR systems?
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What is the approximate delay for scanning CR plates?
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What is a disadvantage of using CR systems in facilities with a high patient workload?
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How do modern CR systems address the issue of cassette transfer and plate scanning?
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What is a consequence of PSP detectors being in detection position all the time in CR systems?
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Study Notes
Digital Radiography (DR) vs. Computed Radiography (CR)
Advantages of DR over CR
- Portability: DR systems allow for portability, whereas CR systems are bulky and fixed
- Image Quality: DR offers better image quality with higher DQE (65%) and lesser artifacts
- Speed: DR provides rapid image viewing within seconds, whereas CR takes around 6-8 minutes
- Patient Throughput: DR enables higher patient throughput due to faster image acquisition and display
- Flexibility: DR detectors can be retrofitted to existing technology, making it more flexible
- Cost: DR is more efficient, with lower costs for replacement parts and maintenance
- Portability and Convenience: DR allows for portable imaging with a single detector and mobile kit, eliminating the need for multiple cassettes
Disadvantages of CR
- Labor-Intensive: CR requires technicians to leave the patient and workstation to remove and insert cassettes into the reader
- Time-Consuming: CR processing time is longer due to the need to readout and process plates
- Noise and Interference: CR detectors are prone to picking up background radiation, scattered radiation, and residual signals
- Labor and Cost: CR requires significant labor and cost for inventory, cleaning, and quality assurance of multiple PSPs
- Delay: CR has a short delay of approximately 1 minute for scanning plates
Key Differences between CR and DR
- Initial Investment: DR has higher initial investment costs than CR
- Image Display: DR provides rapid image viewing, whereas CR takes around 6-8 minutes
- Labor Requirements: DR is completely digitized, while CR requires labor-intensive cassette transfer and processing
- Portability: DR is more portable, whereas CR is bulkier and less portable unless newer wireless systems are used
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Description
Comparing the advantages and disadvantages of Digital Radiography (DR) and Computed Radiography (CR) in medical imaging, including portability and flexibility.
