Schizophrenic frontal lobe metabolism stability over time: Test-retest using binary image correspondence : N.G. Cascella, H.H. Holcomb, H. Loats, R. Dannals, H. Wagner, C.A. Tamminga University of Maryland, Johns Hopkins Medical Institutes (Dept. of Radiology, Division of Nuclear Medicine), Loats Associates, Baltimore and Westminster, MD, and Maryland Psychiatric Center, Baltimore, MD 21228