FREE AND STUDY GAMES ABOUT TECHNIQUE AND

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FREE AND STUDY GAMES ABOUT TECHNIQUE AND

ERRORS EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

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-Guarantee passing score -37 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: What happens when the collimated X ray beam interact with a patient specific area shield?

Answer:

Response time increases in an effort to penetrate the lead shield.

Question 2: what is the image wisely initiative?

Answer:

a joint initiative of ACR, RSNA, ASRT and AAPM, provides information to the medical community to promote safety in medical imaging

Question 3: Histogram Analysis Error

Answer:

Image Processing and Display | Radiology Key If at least three edges are not identified, all data, including raw exposure or scatter outside the field, may be included in the histogram, resulting in a histogram analysis error

Question 4: how many distinct margins should appear on digital radiography?

Answer:

At least three collimated margins should be seen but four is better Question 5: What type of algorithm is used to correct for malfunctioning pixels?

Answer:

interpolation algorithm

Question 6: Deviation index

Answer:

measures the difference between how many photons should be reaching the image receptor in the relative image region for that particular study and the amount of x-ray photons that actually do reach the image receptor in the relative image region

Question 7: How should a digital exposure techniques system be established ?

Answer:

According to the ASRT White Paper on best practice in digital radiography, it is recommended "to use exposure technique charts that are continuously improved and applicable to a wide range of patient sizes" (2012).

Question 8: What is the image gently initiative?

Answer:

the goal of the Image Gently Alliance is to through advise, to improve safe and effective imaging care of children worldwide

Question 9: Exposure Field Recognition

Answer:

digital radiography process in which the computer distinguishes the raw data representative of info within the exposure field from that which comes from outside the exposure field so that proper automatic rescaling can occur

Question 10: Electronic Masking

Answer:

Cropping or shuttering. Used to remove undesirable information in an effort to improve image quality

Question 11: What causes photon starvation?

Answer:

Not enough exposure to the detector elements

Question 12: Detector Saturation

Answer:

Data drop that involves areas or regions of the detector

Question 13: Moiré Effect

Answer:

mechanical interference of light by superimposed networks of lines

Question 14: Exposure Latitude

Answer:

the extent to which a light-sensitive material can be overexposed or underexposed and still achieve an acceptable result Question 15: what are the three general classifications of digital image artifacts?

Answer:

image receptor artifacts, software artifacts, and object artifacts

Question 16: How is exposure field recognition utilized?

Answer:

used to recognize the clinically useful area on the imaging plate so it is the only data that will be manipulated, and it eliminates the signals from outside the collimated field.Question 17: what type of error can occur when an image is not properly aligned with the image receptor?

Answer:

technique error Question 18: what does a DI value of -2 indicate? What is recommended action for such a value?

Answer:

under exposure

Question 19: Diagnostic Acuity

Answer:

Image quality on a radiograph and fall within a acceptance exposure index range

Question 20: Interpolation

Answer:

a mathematical process used to smooth, enlarge or average images that are being displayed with more pixels than that for which they were originally reconstructed

Question 21: Exposure Index

Answer:

a measure of radiation in the relevant image region on the receptor

Question 22: What can cause electronic artifacts on DR images?

Answer:

Bucky Motor Interference, X ray to rotator initiation, AEC noise. Pg 324

Question 23: How are data drop and detector saturation related?

Answer:

data drop can lead to detector saturation Question 24: which technical factor controls the amount of scatter in digital imaging?

Answer:

mAs Question 25: how should a technology select kilovoltage to minimize patient radiation dose?

Answer:

increasing the kV reduces the exposure of the patient and especially to the skin exposed by the beam.

Question 26: Photon Starvation

Answer:

Inadequate exposure to the detector elements