title: Effect of spatial distortion on anger camera field-uniformity correction: concise communication.
abstract: The field uniformity of a computer-assisted Anger-camera system, and the effect of field correction on quantitative data, have been studied. Our results show that the total counts of a source imaged across the crystal face varies with a s.d. of only 2.0%, but routine flood-field correction degrades the data to a s.d. of 9.4%. On the other hand, the area of a source 1.75 in. in diameter, imaged across the crystal face, varies with a s.d. of 9.7%. We conclude that the major source of field nonuniformity for an Anger camera is spatial distortion and not varying sensitivity across the crystal face.
authors.affiliation: State University of New York at Buffalo, USA.
authors.forename: R
authors.initials: R
authors.lastname: Wicks
authors.forename: M
authors.initials: M
authors.lastname: Blau
mesh_terms: D016477:Artifacts; D015902:Gamma Cameras; D011877:Radionuclide Imaging / Q000295:instrumentation*