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DOI: 10.1055/s-0042-123614
Myokard-Perfusions-SPECT mit Siemens IQ-SPECT
Myocardial Perfusion SPECT with Siemens IQ-SPECTPublikationsverlauf
Publikationsdatum:
25. April 2017 (online)
![](https://www.thieme-connect.de/media/nuklmed/201701/lookinside/thumbnails/044_10-1055-s-0042-123614-1.jpg)
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.
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Literatur
- 1 Bailliez A, Lairez O, Merlin C. et al. Left ventricular function assessment using 2 different cadmium-zinc-telluride cameras compared with a gamma-camera with cardiofocal collimators: dynamic cardiac phantom study and clinical validation. J Nucl Med 2016; 57: 1370-1375
- 2 Caobelli F, Pizzocaro C, Paghera B. et al. Evaluation of patients with coronary artery disease. IQ-SPECT protocol in myocardial perfusion imaging: Preliminary results. Nuklearmedizin 2013; 52: 178-185
- 3 Caobelli F, Ren Kaiser S. et al. The importance of a correct positioning of the heart using IQ-SPECT system with multifocal collimators in myocardial perfusion imaging: a phantom study. J Nucl Cardiol 2015; 22: 57-65
- 4 Caobelli F, Thackeray JT, Soffientini A. et al. Feasibility of one-eighth time gated myocardial perfusion SPECT functional imaging using IQ-SPECT. Eur J Nucl Med Mol Imaging 2015; 42: 1920-1928
- 5 Imbert L, Poussier S, Franken PR. et al. Compared performance of high-sensitivity cameras dedicated to myocardial perfusion SPECT: a comprehensive analysis of phantom and human images. J Nucl Med 2012; 53: 1897-1903
- 6 Lyon MC, Foster C, Ding X. et al. Dose reduction in half-time myocardial perfusion SPECT-CT with multifocal collimation. J Nucl Cardiol 2016; 23: 657-667
- 7 Pirich C, Keinrath P, Barth G. et al. Diagnostic accuracy and functional parameters of myocardial perfusion scintigraphy using accelerated cardiac acquisition with IQ SPECT technique in comparison to conventional imaging. Q J Nucl Med Mol Imaging 2017; 61: 102-107