본 연구의 목적은 혈관의 가상단색성 영상 화질을 단색성 영상과 비교하여 평가한 시뮬레이션 연구이다. 이중에너지 영상은 저에너지와 고에너지 각각 50 keV, 80 keV에서 다섯 가지 물질의 선형감약계수를 바탕으로 획득되었다. 가상단색성 영상을 합성하기 위해 가중계수가 필요하며, 가중계수를 획득하기 위해 간과 뼈를 기저 물질로 사용하였다. 가상단색성 영상은 30 keV에서 100 keV 범위의 에너지에서 합성되었다. 영상 평가는 칼슘과 조영제를 신호로, 혈액을 백그라운드로 설정하여 CNR과 noise로 평가되었다. 연구결과에 따르면, 최대 CNR을 가지는 에너지는 칼슘과 조영제에서 각각 50 keV, 60 keV였다. 최소 noise를 보이는 에너지는 칼슘, 요오드 조영제, 혈액에서 각각 70 keV, 70 keV, 60 keV였다. VM 영상은 noise를 최소화하고 CNR을 최대화하는 최적의 에너지에서의 영상을 구현할 수 있으므로 CT 검사에서 진단능 향상에 기여할 수 있다.
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