Digital Radiography 50 MCQs For Govt Exam Practice : SSC, UPSC, AIIMS
A) Lower radiation exposure
B) Faster image acquisition
C) Higher resolution images
D) Greater patient comfort
Answer: B) Faster image acquisition
2. Which technology is commonly used to convert X-rays into digital signals in digital radiography?
A) Photographic film
B) Computed radiography (CR)
C) Magnetic resonance imaging (MRI)
D) Ultrasound technology
Answer: B) Computed radiography (CR)
3. What is the purpose of a PACS (Picture Archiving and Communication System) in digital radiography?
A) To control radiation dosage
B) To store, retrieve, and distribute digital images
C) To capture X-rays
D) To analyze radiographic images
Answer: B) To store, retrieve, and distribute digital images
4. Which of the following is a benefit of using digital radiography in a healthcare setting?
A) Reduced cost
B) Limited storage capacity
C) Lower image quality
D) Enhanced image manipulation and processing capabilities
Answer: D) Enhanced image manipulation and processing capabilities
5. How does digital radiography contribute to environmental sustainability compared to film-based radiography?
A) Requires more energy
B) Generates chemical waste
C) Reduces chemical use and waste
D) Emits harmful radiation
Answer: C) Reduces chemical use and waste
6. Which of the following is a characteristic of indirect digital radiography technology?
A) Uses a storage phosphor plate
B) Employs a direct detector
C) Utilizes selenium as a detector material
D) Requires film processing
Answer: A) Uses a storage phosphor plate
7. What is the purpose of an ADC (Analog-to-Digital Converter) in digital radiography?
A) To convert digital signals to analog signals
B) To enhance image contrast
C) To convert X-rays into visible light
D) To convert analog signals to digital signals
Answer: D) To convert analog signals to digital signals
8. Which term describes the ability of a digital imaging system to distinguish between small objects in an image?
A) Dynamic range
B) Pixel pitch
C) Modulation transfer function (MTF)
D) Spatial resolution
Answer: D) Spatial resolution
9. What role does the TFT (Thin Film Transistor) play in digital radiography?
A) Converts X-rays into electrical signals
B) Captures the X-ray image
C) Stores the digital image
D) Controls the flow of electrical signals from the detector to the computer
Answer: D) Controls the flow of electrical signals from the detector to the computer
10. Which factor contributes to the immediate availability of images in digital radiography?
A) Slower image processing
B) Image storage limitations
C) Film development time
D) Real-time image display
Answer: D) Real-time image display
11. Which type of digital radiography technology does not require cassettes?
A) Direct radiography (DR)
B) Computed radiography (CR)
C) Indirect radiography
D) Film-based radiography
Answer: A) Direct radiography (DR)
