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Retrospective ECG-gated spiral scanning



  •  For "retrospectively ECG-gated spiral scanning" a continuous spiral scan is acquired with the ECG-signal recorded simultaneously. 
  •  The acquired scan data is selected for image reconstruction with respect to a pre-defined cardiac phase. 
  •  Similar to ECG-triggered sequential scanning a certain R-wave delay time defines the start point of data that is used for image reconstruction. 
  •  It has several advantages over ECG-triggered sequential scanning as the continuous acquisition allows for reconstruction of overlapping slices. But due to the retrospective analysis of the ECG, the technique is less sensitive to arrhythmia. 

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