title: Measuring of AgNORs using image analysis.
abstract: A method is presented for the measurement of AgNORs in histological section using an image analysis system. Measurements are performed at the highest magnification (objective 100x) using a CCD camera. In the first step the AgNORs are segmented, counted and measured. In the second step the AgNOR clusters are segmented. Several features for the description of the AgNORs, the AgNOR clusters and their spatial distribution throughout the nucleus are given. As an internal reference, lymphocytes are used and the size features are given relative to the mean size of AgNORs in the lymphocytes. The reproducibility of the features was tested on a series of astrocytomas. This should be carried out with at least 150 tumor cells and 20 reference cells in order for accurate measurements.
authors.affiliation: Institut für Pathologie der Medizinischen Fakultät (Charité), Humboldt-Universität zu Berlin, Deutschland.
authors.forename: P
authors.initials: P
authors.lastname: Hufnagl
authors.forename: H
authors.initials: H
authors.lastname: Guski
authors.forename: H J
authors.initials: HJ
authors.lastname: Schulz
mesh_terms: D001254:Astrocytoma / Q000473:pathology* / Q000648:ultrastructure; D006801:Humans; D009697:Nucleolus Organizer Region / Q000648:ultrastructure*; D010781:Photography; D012834:Silver; D013194:Staining and Labeling
chemical_list: D012834:Silver