Figure 4 - An example of a normal esophageal response to a water swallow displayed as a conventional line plot (left panel) and as a colored topographical plot (right panel).
From the following article
Richard H. Holloway
GI Motility online (2006)
doi:10.1038/gimo30
In this example, lower esophageal sphincter (LES) pressure was recorded with a series of side-hole sensors that straddled the LES segment. In the topographic display, each pressure point has been converted into a color (see pressure color chart at right). The pressure profile between actual esophageal recording points has been calculated by interpolation in order to provide for a continuous display. (See refs. 8 and 27 for further description of the method.)
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