Abstract #4455

Validation of 4D Flow Shunt Fractions (Qp/Qs) with 2D-PC in Patients with Partial Anomalous Pulmonary Venous Return

Mark L. Schiebler¹, Phillip Kilgas¹, Elizabeth Janus Nett², Oliver Wieben², Shardha Srinivasen³, Petros Anagnostopoulos⁴, Scott K. Nagle¹,², Scott B. Reeder¹,⁵, Christopher J. Franois⁶

¹Radiology, UW-Madison, Madison, WI, United States; ²Medical Physics, UW-Madison, Madison, WI, United States; ³Pediatric Cardiology, UW-Madison, Madison, WI, United States; ⁴Cardiothoracic Surgery, UW-Madison, Madison, WI, United States; ⁵Biomedical Engineering, UW-Madison, Madison, WI, United States; ⁶Radiology, University of Wisconsin-Madison, Madison, WI, United States

Determination of the shunt fraction (Qp/Qs) in patients with partial anomalous pulmonary venous return is needed prior to surgical repair. We found no significant difference between the gold standard 2D PC measurements of Qp/Qs and those derived from 4D flow MRA for 5 patients and 10 normal volunteers. These cases have complex extra cardiac venous connections and atrial septal defects that are more amenable to quantify off line using post processing techniques than they are on the scanner trying to proscribe multiple double oblique 2D PC acquisitions.