12. What is the advantage of a higher bit depth in digital radiography?
A) Decreased image quality
B) Reduced radiation exposure
C) Increased contrast resolution
D) Slower image processing
Answer: C) Increased contrast resolution
13. In digital radiography, what does the term "dose creep" refer to?
A) Gradual increase in radiation dose to patients
B) Decrease in image quality over time
C) Improved dose control mechanisms
D) Faster image acquisition
Answer: A) Gradual increase in radiation dose to patients
14. What factor primarily affects the signal-to-noise ratio (SNR) in digital radiography?
A) Patient positioning
B) X-ray tube voltage
C) Image resolution
D) Detector sensitivity
Answer: D) Detector sensitivity
15. Which digital radiography component stores electrical charge in proportion to the incident X-ray intensity?
A) Photostimulable phosphor
B) Photodiode
C) Photomultiplier tube
D) Capacitor
Answer: A) Photostimulable phosphor
16. How does digital radiography contribute to reducing retakes compared to film-based radiography?
A) By requiring more exposure adjustments
B) By providing instant image feedback
C) By using lower-quality detectors
D) By limiting imaging capabilities
Answer: B) By providing instant image feedback
17. Which term describes the ability of a detector to capture a wide range of X-ray exposure levels?
A) Dynamic range
B) Pixel size
C) Gray scale
D) Exposure latitude
Answer: A) Dynamic range
18. What is the purpose of image post-processing in digital radiography?
A) To reduce image resolution
B) To increase patient radiation exposure
C) To improve image quality and enhance diagnostic information
D) To decrease storage capacity requirements
Answer: C) To improve image quality and enhance diagnostic information
19. Which factor directly influences the pixel size in digital radiography?
A) Detector material
B) X-ray tube current
C) Exposure time
D) Field of view
Answer: A) Detector material
20. Which aspect of digital radiography technology allows for image manipulation without affecting the original data?
A) Image compression
B) Pixel size adjustment
C) Non-destructive editing
D) Dynamic range enhancement
Answer: C) Non-destructive editing
21. What is the advantage of using a scintillator in digital radiography detectors?
A) Converts X-rays into electrical signals
B) Enhances image contrast
C) Reduces image resolution
D) Increases patient radiation dose
Answer: A) Converts X-rays into electrical signals
22. How does the pixel pitch affect image quality in digital radiography?
A) Smaller pixel pitch results in higher spatial resolution
B) Larger pixel pitch increases contrast resolution
C) Pixel pitch has no impact on image quality
D) Pixel pitch determines image brightness
Answer: A) Smaller pixel pitch results in higher spatial resolution
23. Which factor does NOT contribute to the potential for image artifacts in digital radiography?
A) Detector malfunction
B) Patient movement during exposure
C) Increased exposure time
D) Software processing errors
Answer: C) Increased exposure time
24. What does the term "exposure indicator" refer to in digital radiography?
A) The amount of radiation emitted by the X-ray tube
B) An indicator of the patient's radiation dose
C) The brightness level of the displayed image
D) The efficiency of the detector in capturing X-rays
Answer: B) An indicator of the patient's radiation dose
25. In digital radiography, what is the purpose of a histogram analysis?
A) To determine the X-ray tube current
B) To adjust patient positioning
C) To evaluate exposure levels and image quality
D) To calibrate the detector sensitivity
Answer: C) To evaluate exposure levels and image quality
26. What advantage does a flat-panel detector offer in direct digital radiography (DR)?
A) Lower spatial resolution
B) Higher cost
C) Faster image acquisition
D) Limited dynamic range
Answer: C) Faster image acquisition
27. Which statement accurately describes the role of exposure latitude in digital radiography?
A) It refers to the range of exposures that produce diagnostic images of acceptable quality
B) It determines the field of view for digital images
C) It measures the sensitivity of the X-ray tube
D) It affects the pixel pitch in the digital detector
Answer: A) It refers to the range of exposures that produce diagnostic images of acceptable quality
