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CT attenuation curves between the center of the tumor and the center of the aorta. The average CT attenuation value of the tumor was examined and the distance between the intersections of this value, with the lower CT attenuation value of the connective tissue, was determined. The minimum CT attenuation value between the tumor and the aorta was also determined. T, tumor; A, aorta; S, spine; CT, computed tomography.
