Computed Radiography Practice MCQs:
Computed Radiography (CR) is a digital imaging technique used in radiology. It replaces traditional film-based methods by capturing X-ray images on a phosphor plate, which is then scanned to produce a digital image. This technology offers advantages like quicker image acquisition, lower radiation doses, and digital storage capabilities.
- A) Computed Resonance
- B) Computerized Radiology
- C) Contrast Resolution
- D) Conventional Radiography
Answer: B) Computerized Radiology
2. What is the primary advantage of Computed Radiography over traditional film-based methods?
- A) Higher radiation doses
- B) Slower image acquisition
- C) Digital storage capabilities
- D) Limited compatibility with X-rays
Answer: C) Digital storage capabilities
3. In Computed Radiography, what is used to capture X-ray images before conversion to digital form?
- A) Photographic film
- B) Fluoroscopy screen
- C) Phosphor plate
- D) Lead shielding
Answer: C) Phosphor plate
4. Compared to conventional radiography, what does Computed Radiography typically offer in terms of radiation exposure?
- A) Higher doses
- B) Lower doses
- C) Same doses
- D) Variable doses
Answer: B) Lower doses
5. What role does the scanning process play in Computed Radiography?
- A) Capturing X-rays
- B) Converting images to analog
- C) Transforming images to digital
- D) Enhancing contrast
Answer: C) Transforming images to digital
6. Which part of the Computed Radiography process involves using laser beams to stimulate the stored energy in the phosphor plate for image retrieval?
