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[[File:Glossary Icon-2.png|100px|frameless|right|link=ICRP Glossary]]
MDCT systems are CT scanners with a detector array consisting of more than a single row of detectors. The ‘multi-detector-row’ conﬁguration of MDCT scanners refers to the use of multiple detector arrays (rows) in the longitudinal direction (i.e. along the length of the patient). MDCT scanners use a slip-ring gantry allowing helical acquisition while moving the patient. MDCT should be distinguished from digital ﬂat-panel detectors typically employed by CBCT scanners as these two diﬀerent detector technologies have a very distinct acquisition time latency dynamic range and spatial resolution.
(adapted from [[ICRP Publication 129]], 2015)
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