A modified method for labeling human platelets with indium-111 oxine using albumin density-gradient separation.

Abstract
When labeling [human] platelets with 111In oxine, albumin density-gradient separation minimized the time spent to resuspend those platelets that were centrifuged against a hard surface. Labeling efficiency or platelet viability, as measured by platelet survival or aggregation with ADP, were not adversely affected.