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Patient 4 (a) Synchronized 4D CT contrast showing peak HU of 138 in average intensity projection (AIP). (b) Diagnostic 3D CT contrast of same slide showing peak HU 0f 141. (c) Synchronized 4D CT delayed showing washout. (d) Diagnostic non contrast scan. (e) DRR showing Synchronized 4D CT scan length. L0, Ls, TSCANDELAY and corresponding aortic enhancement at 4D CT scan length and LOI.
