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Fig. 2A —Addition of decubitus view because of inadequate sigmoid distention
with supine and prone positioning in 53-year-old woman. Supine (A) and
prone (B) 2D transverse CT colonographic images show focal segmental
collapse (arrowheads) and fold thickening involving sigmoid colon.
Distention was adequate throughout remainder of large intestine (not shown).
In immediate review of 2D images, CT technologist recognized collapse at same
position on both supine and prone images and obtained additional right lateral
decubitus image.
