Moises Jimenez-Santos

Angiografía mediante tomografía computarizada cardiaca: una técnica versátil

Erick Alexánderson Rosas,* Aloha Meave González, and Moisés Jiménez-Santos a Departamento de Cardiologı́a Nuclear, División de Imagen Cardiovascular No Invasiva, Instituto Nacional de Cardiologı́a ‘‘Ignacio Chávez’’, Mexico City, Mexico b Departamento de Resonancia Magnética y Tomografı́a Cardiaca, División de Imagen Cardiovascular No Invasiva, Instituto Nacional de Cardiologı́a ‘‘Ignacio Chávez’’, Mexico City, Mexico c Unidad PET/CT Ciclotrón, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico

Functional Impact of Coronary Stenosis Observed on Coronary Computed Tomography Angiography: Comparison with 13N-Ammonia PET

BACKGROUND AND AIMS We undertook this study to evaluate the functional impact of coronary abnormalities in patients with suspected coronary artery disease (CAD) by means of integrated positron emission tomography (PET) and coronary computed tomography angiography (CCTA) scan obtained on a hybrid state-of-the-art PET/CT scanner. METHODS We studied 29 consecutive, patients with a clinically suspected intermediate risk for CAD, using a hybrid PET/CT 64 slice scanner. During a single scanning session, CCTA was performed for coronary anatomy evaluation, and a rest/adenosine stress (13)N-ammonia PET was performed for myocardial perfusion assessment in 3D mode with CT attenuation correction. RESULTS Twenty four (82.7%) patients had atherosclerosis detected by CCTA; 15 patients had significant (≥50%) coronary stenoses and all 15 patients showed ischemia by PET; moreover, 10/15 patients had a Summed Stress Score >12.20/24 and 83.3% patients with atherosclerosis detected by CCTA showed ischemia by PET. Two of five patients with normal coronary arteries showed ischemia by PET. CCTA agreement in positive identification of PET ischemia was 91% and agreement in ruling out ischemia was 43%; PET agreement in detecting CCTA atherosclerosis was 83%, and agreement in ruling it out was 60%. CONCLUSIONS We found a strong relation between significant coronary stenosis identified by CCTA and ischemia by PET. However, in cases with low-grade stenosis, PET scan can assess the functional significance of atherosclerotic abnormalities.

CHARACTERISTICS OF MYOCARDIAL BRIDGING EVALUATED BY CARDIAC COMPUTED TOMOGRAPHY ANGIOGRAPHY AND PRESENCE OF MYOCARDIAL ISCHEMIA BY SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY

The prevalence of Myocardial Bridging (MB) has been found in 58% in Coronary Computed Tomography Angiography (CCTA), systolic compression and ischemia have been reported. The aim of this study was to describe the MB characteristics in CCTA and the presence of ischemia by Myocardial Perfusion Single

Incidental aortic dissection diagnostic : Importance of hybrid imaging with PET/CT

a Department of Nuclear Cardiology, Instituto Nacional de Cardiologı́a ‘‘Ignacio Chávez’’, Mexico City, Mexico b PET/CT Cyclotron Unit, Faculty of Medicine, Universidad Nacional Autónoma de México, Mexico City, Mexico c Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, Groningen, The Netherlands d Mexican Faculty of Medicine, La Salle University, Mexico City, Mexico