Nathan S. Artz1, Rafael L. O'Halloran2,
Mark Schiebler3, James H. Holmes4, Sean B. Fain1,3
1Medical Physics, University of
Wisconsin-Madison, Madison, WI, United States; 2Radiology,
Stanford University, Stanford, CA, United States; 3Radiology,
University of Wisconsin-Madison, Madison, WI, United States; 4Applied
Science Laboratory, GE Healthcare, Madison, WI, United States
Pulmonary
perfusion was assessed in two healthy volunteers using a contrast-enhanced 3D
stack-of-stars GRE sequence.
Consecutive groups of 32 projection angles were reconstructed with
IHYPR for a temporal resolution of ~1s.
The signal vs. time curves demonstrate an expected trend with the
pulmonary artery peaking first, followed next by the parenchyma and later the
left atrium. Mean transit time,
relative pulmonary blood volume and relative pulmonary blood flow maps
demonstrate expected results with mean transit times from 3-5 s after the
main pulmonary artery trunk and shorter MTTs in the posterior region due to
gravity related effects.