RADLVnON QUALITY AND BONE-MARROW DOSE IN RADIOLOGY 



Distance from central axis for field 19x19 cm 

 5 10 15 20 



30 

 20 



100 



5 



r 30 

 I/) 



^ 2 



4; 



"to 

 cK 10 



"O 



0-5 



0-3 

 0-2 



1 — I — I — r 



T 



H.V.L. AO mm Al 

 Depth A-75cm 



J \ i L 



_L 



5 10 



Distance from central axis for fields 

 4xA,7x7and 10x10 



Figure 2 



15 



cm 



Mechanik^ but the mass of bone marrow taken is that given for the standard 

 man by the International Commission on Radiological Protection^. 



The number of X-ray examinations carried out in Australia annually has 

 been determined by obtaining the consumption of X-ray film annually and 



-i — I — I I II 1 1 1 



X Depth A-75cm 

 o Depth 10- 25cm 



0) 



I/) 

 o 

 ■a 



ITl 



-in 



(0 

 u 

 to 



Mill 



III" 



J- 



005 01 



0-2 03 



0-5 10 20 30 50 

 H.V.L.- mm copper 



Figure 3 



32 



20 30 



