1.

Which of the following are correct regarding image acquisition in CT? a. Multi-slice scanners are more susceptible to ring artefacts b. The cone beam effect causes blurry boundaries between high-contrast details c. The distance between the X-ray source and the patient will affect spatial resolutiond. All the detectors in each row in CT are of the same size e. A 180° arc is used in cardiac CT for data collection

Answer»

a. False. In multi-slice scanners, a larger change in sensitivity of the detector is needed to cause ring artefacts, so it is less susceptible. 

b. True. Blurry boundaries between high-contrast details results from the cone beam effect. 

c. True. 

d. False. 

e. True. 



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