Table 5.

Range factor of DAPs for individual patient and among the selected centers.

Radiograph	Projection	Range Factor for Individual Patients	Range Factor of DAP Among Centers
Abdomen	AP, PA	1.55	2.27
Chest	PA, LAT	2.62	55.84
LSJ	AP, LAT	4.54	10.11
Pelvis	AP, LAT	3.80	7.98
Skull	AP, LAT	2.54	6.93

Notes: $\text{LSJ}\hspace{0.17em}=\hspace{0.17em}\text{lumbo}\hspace{0.17em}\text{sacral}\hspace{0.17em}\text{joint}$; $\text{AP}\hspace{0.17em}=\hspace{0.17em}\text{antero}-\text{posterior}$; $\text{PA}\hspace{0.17em}=\hspace{0.17em}\text{postero}-\text{anterior}$; $\text{LAT}\hspace{0.17em}=\hspace{0.17em}\text{lateral}$.