Roberts DA, Gefter WB, Hirsch JA, Rizi RR, Dougherty L, Lenkinski RE, Leigh JS Jr, Schnall MD.

The authors used a spin-tagging method of magnetic resonance per- fusion imaging to measure pulmo- nary perfusion in eight healthy volun- teers with use of a respiratory-triggered three-dimensional pulse sequence. The average signal intensity (SI) de- crease upon arterial labeling was 24%. The perfusion S1 increased by 21 % after exercise (P = .02). Focal blood flow abnormalities were ob- served in a patient with chronic ob- structive pulmonary disease.

Radiology. 212(3):890-5, 1999