Myocardial signal density levels and beam-hardening artifact attenuation using dual-energy computed tomography.
The assessment of myocardial perfusion using single-energy (SE) imaging is influenced by beam-hardening artifacts (BHA). We sought to explore the ability of dual-energy (DE) imaging to attenuate the presence of BHA. Myocardial signal density (SD) was evaluated in 2240 myocardial segments (112 for each energy level) and in 320 American Heart Association segments among the SE group. Compared to DE reconstructions at the best energy level, SE acquisitions showed no significant differences overall regarding myocardial SD or signal-to-noise ratio. The segments most commonly affected by BHA showed significantly lower myocardial SD at the lowest energy levels, progressively normalizing at higher energy levels.
Department of Cardiovascular Imaging, Diagnóstico Maipú, Buenos Aires, Argentina. Electronic address: grodriguezgranillo@gmail.com.
Gaston A
GA
Rodriguez-Granillo
Department of Cardiovascular Imaging, Diagnóstico Maipú, Buenos Aires, Argentina.
Patricia
P
Carrascosa
Department of Cardiovascular Imaging, Diagnóstico Maipú, Buenos Aires, Argentina.
Silvina
S
Cipriano
Department of Cardiovascular Imaging, Diagnóstico Maipú, Buenos Aires, Argentina.
Macarena
M
de Zan
Department of Cardiovascular Imaging, Diagnóstico Maipú, Buenos Aires, Argentina.
Alejandro
A
Deviggiano
Department of Cardiovascular Imaging, Diagnóstico Maipú, Buenos Aires, Argentina.
Carlos
C
Capunay
Miami Cardiac and Vascular Institute and Baptist Health of South Florida, Miami, FL, United States.
Ricardo C
RC
Cury
D000368:Aged; D000704:Analysis of Variance; D016477:Artifacts; D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging* / Q000503:physiopathology; D003326:Coronary Circulation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D055414:Myocardial Perfusion Imaging / Q000379:methods*; D059629:Signal-To-Noise Ratio; D014057:Tomography, X-Ray Computed / Q000379:methods*
Computed tomography; Ischemia; Myocardial infarction; Myocardial perfusion; Perfusion defect