Abstract
This study compared the mean glandular dose (MGD) displayed by three types of mammography devices, namely, AMULET F with a Mo target, MAMMOMAT Fusion with a W target, and Senographe DS with Mo and Rh targets, and the MGD measured according to the method proposed by Dance. The dose calculation methods of Dance and Wu are used to calculate the displayed MGDs in the three types of mammography devices.
The results showed that when the compressed breast thickness was low, the displayed MGD was less than the measured MGD, and when the breast thickness was higher, the displayed MGD tended to be greater than the measured MGD. The relationship between the measured and displayed MGDs differed depending on the mammography device used. Of the three devices, the Senographe DS, with Mo and Rh targets exhibited a different relationship between the displayed and measured MGDs depending on the target/filter combinations.
In summary, the relationship between the displayed and measured MGDs differed depending on both the compressed breast thickness and the mammography device used. However, verification of the relationship between the displayed and measured MGDs may be useful as an index for monitoring patient exposure during mammographies.