- A) Scanning
- B) Exposure
- C) Erasing
- D) Calibration
Answer: A) Scanning
7. What is the purpose of the photostimulable phosphor in Computed Radiography?
- A) To absorb X-rays
- B) To enhance contrast
- C) To store energy temporarily
- D) To convert X-rays to visible light
Answer: C) To store energy temporarily
8. In terms of workflow, how does Computed Radiography differ from traditional radiography?
- A) Slower processing time
- B) Immediate image availability
- C) Limited storage capacity
- D) Requires a darkroom for processing
Answer: B) Immediate image availability
9. What advantage does Computed Radiography offer in terms of image manipulation and enhancement?
- A) Limited manipulation options
- B) No post-processing capabilities
- C) Extensive post-processing capabilities
- D) Fixed image characteristics
Answer: C) Extensive post-processing capabilities
10. What type of radiographic examinations is Computed Radiography commonly used for?
- A) Dental imaging
- B) Mammography
- C) Bone studies
- D) All of the above
Answer: D) All of the above
11. What is the typical lifespan of a phosphor plate in Computed Radiography?
- A) One-time use
- B) Indefinite
- C) Several years
- D) Depends on the radiation dose
Answer: C) Several years
12. In Computed Radiography, what is the purpose of the erasing step during the imaging process?
- A) To remove artifacts
- B) To clear the phosphor plate for reuse
- C) To enhance image contrast
- D) To reduce radiation exposure
Answer: B) To clear the phosphor plate for reuse
13. How does Computed Radiography contribute to environmental sustainability compared to traditional radiography?
- A) Higher energy consumption
- B) Generates more waste
- C) Reduces chemical usage
- D) Increases radiation emissions
Answer: C) Reduces chemical usage
14. What is the primary limitation of Computed Radiography systems?
- A) Limited resolution
- B) High cost
- C) Limited availability
- D) Requires specialized training
Answer: A) Limited resolution
15. How does Computed Radiography improve patient care compared to conventional methods?
- A) Longer examination times
- B) Lower image quality
- C) Reduced radiation exposure
- D) Limited diagnostic information
Answer: C) Reduced radiation exposure
16. What role does the cassette play in Computed Radiography?
- A) Image processing
- B) Radiation absorption
- C) Image storage
- D) Laser scanning
Answer: B) Radiation absorption
17. What is the typical time delay between exposure and image retrieval in Computed Radiography?
- A) Instantaneous
- B) Several minutes
- C) Hours
- D) Days
Answer: B) Several minutes
18. What imaging modality often pairs with Computed Radiography for three-dimensional reconstructions?
- A) Magnetic Resonance Imaging (MRI)
- B) Computed Tomography (CT)
- C) Ultrasonography
- D) Positron Emission Tomography (PET)
Answer: B) Computed Tomography (CT)
19. How does Computed Radiography contribute to telemedicine and remote diagnostics?
- A) Limited connectivity
- B) Immediate image transmission
- C) Requires physical films
- D) No impact on telemedicine
Answer: B) Immediate image transmission
20. What quality control measures are essential for maintaining accuracy in Computed Radiography systems?
- A) Periodic recalibration
- B) Avoiding image processing
- C) Excessive radiation exposure
- D) Limited quality control needed
Answer: A) Periodic recalibration
21. How does Computed Radiography impact storage and retrieval of patient records compared to traditional film-based systems?
- A) Requires physical filing cabinets
- B) Enables electronic storage and retrieval
- C) Slows down record access
- D) Increases paperwork
Answer: B) Enables electronic storage and retrieval
22. What is the role of the analog-to-digital converter in the Computed Radiography process?
- A) Capturing X-rays
- B) Converting analog signals to digital
- C) Scanning the phosphor plate
- D) Producing visible light
Answer: B) Converting analog signals to digital
23. How does Computed Radiography contribute to dose optimization in pediatric imaging?
- A) Increases radiation exposure
- B) Limits image customization
- C) Allows for lower radiation doses
- D) Only applicable to adult imaging
Answer: C) Allows for lower radiation doses
24. What is the primary advantage of Computed Radiography in emergency situations?
- A) Longer processing times
- B) Requires a darkroom
- C) Immediate image availability
- D) Limited image portability
Answer: C) Immediate image availability
25. How does Computed Radiography impact the education and training of radiologic technologists?
- A) Simplifies training
- B) Requires less specialized knowledge
- C) Enhances hands-on experience
- D) No impact on education
Answer: C) Enhances hands-on experience
26. What safety considerations are associated with the handling of phosphor plates in Computed Radiography?
- A) None, as they are inert
- B) Avoiding direct exposure to light
- C) Immunity to physical damage
- D) No special precautions needed
Answer: B) Avoiding direct exposure to light
27. In Computed Radiography, what is the purpose of the image plate reader during the scanning process?
- A) Capturing X-rays
- B) Converting analog signals
- C) Erasing stored energy
- D) Reading and digitizing the stored image
Answer: D) Reading and digitizing the stored image
28. How does Computed Radiography contribute to the reduction of retake rates in imaging procedures?
- A) Increases retake rates
- B) Offers limited image adjustments
- C) Allows for post-processing corrections
- D) No impact on retake rates
Answer: C) Allows for post-processing corrections
29. What challenges might be associated with the transition from traditional radiography to Computed Radiography in a healthcare facility?
