IJCS | Volume 33, Nº2, March / April 2020

190 Figure 2 - 13 N-NH 3 PET/CT images. Mazzoletti et al. Myocardial ischemia: SPECT and 13 NH 3 PET/TC Int J Cardiovasc Sci. 2020; 33(2):188-191 Case Report the significant diagnosis of ischemia: this information has an important impact on patient prognosis and management. We believe that this case highlights the need to performmore studies evaluating the role of CZT- SPECT inmyocardial blood flow reserve assessment with a larger number of subjects using attenuation and scatter correction. Until further proven, PET results should be considered the gold standard for the quantification of myocardial blood flow. Author contributions Conception and design of the research: Mazzoletti A, Mesquita CT, Giubbini R. Acquisition of data: Mazzoletti A, Dondi F. Analysis and interpretation of the data: Mazzoletti A, Dondi F, Giubbini M. Statistical analysis: Giubbini M. Writing of the manuscript: Mazzoletti A, Dondi F. Critical revision of the manuscript for intellectual content: Mesquita CT, Giubbini R. Potential Conflict of Interest No potential conflict of interest relevant to this article was reported. Sources of Funding There were no external funding sources for this study. Study Association This study is not associated with any thesis or dissertation work. Ethics approval and consent to participate This article does not contain any studies with human participants or animals performed by any of the authors.