title: [Measurement of renal circulation using isotope dilution technique after selective arterial injection of 99m-Tc-pertechnetate (author's transl)].
abstract: Report on a method of measuring the middle transit-time (t) which represents a measure for renal circulation. Time-activity curves obtained after arterial injection of 99m-Tc and registration with the Anger camera, could be subdivided into 4 individual curves using a program of calculation (initial drop, 2 waves of recirculation, underlying activity); t characterizes the exponential, perfusion-specific initial drop as reciprocal to the constant k 1. The suitability of 99m-Tc for measuring renal circulation is discussed. The various methods for calculation of the middle transit-time are compared.
mesh_terms: D004395:Dye Dilution Technique; D006801:Humans; D007668:Kidney / Q000098:blood supply*; D007700:Kinetics; D008722:Methods; D011865:Radioisotope Dilution Technique; D011877:Radionuclide Imaging; D012039:Regional Blood Flow; D013667:Technetium
chemical_list: D013667:Technetium
vernacular_title: Bestimmung der Nierendurchblutung unter Verwendung der Isotopenverdünnungstechnik nach selektiver intraarterieller Injektion von 99m-Tc-pertechnetat