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FIGURE 1. (A) RPM breathing signal of 1 patient showing "Hold" periods on CT and the first PET frame are displayed. Dashed line corresponds to inflation level at which patient was instructed to hold the breath. This was defined on the fly on the basis of the lung inflation level read during DIBH CT session. The "Hold" signal exhibited a relaxation period of 1–2 s before it stabilized (arrows). Therefore, it was necessary to wait for 1–2 s before starting the acquisition. (B) Consistency in lung inflation levels throughout DIBH PET/CT sessions is shown.
