RT Journal Article SR Electronic T1 Prolongation of Proton Spin Lattice Relaxation Times in Regionally Ischemic Tissue from Dog Hearts JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 449 OP 453 VO 21 IS 5 A1 Eric S. Williams A1 Jerome I. Kaplan A1 Frederick Thatcher A1 Gerald Zimmerman A1 Suzanne B. Knoebel YR 1980 UL http://jnm.snmjournals.org/content/21/5/449.abstract AB