Compared vulnerabilities to small cardiac motions between different cameras used for myocardial perfusion imaging

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TitreCompared vulnerabilities to small cardiac motions between different cameras used for myocardial perfusion imaging
Type de publicationJournal Article
Year of Publication2019
AuteursSalvadori J, Petegnief Y, Sabbah R, Morel O, Boulahdour H, Karcher G, Marie P-Y, Imbert L
JournalJOURNAL OF NUCLEAR CARDIOLOGY
Volume26
Pagination1313-1322
Date PublishedAUG
Type of ArticleArticle
ISSN1071-3581
Mots-clésanger-cameras, artifacts, CZT-cameras, myocardial perfusion imaging, patient motions
Résumé

This phantom-based study was aimed to determine whether cardiac CZT-cameras, which provide an enhanced spatial resolution and image contrast compared to Anger cameras, are similarly affected by small cardiac motions. Translations of a left ventricular (LV) insert at half-SPECT acquisitions through six possible orthogonal directions and with 5- or 10-mm amplitude were simulated on the Discovery NM-530c and DSPECT CZT-cameras and on an Anger Symbia T2 camera equipped with an astigmatic (IQ.SPECT) or conventional parallel-hole collimator (Conv.SPECT). SPECT images were initially reconstructed as currently recommended for clinical routine. The heterogeneity in recorded activity from the 17 LV segments gradually increased between baseline and motions simulated at 5- and 10-mm amplitudes with all cameras, although being higher for Anger- than CZT-cameras at each step and resulting in a higher mean number of artifactual abnormal segments (at 10-mm amplitude, Conv.SPECT: 3.7; IQ.SPECT: 1.8, Discovery: 0.7, DSPECT: 0). However, this vulnerability to motion was markedly (1) decreased for Conv.SPECT reconstructed without the recommended Resolution Recovery algorithm and (2) increased for DSPECT reconstructed without the recommended cardiac model. CZT-cameras and especially the DSPECT appear less vulnerable to small cardiac motions than Anger-cameras although these differences are strongly dependent on reconstruction parameters.

DOI10.1007/s12350-017-1175-6