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Abstract

Dual Source CT (DSCT) is new CT medical application, in which three sets of image data can be obtained by two independent X ray tubes to achieve a better tissue differentiation. In the present work, the noise, low contrast and high resolution behavior is measured for the Siemens DSCT system Definition and then compared with other model of the Somaton series. The modern 64-slices detector technology implemented within the Definition produces a relatively large scattered radiation that affects significantly the distinction of low density difference regions and increases the presence of noise. An non uniform illumination anomaly is found in the images obtained in the dual mode of the scanner. Although the z-axis resolution has strongly improve, the noisy character of the DSCT brings a step back in terms of xy-resolution. The use of this of type of scanner is therefore recommended for high speed and thin slice studies.