28. What is the purpose of an antiscatter grid in digital radiography?
A) To reduce patient radiation dose
B) To increase scatter radiation
C) To improve contrast in the image
D) To enhance image resolution
Answer: A) To reduce patient radiation dose
29. Which factor does NOT affect the sensitivity of a digital radiography detector?
A) Thickness of the patient
B) X-ray beam energy
C) Detector material composition
D) Processing software used
Answer: A) Thickness of the patient
30. How does digital radiography improve workflow efficiency compared to film-based radiography?
A) By requiring longer exposure times
B) By limiting image storage options
C) By enabling simultaneous image viewing at multiple locations
D) By decreasing image quality
Answer: C) By enabling simultaneous image viewing at multiple locations
31. What is the purpose of the Nyquist theorem in digital radiography?
A) To determine pixel size
B) To evaluate spatial resolution
C) To calculate exposure time
D) To analyze patient positioning
Answer: B) To evaluate spatial resolution
32. Which aspect of digital radiography allows for easy transmission of images for remote consultations?
A) Reduced image quality
B) Limited image storage capacity
C) Compatibility with electronic devices
D) Incompatibility with network systems
Answer: C) Compatibility with electronic devices
33. What is the primary advantage of using a CCD (Charge-Coupled Device) detector in digital radiography?
A) Higher radiation exposure
B) Lower spatial resolution
C) Increased image noise
D) Fast readout speed
Answer: D) Fast readout speed
34. What does the term "dose creep" refer to in digital radiography?
A) Gradual decrease in radiation dose to patients
B) Improved image quality over time
C) Gradual increase in radiation dose to patients
D) Reduced exposure latitude
Answer: C) Gradual increase in radiation dose to patients
35. Which component of a digital radiography system is responsible for converting light into electrical signals?
A) Photostimulable phosphor
B) Photodiode
C) Thin Film Transistor (TFT)
D) Antiscatter grid
Answer: B) Photodiode
36. What effect does an increased bit depth have on digital radiography images?
A) Decreases image contrast
B) Reduces image noise
C) Enhances grayscale resolution
D) Decreases spatial resolution
Answer: C) Enhances grayscale resolution
37. How does digital radiography impact the storage and retrieval of patient records in a healthcare facility?
A) Increases physical storage space requirements
B) Reduces accessibility to patient records
C) Enables electronic storage and quick retrieval of images
D) Requires manual film processing for storage
Answer: C) Enables electronic storage and quick retrieval of images
38. What is the primary advantage of utilizing a direct capture detector in digital radiography?
A) Limited dynamic range
B) High image distortion
C) Improved image quality
D) Slower image acquisition
Answer: C) Improved image quality
39. Which digital radiography component allows for the manipulation of image brightness and contrast?
A) Antiscatter grid
B) Exposure indicator
C) Processing software
D) PACS system
Answer: C) Processing software
40. How does digital radiography contribute to reducing environmental impact compared to film-based radiography?
A) Increases chemical waste production
B) Requires higher energy consumption
C) Reduces the need for chemical processing
D) Generates more radiation
Answer: C) Reduces the need for chemical processing
41. Which of the following is an advantage of using direct digital radiography (DR) over computed radiography (CR)?
A) Lower initial equipment cost
B) Slower image acquisition
C) Higher potential for image artifacts
D) No need for cassette handling and processing
Answer: D) No need for cassette handling and processing
42. How does digital radiography impact the process of image archiving compared to traditional film-based radiography?
A) Increases physical storage space requirements
B) Reduces accessibility to archived images
C) Facilitates long-term electronic storage and retrieval of images
D) Requires manual cataloging for archiving
Answer: C) Facilitates long-term electronic storage and retrieval of images
43. What does the term "stitching" refer to in digital radiography?
A) The process of joining multiple images to create a single large image
B) A type of image compression technique
C) An artifact caused by detector malfunction
D) Enhancing image contrast using post-processing software
Answer: A) The process of joining multiple images to create a single large image
44. How does digital radiography influence the ability to share patient images across healthcare facilities?
A) Restricts image sharing due to format limitations
B) Allows seamless sharing through compatibility with DICOM standards
C) Reduces image quality during transmission
D) Requires physical transport of digital storage devices
Answer: B) Allows seamless sharing through compatibility with DICOM standards
45. What is the primary function of a grid in digital radiography systems?
A) Enhancing scatter radiation
B) Reducing contrast in the image
C) Removing artifacts from images
D) Minimizing the effect of scattered X-rays
Answer: D) Minimizing the effect of scattered X-rays
46. In digital radiography, what does "downtime" refer to concerning equipment?
A) The period when the X-ray machine is in use
B) Equipment malfunction leading to the inability to perform imaging
C) The time required to process images
D) Scheduled maintenance time for the X-ray machine
Answer: B) Equipment malfunction leading to the inability to perform imaging
47. Which aspect of digital radiography systems influences the ability to visualize fine details in an image?
A) Detector sensitivity
B) X-ray tube current
C) Image resolution
D) Patient positioning
Answer: C) Image resolution
48. What is the primary advantage of using a direct digital detector in radiography over indirect systems?
A) Higher spatial resolution
B) Lower image contrast
C) Greater susceptibility to artifacts
D) Longer image acquisition time
Answer: A) Higher spatial resolution
49. How does digital radiography technology contribute to dose optimization for patients?
A) By increasing radiation exposure during imaging
B) By providing immediate feedback on patient positioning
C) By limiting the dynamic range of the detector
D) By offering exposure control tools and dose monitoring
Answer: D) By offering exposure control tools and dose monitoring
50. Which factor is critical for ensuring proper image quality in digital radiography?
A) Higher patient movement during exposure
B) Lower exposure time
C) Adequate collimation of the X-ray beam
D) Reduced image processing time
Answer: C) Adequate collimation of the X-ray beam
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