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Abstract #2515

Mapping the Ventilationperfusion Ratio in Chronic Obstructive Pulmonary Disease Using Oxygen-Enhanced MRI

Penny Louise Hubbard1,2, Geoff J. M. Parker1,2, Dave Singh3, Jrgen Vestbo3, Simon S. Young4, Eva Bondesson5, Lars E. Olsson6, Josephine H. Naish1,2

1Imaging Sciences and Biomedical Engineering, University of Manchester, Manchester, United Kingdom; 2The University of Manchester Biomedical Imaging Institute, Manchester, United Kingdom; 3Airway Pharmacology Group, School of Translational Medicine,, University Hospital of South Manchester Foundation Trust, Manchester, United Kingdom; 4AstraZeneca R & D, Charnwood, United Kingdom; 5AstraZeneca R & D, Lund, Sweden; 6AstraZeneca R & D, Mlndal, Sweden

We present a regional characterisation of the ventilation-perfusion ratio using a novel two-compartment physiological model analysis of oxygen-enhanced MRI data. A preliminary analysis of subjects with chronic obstructive pulmonary disease and age-matched healthy subjects shows how changes in T1 can be related directly to physiological parameters indicative of lung function. This novel MR method is minimally-invasive and repeatable, and reveals enhanced sensitivity to the early onset of disease than more traditional global lung function measures.