Myokard-Perfusions-SPECT mit Siemens IQ-SPECT

Zusammenfassung

Die proprietäre IQ-SPECT-Technologie von Siemens verwendet sog. smartzoom-Kollimatoren mit spezieller, multifokaler Geometrie. Das Herz wird in der Zentralregion positioniert, wo eine 4-fache Vergrößerung erfolgt. Daraus resultiert eine 4-fache Sensitivitätssteigerung, die eine signifikante Einsparung von Traceraktivität und/oder Akquisitionszeit ermöglicht. Die Kollimatorgeometrie kann typische Schwächungsphänomene bewirken, die bei der klinischen Bewertung der Befunde berücksichtigt werden muss. Im Optimalfall sollte IQ-SPECT mit CT-basierter Schwächungskorrektur eingesetzt werden.

Abstract

The proprietary Siemens IQ-SPECT technology uses so-called smartzoom collimators with a special multifocal geometry. The patient’s heart needs to be centered in the central region, where a magnification of four times will occur. This results in a fourfold increase of sensitivity, which enables for a significant reduction of tracer activity and/or acquisition time. Clinical users need to be aware of typical attenuation phenomena which may be caused by the special collimators’ geometry. In the ideal case, IQ-SPECT should be used with CT-based attenuation correction.

Schlüsselwörter

Myokard-SPECT - IQ-SPECT - Smartzoom-Kollimator - Siemens - Symbia

Key words

Myocardial perfusion SPECT - IQ-SPECT - Smartzoom collimators - Siemens - Symbia

• Literatur

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