Faecal tagging is a feasible alternative to regular preparations. Up to now the best results of polyp detection were obtained using faecal tagging. Therefore faecal tagging is now advocated by an increasing number of investigators as the method of choice to prepare the colon for CT colonography. There are no problems with residual stool mimicking polyps and fluid hampering inspection of the colonic wall. Because of the contrast created between the tagged residue and the non-tagged lesion there is improved polyp conspicuity. It is also possible to improve patient compliance by reducing the cathartic part of the preparation. Barium can be used as the sole tagging agent simplifying the procedure and decreasing the side effects.
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