After scanning the patient the images are sent to a dedicated workstation with regular endoluminal software. Although possible (Pickhardt and Choi 2003) it is important to stress that no dedicated software (stool subtraction) is needed to read and interpret the tagged data sets adequately. Reading is performed using a primary 2D read with 3D problem solving method (Dachman et al. 1998) (Fig. 4.4). In case of a clean colon, primary 3D read is possible. However if the colon is not clean, the residual stool causes a pseudopolypoid image on 3D and 2D problem solving is necessary (Fig. 4.5). In 2D rendering we read the data sets using lung window (W/L: 1500/-200 H.U.) and soft tissue (W/L: 400/100 H.U.)
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