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Mental visualization of success prior to a motor skill performance such as an athletic event is important and so is mentally visualizing the path of the ultrasound beam from the probe head (Figure 5.10). To get the “cardiac bump” at the diaphragmatico‐hepatic (DH) view, the probe's beam must be directed toward the muscular apex of the heart which requires the probe being rocked far cranially and the beam approximating being parallel to the sternum. The AFAST CC pouch is in the most gravity‐dependent region of that view so the probe should be directed toward the tabletop (when in lateral recumbency), not at the spine! Visualizing the direction in which the ultrasound beam is projecting from the probe head will contribute to your imaging success, save time, and build confidence in locating structures of interest.

Figure 5.10. Paying attention to the direction of the beam. If the sonographer is to image the heart and its cardiac bump at the DH view, then the beam must be directed where the heart would be. In (A) the beam is directed in the correct direction whereas in (B) the heart will never be imaged. The "H" and red oval represent the heart; the black arrow the ultrasound beam; and the white curved line the diaphragm.

Source: Courtesy of Dr Gregory Lisciandro, Hill Country Veterinary Specialists and FASTVet.com, Spicewood, TX.