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Abstract #1309

Comparing Gd contrast and non-contrast lung perfusion imaging at 1.5T and 3T

Obruchkov S, Noseworthy M
McMaster University

Two different approaches to lung perfusion were examined, a non contrast free breathing technique with respiratory and cardiac gating was compared to a breath held Gd-enhanced lung perfusion MR imaging. Two techniques were evaluated at two field strengths: 3T and 1.5T. Despite worsening susceptibility at higher field, a 3T MR scanner can be used for evaluation of lung perfusion. We suggest increased SNR at higher field allows non-contrast based MR perfusion imaging comparable to Gd-based bolus methods. Making it possible performing perfusion imaging in clinical populations, where the use of breath holds is often intolerable by patients.