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The screen orientation should always be “head to the left and tail to the right,” similar to the orientation for radiography (Figure 1.6). Thinking in this manner will help you learn the anatomy you are seeing and help you with the direction you need to go to get to the POCUS and FAST ultrasound structures of interest. The exception to this rule is that most cardiologists reverse the screen orientation of the heart, which is very problematic for learning image acquisition when doing a Global FAST approach. Many human institutions have rejected this approach for the noncardiologists performing POCUS and FAST examinations for the aforementioned reason.

Table 1.1. Degrees of echogenicity of commonly encountered structures.