Preview: MEDICAL IMAGING / RADIOGRAPHY

Justification in medical imaging requires that: Context: teaching hospital. [Medical Imaging/Radiography Degree Graduate Practice Set 3, Case 143]

A Dose be maximized B Imaging replace clinical assessment C Expected clinical benefit outweighs radiation risk for the examination D All repeat examinations be automatic E Every available test be performed

In CT, increasing pitch while other factors remain comparable can generally: Context: emergency setting. [Medical Imaging/Radiography Degree Graduate Practice Set 3, Case 144]

A Convert CT to MRI B Eliminate all radiation C Prevent reconstruction D Change scan speed and radiation dose characteristics E Remove the need for protocol optimization

A stochastic radiation effect is characterized by: Context: outpatient service. [Medical Imaging/Radiography Degree Graduate Practice Set 3, Case 148]

A Probability increasing with dose without a clear threshold B No relationship to radiation C Severity always increasing above a fixed threshold only D Immediate mechanical injury E Only equipment damage

In CT, increasing pitch while other factors remain comparable can generally: Context: emergency setting. [Medical Imaging/Radiography Degree Graduate Practice Set 3, Case 48]

A Eliminate all radiation B Change scan speed and radiation dose characteristics C Convert CT to MRI D Prevent reconstruction E Remove the need for protocol optimization

MRI signal fundamentally depends on properties of: Context: district hospital. [Medical Imaging/Radiography Degree Graduate Practice Set 3, Case 69]

A Nuclei such as hydrogen interacting with magnetic fields and radiofrequency pulses B Ionizing X-rays only C Visible photons D Ultrasound crystals only E Gamma cameras only

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MEDICAL IMAGING / RADIOGRAPHY – DEGREE QZ03

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