“…Given the speed of operation, CT scanning can be performed without anaesthesia, thus avoiding cumbersome logistics and anaesthetic recovery times [32,34,37,147]. Thus, CT appears to be higher-yielding and easier to perform than MRI for cross-sectional imaging in preschool patients with a new diagnosis of CF, especially when performed in uncooperative patients [32,[146][147][148]162 Follow-up CR versus CT Despite the absence of strong supporting evidence in the literature, CR remains the most frequently used imaging modality for lung disease monitoring in several specialist centres; this is due to its ready availability and low cost, and the decades-long use of this technique by CF clinicians during routine follow-up. However, the sensitivity of CR is poor, and inter-observer variability between radiologists is high, even when combined with adequate scoring systems [47,48,50].…”