Digital Imaging & PACS Chapter
5 & 6 with 100% correct
answers 2025 already graded
A+(verified & updated)
Which of the following flat-panel detector technologies was
developed by NASA?
A. CCD
B. Field-effect transistor
C. CMOS
D. Thin-field transistor - answer C. CMOS
When specialized pixels in a complementary metal oxide silicon
system are struck with x-ray photons:
A. the x-ray photons are converted into light.
B. light photons are stored in capacitors.
C. light photons are converted into electrical charges.
D. all answers are correct - answer D. all answers are correct
Which of the following statements is true?
A. Quantum efficiency and detective quantum efficiency are the
same.
B. Quantum efficiency will affect detective quantum efficiency.
C. Quantum efficiency has no effect on detective quantum efficiency.
D. Quantum efficiency is the absolute efficiency of the amount of
light collected. - answer B. Quantum efficiency will affect detective
quantum efficiency.
, The indirect conversion detector system that requires optical
coupling and image size reduction is known as a:
A. CCD.
B. field-effect transistor.
C. CMOS.
D. thin-field transistor. - answer A. CCD.
Which of the following can be done to decrease the chance of
having image lag occur in the next image?
A. Decrease the amount of time between exposures.
B. Increase the amount of time between exposures.
C. Leave collimation open.
D. Acquire the image requiring the highest technical factors first. -
answer B. Increase the amount of time between exposures.
Detector performance is measured with all of the following except:
A. spatial resolution.
B. observation of flow contrast objects in a phantom.
C. DQE.
D. contrast. - answer D. contrast.
Some advantages to CCDs include:
A. less expensive to manufacture.
B. module design makes repairs and upgrades easy.
C. demagnification capabilities.
D. a and c only. - answer D. a and c only.
Manufacturers make efforts to maintain a standard of less than
________ defective
5 & 6 with 100% correct
answers 2025 already graded
A+(verified & updated)
Which of the following flat-panel detector technologies was
developed by NASA?
A. CCD
B. Field-effect transistor
C. CMOS
D. Thin-field transistor - answer C. CMOS
When specialized pixels in a complementary metal oxide silicon
system are struck with x-ray photons:
A. the x-ray photons are converted into light.
B. light photons are stored in capacitors.
C. light photons are converted into electrical charges.
D. all answers are correct - answer D. all answers are correct
Which of the following statements is true?
A. Quantum efficiency and detective quantum efficiency are the
same.
B. Quantum efficiency will affect detective quantum efficiency.
C. Quantum efficiency has no effect on detective quantum efficiency.
D. Quantum efficiency is the absolute efficiency of the amount of
light collected. - answer B. Quantum efficiency will affect detective
quantum efficiency.
, The indirect conversion detector system that requires optical
coupling and image size reduction is known as a:
A. CCD.
B. field-effect transistor.
C. CMOS.
D. thin-field transistor. - answer A. CCD.
Which of the following can be done to decrease the chance of
having image lag occur in the next image?
A. Decrease the amount of time between exposures.
B. Increase the amount of time between exposures.
C. Leave collimation open.
D. Acquire the image requiring the highest technical factors first. -
answer B. Increase the amount of time between exposures.
Detector performance is measured with all of the following except:
A. spatial resolution.
B. observation of flow contrast objects in a phantom.
C. DQE.
D. contrast. - answer D. contrast.
Some advantages to CCDs include:
A. less expensive to manufacture.
B. module design makes repairs and upgrades easy.
C. demagnification capabilities.
D. a and c only. - answer D. a and c only.
Manufacturers make efforts to maintain a standard of less than
________ defective