- A) Improved efficiency
- B) Resistance to change
- C) Lower initial costs
- D) No impact on workflow
Answer: B) Resistance to change
30. How does Computed Radiography handle the issue of overexposed or underexposed images?
- A) Automatically corrects exposure errors
- B) Amplifies overexposed images
- C) Requires retake for any exposure errors
- D) No adjustments possible
Answer: A) Automatically corrects exposure errors
31. What role does the Image Receptor (IR) play in Computed Radiography?
- A) Absorbing X-rays
- B) Converting X-rays to analog signals
- C) Storing the digital image
- D) Initiating the laser scanning process
Answer: C) Storing the digital image
32. How does Computed Radiography contribute to dose monitoring and management in radiology departments?
- A) Increases radiation doses
- B) Requires manual dose adjustments
- C) Provides dose tracking and analysis
- D) No impact on dose control
Answer: C) Provides dose tracking and analysis
33. What is the primary advantage of Computed Radiography in terms of image manipulation for educational purposes?
- A) Limited educational value
- B) Allows for real-time adjustments
- C) No impact on educational materials
- D) Inhibits interactive learning
Answer: B) Allows for real-time adjustments
34. In Computed Radiography, how does the digital format contribute to teleconsultations among healthcare professionals?
- A) Limits communication
- B) Enables remote collaborations
- C) Requires physical films
- D) Slows down consultations
Answer: B) Enables remote collaborations
35. What is the significance of the latent image in the context of Computed Radiography?
- A) Represents a visible image
- B) Temporary image stored in the phosphor plate
- C) Affects image contrast
- D) Irrelevant to the imaging process
Answer: B) Temporary image stored in the phosphor plate
36. How does Computed Radiography contribute to the reduction of patient wait times in radiology departments?
- A) Increases wait times
- B) Requires longer examination periods
- C) Speeds up image acquisition and processing
- D) No impact on patient wait times
Answer: C) Speeds up image acquisition and processing
37. What is the typical size of the pixel pitch in Computed Radiography systems?
- A) Large pitch for higher resolution
- B) Small pitch for higher resolution
- C) No correlation between pitch and resolution
- D) Pitch is not relevant to resolution
Answer: B) Small pitch for higher resolution
38. How does Computed Radiography enhance the archival and retrieval of historical patient images compared to traditional methods?
- A) No impact on archival processes
- B) Requires physical film archives
- C) Enables easy digital retrieval and comparison
- D) Slows down historical record access
Answer: C) Enables easy digital retrieval and comparison
39. What is the purpose of the grid in Computed Radiography when performing certain examinations?
- A) Absorbing X-rays
- B) Enhancing contrast
- C) Reducing scattered radiation
- D) Eliminating image artifacts
Answer: C) Reducing scattered radiation
40. How does Computed Radiography contribute to the standardization of image quality in radiology practice?
- A) Allows for variable image quality
- B) Standardizes image characteristics
- C) Inhibits quality control measures
- D) No impact on image consistency
Answer: B) Standardizes image characteristics
41. In Computed Radiography, what is the purpose of the analog signal generated during the scanning process?
- A) Directly creates visible light
- B) Represents the stored image
- C) Initiates laser scanning
- D) Converts directly to digital form
Answer: B) Represents the stored image
42. How does Computed Radiography contribute to dose reduction in pediatric patients compared to adults?
- A) Requires higher radiation doses
- B) Offers similar doses for all age groups
- C) Adjusts radiation doses based on patient size
- D) No impact on pediatric imaging
Answer: C) Adjusts radiation doses based on patient size
43. What role does the histogram play in Computed Radiography image processing?
- A) Capturing X-rays
- B) Measuring radiation exposure
- C) Enhancing image contrast
- D) Analyzing pixel values
Answer: D) Analyzing pixel values
44. How does Computed Radiography contribute to improved patient comfort during imaging procedures?
- A) Prolongs examination times
- B) Requires physical repositioning
- C) Shortens examination times
- D) No impact on patient comfort
Answer: C) Shortens examination times
45. What is the primary disadvantage of Computed Radiography compared to Direct Digital Radiography (DDR)?
- A) Slower image acquisition
- B) Higher cost
- C) Limited post-processing capabilities
- D) No significant differences
Answer: A) Slower image acquisition
46. How does Computed Radiography contribute to reducing the environmental impact of traditional radiographic film processing chemicals?
- A) Increases chemical usage
- B) Requires specialized disposal methods
- C) Eliminates the need for chemicals
- D) No impact on environmental concerns
Answer: C) Eliminates the need for chemicals
47. What is the primary challenge associated with the storage and management of large volumes of digital images in Computed Radiography?
- A) Limited storage capacity
- B) Difficulty in image retrieval
- C) Requires physical film storage
- D) Demands robust data management systems
Answer: D) Demands robust data management systems
48. How does Computed Radiography contribute to the customization of imaging protocols for different clinical scenarios?
- A) Limits protocol variations
- B) Allows for protocol adjustments
- C) Requires manual adjustments for each patient
- D) No impact on imaging protocols
Answer: B) Allows for protocol adjustments
49. What is the primary factor influencing the spatial resolution in Computed Radiography systems?
- A) Size of the phosphor plate
- B) Pixel pitch
- C) Laser intensity
- D) Scanning speed
Answer: B) Pixel pitch
50. How does Computed Radiography contribute to the integration of imaging data into electronic health records (EHR)?
- A) Requires manual data entry
- B) Inhibits data integration
- C) Facilitates seamless integration
- D) No correlation with EHR systems
Answer: C) Facilitates seamless integration
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