Roxana Campisi1,2, Sonia S Traverso3,4. 1. Departments of Nuclear Medicine and Cardiovascular Imaging, Diagnóstico Maipú, Av. Maipú 1668, B1602ABQ, Vicente López, Buenos Aires, Argentina. roxanacampisi@yahoo.com. 2. Department of Nuclear Medicine, Instituto Argentino de Diagnóstico y Tratamiento, Buenos Aires, Argentina. roxanacampisi@yahoo.com. 3. Department of Nuclear Medicine, Instituto Argentino de Diagnóstico y Tratamiento, Buenos Aires, Argentina. 4. Departments of SPECT/CT and PET/CT, Fundación Centro Diagnóstico Nuclear, Buenos Aires, Argentina.