Comparison between the 85K array and the 390K array. Sample CLL189 was hybridized both on 85K and 390K arrays. Arrow points to a false-positive call on the 85K array data by the segmenter. Also shown is a false-negative call by the segmenter on the 85K data (dark blue). It spans CDKN2A (p16^−INK4). Because the 85K array did not have sufficient coverage in this region, the segmenter could not make a reliable lesion call, even though it appears obvious upon inspection of the 85K raw data (dark gray).