Portal de Periódicos da CAPES

Moderated Poster Session: Innovative imaging technologies

2009; Oxford University Press; Volume: 11; Issue: Suppl B Linguagem: Inglês

10.1093/eurheartj/sun074

1554-2815

Fernando Esteves, Paolo Raggi, Russell D. Folks, Zohar Keidar, J. Wells Askew, Shmuel Rispler, M O'connor, Ernest Garcia, Guilhermina Cantinho, Helena Gil Peña, A. Veiga, João P. Monteiro, F. Godinho,

Medical Imaging Techniques and Applications

Objective: We set out to correlate myocardial perfusion SPECT imaging using a novel ultrafast dedicated cardiac camera (UFC) with standard dual detector cameras (S-SPECT) in patients with known or suspected coronary artery disease (CAD).Methods: 138 patients (85 men, mean age 63 + 12 years) underwent one-day Tc-99m tetrofosmin rest/stress myocardial perfusion imaging.Rest/stress UFC images were acquired on list mode immediately prior to S-SPECT images.The UFC is equipped with cadmium zinc telluride solid state detectors and has no moving parts.Rest and stress acquisition times were 4 and 2 min for UFC and 14 and 12 min for S-SPECT.Dedicated software was used for processing and interpretation.Two readers blinded to clinical information independently scored all scans using a standard 5-point scale on a patient level and on a vascular territory level.Image quality was scored on a 3-point scale.A third blinded reader scored the discordant cases.Automated left ventricular ejection fractions were compared.Results: For UFC, image quality was considered excellent in 83%, adequate in 15% and suboptimal in 2%.For S-SPECT, image quality was considered excellent in 67%, adequate in 32%, and suboptimal in 1%.There was a high correlation between UFC and S-SPECT for rest (r¼0.92,p,0.001) and stress (r¼0.92,p,0.001) automated left ventricular ejection fractions.The table shows the % agreement rates between UFC and S-SPECT based on normal and abnormal studies using S-SPECT as the gold standard.Conclusions: Preliminary results suggest that UFC provides diagnostic performance comparable to S-SPECT.Acquisitions can be done in a significantly shorter time with high image quality because of its improved count sensitivity over S-SPECT cameras.