The importance of a correct positioning of the heart using IQ-SPECT system with multifocal collimators in myocardial perfusion imaging: A phantom study

Abstract

This is the first study investigating how a heart mispositioning can affect diagnostic accuracy with IQ-SPECT system. Mild-to-moderate mispositioning (≤2.5 cm) is unlikely to significantly affect results.

Single Photon Emission Computed Tomography (SPECT) Myocardial Perfusion Imaging Guidelines: Instrumentation, Acquisition, Processing, and Interpretation

“…11,12 The center of this collimator focuses on the heart to increase the myocardial counts acquired. For the remainder of the collimator, the focal length increases as one moves toward the edge of the FOV.…”

How to use cardiac IQ•SPECT routinely? An overview of tips and tricks from practical experience to the literature

“…They found that final images were significantly affected by different positioning (centring on the base vs. the apex) when they were reconstructed without AC (NAC), while no difference was observed with AC. A recent phantom study by Caobelli et al [2] confirmed these results. The effects of mispositioning by up to 2.5 cm were considered unlikely to affect clinical results when AC was applied.…”

Multimodality imaging of the left ventricle: Choosing soundly

“…8 Imaging geometry creates unique attenuation artifact in IQ-SPECT, but this can be significantly reduced with CT attenuation correction. 9,10 SUMMARY Given the multimodality approach that clinicians can take to assess and validate LVEF, it is imperative that both referring and interpreting clinicians understand the advantages and disadvantages of each; specifically, how those align with an individual patient and clinical scenario. It is clear that the work by Pelletier-Galarneau et al 1 further validates and enhances our understanding of the role IQ-SPECT and GBPS imaging play within the spectrum of assessment of left ventricular systolic function.…”