Table 1. Each metric was scored between 0–3, 0 = best, 3 = worst.

The accumulative metrics of image quality were combined to form an image complexity score.

Complexity Score
Score	0	1	2	3
Patient Size	Slim	Average	Large	Obese
Patient Rotation	None	Slight	Moderate	Severe
Tubes/Lines/Catheters	0	1	2–4	>4
Image Quality	Excellent	Good	Average	Poor