Rodriguez-Granillo Gaston A, Carrascosa Patricia, Cipriano Silvina, de Zan Macarena, Deviggiano Alejandro, Capunay Carlos, Cury Ricardo C
Department of Cardiovascular Imaging, Diagnóstico Maipú, Buenos Aires, Argentina.
Department of Cardiovascular Imaging, Diagnóstico Maipú, Buenos Aires, Argentina.
Clin Imaging. 2015 Sep-Oct;39(5):809-14. doi: 10.1016/j.clinimag.2015.04.007. Epub 2015 Apr 18.
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.
使用单能（SE）成像评估心肌灌注会受到线束硬化伪影（BHA）的影响。我们试图探究双能（DE）成像减轻BHA存在的能力。在SE组的2240个心肌节段（每个能量水平112个）和320个美国心脏协会节段中评估心肌信号密度（SD）。与最佳能量水平的DE重建相比，SE采集在心肌SD或信噪比方面总体上没有显著差异。受BHA影响最常见的节段在最低能量水平显示出显著较低的心肌SD，在较高能量水平逐渐恢复正常。
