title: [The dependence of Tc uptake on time of acquisition, ROI and background subtraction].
abstract: Thyroid uptake of 99mTc was compared using different modes of acquisition and evaluation. The starting time of acquisition, 5 min or 20 min after injection, did not make any difference. Comparison of the rectangular standard ROl and an irregular thyroid-shaped ROl showed a slight overestimation by 0.26% for the rectangular ROl. The results demonstrate that certain differences in acquisition and evaluation of TcU are clinically not important; however, if normal values are to be defined, they have to be taken into account.
authors.affiliation: Institut für Klinische und Experimentelle Nuklearmedizin, Universität zu Köln, BR Deutschland.
authors.forename: H
authors.initials: H
authors.lastname: Schicha
authors.forename: L
authors.initials: L
authors.lastname: Bude
mesh_terms: D006801:Humans; D011877:Radionuclide Imaging; D013670:Sodium Pertechnetate Tc 99m / Q000493:pharmacokinetics*; D013679:Technology, Radiologic; D013961:Thyroid Gland / Q000000981:diagnostic imaging* / Q000378:metabolism
chemical_list: D013670:Sodium Pertechnetate Tc 99m
vernacular_title: TcU-Abhängigkeit von Akquisitionszeitpunkt, ROI und Untergrundsubtraktion.