Zusammenfassung
[99mTc] Technetium ist aufgrund seiner optimalen physikalischen Eigenschaften für die Bildgebung das meistverwendete Radionuklid in der Nuklearmedizin. Es kann aber nur in Form von Metallkomplexen eingesetzt werden, deren in vivo Verhalten schwer vorhersagbar ist. In den letzten Jahren ist es jedoch durch systematische Variation einer Leitstruktur gelungen, Technetium-Radiopharmaka zu entwickeln, die renal aktiv transportiert werden. Dadurch kann einerseits neben der Glomerulären Filtrationsrate nun auch die Tubuläre Extraktionsrate quantifiziert werden, andererseits ist erstmals die Szintigraphie mit Technetium-markierten Substanzen möglich, die tubulär sezerniert werden.
Abstract
Due to its favourable physical properties, [99mTc] Technetium is the mostly used radionuclide in nuclear medicine. It can only be used as metal complexes, whose pharmacokinetics cannot be predicted easily. By systematic variations of a known compound, Tc-complexes could be synthesized which are actively excreted by the kidneys. Thus, on the one hand, the tubular extraction rate can now be quantified in addition to the glomerular filtration rate and on the other hand, scintigraphic imaging is possible by the use of Tc-pharmaceuticals, which are eliminated by active tubular transport.
Schlüsselwörter
Tc-Radiopharmaka - Nierenfunktionsdiagnostika - Tc-MAG3 - Tc-DADS - Tc-EC
Key words
Tc-radiopharmaceuticals - renal function imaging agents - Tc-MAG3 - Tc-DADS - Tc-EC
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Prof. Dr. W Brandau
Universitätsklinikum Essen
Nuklearchemie und Radiopharmazie
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