It used a two sets of x-ray and two sets of detector arrays in a single CT gantry (Figure 1.4). Dual means that it used two different energy levels of x-rays, since material have its own attenuation, DECT can utilize the mathematical algorithm when the tissue has been exposed to both low and high energy polychromatic x-ray beams. One of the detectors covers the entire scan field of view (FOV), approximately 50 cm and the others detector is smaller compared to the other one. The advantages of this advancement is it increased the scan speed that is valuable for the cardiac scanning and CT angiography because allow the radiologist obtain more information about patient condition. It also can reduce the radiation dose compared to the single x-ray tube and it reduced the number of scan images that obtain the exact information as a single energy. It also can differentiate body tissue without using a contrast media. In contrast, it difficult to achieve because soft tissues do not possess high atomic
It used a two sets of x-ray and two sets of detector arrays in a single CT gantry (Figure 1.4). Dual means that it used two different energy levels of x-rays, since material have its own attenuation, DECT can utilize the mathematical algorithm when the tissue has been exposed to both low and high energy polychromatic x-ray beams. One of the detectors covers the entire scan field of view (FOV), approximately 50 cm and the others detector is smaller compared to the other one. The advantages of this advancement is it increased the scan speed that is valuable for the cardiac scanning and CT angiography because allow the radiologist obtain more information about patient condition. It also can reduce the radiation dose compared to the single x-ray tube and it reduced the number of scan images that obtain the exact information as a single energy. It also can differentiate body tissue without using a contrast media. In contrast, it difficult to achieve because soft tissues do not possess high atomic