UNASSIGNED: For the evaluation of the average glandular dose (AGD) in @entity433 ( @entity433 ) and digital breast tomosynthesis (DBT) phantoms simulating standard model breasts are used. These phantoms consist of slabs of @entity4625 ( @entity4625 ) or a combination of @entity4625 and @entity691 (PE). In the last decades the automatic exposure control (AEC) increased in complexity and became more sensitive to (local) differences in breast composition. The question is how well the AGD estimated using these simple dosimetry phantoms agrees with the average @entity1 AGD. In this study the AGDs for both dosimetry phantoms and for @entity1 have been evaluated for 5 different x-ray systems in @entity433 and DBT modes. It was found that the ratios between @entity1 and phantom AGD did not differ considerably using both dosimetry phantoms. These ratios averaged over all breast thicknesses were 1.14 and 1.15 for the @entity4625 and @entity4625 -PE dosimetry phantoms respectively in @entity433 mode and 1.00 and 1.02 in the DBT mode. These ratios were deemed to be sufficiently close to unity to be suitable for dosimetry evaluation in quality control procedures. However care should be taken when comparing systems for @entity433 and DBT since depending on the AEC operation, ratios for particular breast thicknesses may differ substantially (0.83-1.96). Although the predictions of both phantoms are similar we advise the use of @entity4625      +      PE slabs for both @entity433 and DBT to harmonize dosimetry protocols and avoid any potential issues with the use of spacers with the @entity4625 phantoms.

Average glandular dose in XXXX and digital breast tomosynthesis: comparison of phantom and @entity1 data.

@entity433 :: ('MESH:C536436', 'Disease') :: ['DM', 'digital mammography'] @entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity4625 :: ('MESH:D019904', 'Chemical') :: ['PMMA', 'polymethyl methacrylate'] @entity691 :: ('MESH:D020959', 'Chemical') :: ['polyethylene']
@entity433 :: (MESH:C536436,Disease) :: ['digital mammography']
