Pulmonary Perfusion: Respiratory-triggered Three-dimensional MR Imaging with Arterial Spin Tagging—Preliminary Results in Healthy Volunteers

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Abstract
The authors used a spin-tagging method of magnetic resonance perfusion imaging to measure pulmonary perfusion in eight healthy volunteers with use of a respiratory-triggered three-dimensional pulse sequence. The average signal intensity (SI) decrease upon arterial labeling was 24%. The perfusion SI increased by 21% after exercise (P = .02). Focal blood flow abnormalities were observed in a patient with chronic obstructive pulmonary disease.