Table 1.

Radiographic rechnical data of X‐ray machines.

Centre	X‐ray Tube	Model	Yr. of Installation	Total Filtration (mmAI)	Beam Output at 80 kVp ( $\mu Gy\hspace{0.17em}mA{s}^{-1}$ )
This Study:
UCH	Roentgen 501	CK 3415	1974	2.7	11.60
OAUTHC	Shimadzu	R‐20	1981	1.7	5.20
TDC	Roentgen 201	R‐3149	1998	2.7	4.90
NHA	Philips Optimus	98011519	1999	1.0+0.1 mmCu	12.10
From Study in Sudan (Suliman et al., 2006):
OTH	Shimadzu	Radiotex	2004	3.3	48.2
KTH	Shimadzu	Radiotex	2004	2.5	66.1